EFFECT OF SOME SOIL AMENDMENTS ON EGYPTIAN CLOVER PRODUCTIVITY AND ITS ECONOMIC UNDER EL- SERW CONDITIONS

doi:10.21608/ejas.2020.102550

EFFECT OF SOME SOIL AMENDMENTS ON EGYPTIAN CLOVER PRODUCTIVITY AND ITS ECONOMIC UNDER EL- SERW CONDITIONS

Egyptian Journal of Applied Science

Article 5, Volume 35, Issue 3 - Serial Number 1, March and April 2020, Pages 1-22

Document Type: Original Article

DOI: 10.21608/ejas.2020.102550

Abstract

ABSTRACT
Two field experiments were conducted at the Experimental Farm Station of El-Serw, Damietta Governorate, A. R. C. Egypt during 2016/2017 and 2017/2018 seasons. The aim was to study the effect of soil amendments different rates i.e. (compost, gypsum and humic acid) different rates (2, 4 and 6 ton fed^-1) for compost and gypsum, while the rate of humic acid was (20, 40 and 60 kg fed^-1) on Egyptian clover (Trifolium alexanderinum L.,) productivity and itseconomic evaluation. The experiments were laid out in a complete randomized block design with three replicates. The results could be summarized as follows:-
-Soil amendments improved some agronomic characters i.e. plant height, dry leaves/stem ratio , no. of heads m^-2and 1000-seed and humic acid at a rate of 60 kg humic acid fed^-1+ recommended NPK recorded the highest values for these characters in combined.
-Crude protein, digestible crude protein percentages were increased by adding soil amendments for soil salinity and at the same time crude fiber % was behaved opposie.
- Mean values of Egyptian clover yields fed^-1(fresh, dry, seed and straw) were increased by adding soil amendments and humic acid at a rate of 60 kg fed^-1 + recommended NPK recorded the highest values for these traits.
- Compost, gypsum and humic acid increased macro and micro elements % of Egyptian clover plants compared with untreated treatments and humic acid at a rate of 60 kg fed^-1 + recommended NPK recorded the highest values for macro and micro elements.
-The best treatment T₁₀(60 kg humic acid fed^-1+ recommended NPK) which realize the highest value for B/C (1.36).

Highlights

CONCLUSION

This study investigated the evaluation of soil amendments on productivity and quality of Egyptian clover. This could be attributed to the role of soil amendments and growth stimulators in increasing the grown plants under saline soil conditions .Recommendation possible using humic acid to increasing Egyptian clover yields and quality as well as economic return, where this transaction achieved the highest economic return reached (15551.15) and profitability (1.36).

Keywords

Key Words: Egyptian clover productivity; soil salinity; Gypsum; humic acid; compost and economic evaluation

Full Text

Egypt. J. of Appl. Sci., 35 (3) 2020 1-22

EFFECT OF SOME SOIL AMENDMENTS ON EGYPTIAN CLOVER PRODUCTIVITY AND ITS ECONOMIC UNDER EL- SERW CONDITIONS

Azza Kh. M. Salem¹. and S. M. H. Eissa²

1- Forage Crops Res. Dep., Field Crops Res. Inst., A.R.C., Giza, Egypt

2 - Economic and Environment Evaluation Res. Dep., Central Laboratory for Design and Statistical Analysis Res. A.R.C., Giza, Egypt

Key Words: Egyptian clover productivity, soil salinity, Gypsum, humic acid, compost and economic evaluation

ABSTRACT

Two field experiments were conducted at the Experimental Farm Station of El-Serw, Damietta Governorate, A. R. C. Egypt during 2016/2017 and 2017/2018 seasons. The aim was to study the effect of soil amendments different rates i.e. (compost, gypsum and humic acid) different rates (2, 4 and 6 ton fed^-1) for compost and gypsum, while the rate of humic acid was (20, 40 and 60 kg fed^-1) on Egyptian clover (Trifolium alexanderinum L.,) productivity and itseconomic evaluation. The experiments were laid out in a complete randomized block design with three replicates. The results could be summarized as follows:-

-Soil amendments improved some agronomic characters i.e. plant height, dry leaves/stem ratio , no. of heads m^-2and 1000-seed and humic acid at a rate of 60 kg humic acid fed^-1+ recommended NPK recorded the highest values for these characters in combined.

-Crude protein, digestible crude protein percentages were increased by adding soil amendments for soil salinity and at the same time crude fiber % was behaved opposie.

- Mean values of Egyptian clover yields fed^-1(fresh, dry, seed and straw) were increased by adding soil amendments and humic acid at a rate of 60 kg fed^-1 + recommended NPK recorded the highest values for these traits.

- Compost, gypsum and humic acid increased macro and micro elements % of Egyptian clover plants compared with untreated treatments and humic acid at a rate of 60 kg fed^-1 + recommended NPK recorded the highest values for macro and micro elements.

-The best treatment T₁₀(60 kg humic acid fed^-1+ recommended NPK) which realize the highest value for B/C (1.36).

INTRODUCTION

Egyptian clover (Trifolium alexandrinum L) is the main winter forage legume crop. In Egypt it occupies about one fourth of the cultivated area with average of 1.63 million feddan (B.A.S. 2016). Berseem is a major seed export crop (more than 12000 tons) (El-Nahrawy, 2005). It is known as “king of fodders” because of it’s the highest green fodder producing capacity among fodders. Egyptian clover has no anti-nutritional and toxic effects. It is mostly used as green forage, but in off season it is also used in the form of hay and pallets (Nigam et al., 2010).

2 Egypt. J. of Appl. Sci., 35 (3) 2020

Recently, cultivation of Egyptian clover is increases due to number of cuts, fast growth, freshness, and quality of forage production (Rouhi et al., 2012).

Soil salinization is a major factor contributing to the loss of productivity of cultivated soils. Although difficult to estimate accurately, the area of salinized soils is increasing and this phenomenon is especially intense in irrigated soils. It was estimated that about 20% (45 million ha) of irrigated land, producing one-third of the world’s food, is salt-affected (Shrivastava and Kumar, 2015).

The compost can be a very good organic amendment in saline agriculture as well as for reclamation of salt–affected soils (Zaka, et al., 2003). Mohamed and Matloub (2007) reported that the highest reduction in the EC value was in the soil surface of soil treated with compost. Compost also improves nutrient supply to plants and thus may reduce the input of mineral fertilizer (Sarwar et al., 2008). Rashad et al. (2011) reported that compost application to soil led to positive effect as it improved the soil properties ameliorated the plant growth and enhanced nutrient's uptake. Lingorski (2012) found that the application of organic fertilizer increased the obtained green and dry mass by 20.43% more than the untreated standard crop. Thalooth et al. (2015) found that chemical composition and nutritional evaluation for dry forage yield was conducted and the (bio + O + N) was the best treatment in fresh and dry yields for Egyptian clover - ryegrass mixture as well as chemical components and nutritive evaluation i.e. (crude protein, crude fiber and digestible crude protein percentages. Bakhoum et al. (2016) found that treatment of bio+ organic + mineral fertilization was the best treatment in fresh and dry Egyptian clover yields as well as chemical components and evolution i.e. crude protein, crude fiber, digestible crude protein percentages. Sayed and Shaban (2016) found that the increase of compost rate (5, 10 and 15 ton fed^-1) gave increases of all growth traits and yield compared with the control.Abd El-Naby et al. (2018) found that the herbage yield of berseem clover cultivar (Serw-1) substantially increased with the application of soil amendments. The greatest yield increase was obtained with the compost application. The composite, compost and gypsum soil amendments were the most effective treatments resulting in the greatest herbage yield and quality values.

Gypsum plays a significant role in the reclamation of saline-sodic soils by providing a Ca₂+ cation to replace the exchangeable Na+ from the colloid's cation exchange positions and leaching it out from the root zone into groundwater (Sharma and Minhas, 2005). Gypsum is a moderately soluble source of plants essential nutrients, calcium and sulphur (Dick et al., 2008). Calcium (Ca) plays an essential role in processes that preserve the structural and functional integrity of plant membranes, stabilize cell wall structure, regulate ion transport and selectivity, and control ion exchange behavior as well as enzyme activities (Esringu, et al., 2011).

Egypt. J. of Appl. Sci., 35 (3) 2020 3

Gypsum reduced the electrical conductivity (EC) and sodium adsorption ratio (SAR) of the soil, but did not affect soil pH. Also, a significant effect on green and dry fodder yield, and the contents of nitrogen, phosphorus, calcium, and crude protein of berseem, as well as help to improve the cultivation of berseem in saline soils (Ihsanullah and Özgür, 2013).

Humic acid (HA) is known to contain carboxyl, alcoholic hydroxyl, ketone, quinoide and phenolic hydroxyl (Canellas et al., 2015). Furthermore, HA is a fraction of humic substances composed of a long chain molecule, which is high in molecular weight and soluble in an alkaline solutions. It is consisting from the organic components of soil, humus, peat and coal. It is a byproduct of microorganisms that break down dead organic matter (Sebastiano et al., 2005). Humic acid as an alternative source of organic amendment is compact, easy to ship, readily available, and its producers claim that 1 kg of HA provides as much fertilization benefit as one ton of manure (Humintech, 2012). Nardi et al. (2002) proposed that humic acid could directly influence plant growth components such as cell permeability, respiration, photosynthesis, and cell elongation. Humic acid can enhance plant growth by promoting the bioavailability of nutrients via reform of the soil environment at the roots (Chen et al., 2004). Humic acid was the main source of nitrogen (N), phosphorus (P), and potassium (K) (Panuccio et al. 2001). Haghighi et al. (2014) showed that humic acid had advantageous effects on nutrient uptake, particularly in availability and transport of micronutrients. Humic acid provides numerous benefits to soil properties and crop production. In this concern.. Abbas, et al. (2015) found that the highest values of plant height, fresh and dry forage yields from the combination of soaking seeds plus foliar application with humic acid solution. N, P and K uptake were enhanced by this treatment. Ismail and Hassanen (2019) found that berseem clover treated with humic acid increased the plant height, fresh, dry and seed yields, weight of 1000- seeds, crude protein, digestible crude protein of forage yield as compared with control. Humic acid is a commercial product contains many elements which improve the soil fertility and increase availability of nutrients and consequently increase plant growth and yield. It is particularly used to ameliorate or reduce the negative effect of salt stress. Sangeetha et al. (2006) stated that humic acids in the soil have multiple effects that can greatly benefit plant growth. Moreover, Abbas, et al. (2013) showed that application of the tested soil conditioners increased total NPK content of mono -cut Egyptian clover plants compared with the control.

4 Egypt. J. of Appl. Sci., 35 (3) 2020

Economic returns of any crop depend on factors such as price expectations, labour and input availability, soil structure and crop rotation. The feasibility study supports the fact that growing forage crops under north Sinai conditions is advisable economically in some districts such as Rummana. This district earns maximum ton^-1 profits. It was noticed that, among winter forage crops, the cost ton^-1 for Egyptian clover ranged from 1101.20 L.E. (Egyptian pounds) Magdy et al. (2014). Ismail and Hassanen (2019) found that the highest value of net return per one invested L.E was achieved when using humic acid (5.40 L.E) and Compost-t (4.15 L.E) compared with N fertilization (control 2.63 L.E).

This investigation is aim to possibility using some soil amendments i.e compost, gypsium and humic acid to improve yields of Egyptian clover and its economic returnunder El- Serw conditions.

MATERIALS AND METHODS

Two field experiments were conducted at the Experimental farm of El-Serw Agri. Res. St., A. R.C, Domieeta Governorate, Egypt during 2016/2017 and 2017/2018 seasons to study the effect of different rates of soil amendments i.e. (compost and gypsum) at rates (2, 4 and 6 ton fed^-1) and humic acid at rates (20, 40 and 60 kg fed^-1) on Egyptian clover (Trifolium alexandrirnum L.,) variety Serw -1 forage and seed yields productivity, quality, and its economic. A completely randomized blocks design with three replicates was used in the field experiments. Each plot area was 3 X 4 m = 12 m².The soil samples were taken at random before planting at depth of 0-30 cm from soil surface to determine the important physical and chemical soil properties. The soil analyses of the experimental site was done according to Klute (1986) and Cottenie et al. (1982) and are shown in Table 1.

Table (1). Particle size distribution % and some soil chemical soil characteristics of the experimental site (average of 2016/2017 and 2017/2018 seasons).

Particle size distribution (%)

Texture

O.M (%)

CaCO₃

(%)

Coarse sand

Fine sand

Silt

Clay

5.69

10.85

35.84

47.62

Clay

0.64

6.40

pH (1:2.5)

(dSm^-1)

Cations (meq/l)

Anions (meq/l)

Ca⁺⁺

Mg⁺⁺

Na⁺

K⁺

HCO₃^-

Cl^-

SO₄^--

8.04

5.42

14.86

23.94

54.65

0.75

8.75

45.88

39.57

Macronutrients (mg/kg)

Micronutrients (mg/kg)

36.73

3.55

150

4.98

2.75

0.54

The treatments were application of gypsum and compost before 20 days from planting, while the humic acid was applicationduring the sowing. Some chemical properties of applied both compost and humic acid are presented in Table (2 and 3).

Egypt. J. of Appl. Sci., 35 (3) 2020 5

Treatments can describe as follows:

T₁ (recommended NPK), T₂ (2 ton compost fed^-1+T₁), T₃ (4ton compost fed^-1+T₁), T₄ (6ton compost fed^-1+T₁), T₅ (2 ton Gypsum fed^-1+T₁), T₆ (4ton Gypsum fed^-1+T₁), T₇ (6ton Gypsum fed^-1+T₁), T₈ (20 kg Humic acid fed^-1+T₁), T₉(40 kg Humic acid fed^-1+T₁ ),T₁₀ (60 kg Humic acid fed^-1+T₁ ).

The compost and analysis was done according to the standard methods as described by Brunner and Wasmer (1978).

Table (2) Chemical analysis of compost.

Moisture content %

EC dSm^-1

C/N

O.M

(%)

(mgkg^-1)

22-27

3.55

7.46

9.1

2.87

0.87

3.37

229

112

130

Table (3). Chemicals properties of the humic acid substance.

EC (dSm^-1)

O.M

(%)

Macronutrients (%)

Micronutrients

(mgkg^-1)

7.78

1.85

72.00

2.20

3.21

10.30

422

274

215

25.43

The preceding crop was rice for the two seasons. Recommended agricultural practices were done, i.e., recommended fertilizer rates, Superphosphate at rate 150kg fed^-1 (15.5% P₂O₅) was applied during soil tillage and potassium 24kg fed^-1 K₂O in the form of potassium sulphate (48% K₂O) before sowing. Furthermore, Nitrogen fertilizer at rate 15kg N fed^-1 in the form of ammonium nitrate (33.5%N) was applied before the second irrigation. The experiments were sown on October 20^thand 18^th in the 2016/ 2017 and 2017/2018, respectively. Egyptian clover cv. "Serw-1" seeds were hand broadcasted in the presence of thin layer of irrigation water, and seeding rate was 30 kg fed^-1and seeds were inoculated with appropriate Rhizobia (Okadin) before planting.

Three cuts were taken before leaving the crop for seed production from each season. The first cut was taken after 60 days from sowing date to insure the enough carbohydrates in the roots, the second after 50 days from the first one and third cut was taken after 40 days from the second cut. Berseem plants were leaved without cutting from 20^th April to seed production and harvest was done on jun 20 and 14 for the two successive seasons 2016/2017 and 2017/2018, respectively.

The following characters were measured:

Yield and its components: Ten guarded plants were randomly chosen from each plot before cutting,

1-Plant height (cm): Measured in cm from ground surface to the top of the plant.

2- Dry leaves: stem^-1 ratio: By dividing the dry weight of leaves on dry weight of stem =leaves dry wt./ stem dry wt.

3- Fresh forage yield (ton fed^-1): Plots were hand clipped and weighed in kg plot^-1, then adjusted into ton fed^-1 . Total fresh yield was calculated by sum of cuts yield.

6 Egypt. J. of Appl. Sci., 35 (3) 2020

4- Dry forage yield (ton fed^-1) estimated by using, fresh forage yield of each plot x mean dry matter percentage, where dry matter percentage was determined from random samples of 200 g from each plot at each cut, after drying in an oven at 105°C until weight constancy.

From the harvested material of biological yield, a sample of five heads was taken,

5- Number of heads m^-2.

6.1000-seed weight (g).

7. Seed and straw yields fed^-1. Every plot was harvested individually and calculated to the seed yield (kg fed^-1) and straw yield (ton fed^-1).

Chemical composition:

Plant samples which collected from each plot were weighed and oven dried at 70⁰C for 48h upto the constant weight, ground and prepared and following the conventional methods recommended by the Association of the Official Agricultural

Chemists (A.O.A.C., 2002) to determine

1-Crude protein percentage (CP %): N content in forage was determined by the Microkelahl method and crude protein percentage (CP %). The (CP) content was calculated from the N content (CP = N × 6.25), (Bozkurt and Kaya, 2010).

2-Digestible crude protein (DCP %) was calculated to DCP=(CPX0.9115)- 3.62) according to Mcdonald et al., 1994.

3-Crude fiber percentage (CF%): was determined by the method of A.O.A.C., 2002.

4- P spectrophotometically using stannous chloride reagent, K by the Flame photometer, Zn, Mn and Fe were determined by atomic absorption spectrophotometeric according to Chapman and Pratt (1961).

Economic evaluation:-

According to Heady and Dillon (1961) economic evaluation calculated for yield (ton fed^-1), total variable cost, Gross Income (GI), Gross Margin (GM) and Benefit/Cost ratio (B/C) where:

Gross Income (GI) = price of unit L.E X Yield (t fed^-1)

Gross Margin (GM) = Gross Income – Total cost

Benefit/Cost ratio (B/C) =Gross Margin (GM) /Total cost

Statistical Analysis:

Data were statistically analyzed according to Snedecor and Cochran (1990) and treatment means were compared by least significant difference test (LSD) at 0.05 level of significance. Bartlett’s test was done to test the homogeneity of error variance. The test was not significant for all assessed traits, so, the two season’s data were combined.

Egypt. J. of Appl. Sci., 35 (3) 2020 7

RESULTS AND DISCUSSION

Effect of different soil amendments rates on:

1-Some agronomic characters of Egyptian clover.

Data presented in Table (4) indicated that adding different rates of soil amendments i.e. compost, gypsum and humic acids significantly affected on plant height, dry leave/stem ratio, number of heads and 1000-seed weight in the first and second seasons as well as in combined. Results showed that Egyptian clover plant height was significantly increased by soil amendments rates as shown in Table (4). Increasing soil amendments rates from 2 to 4 up to 6 ton fed^-1 for compost

or gypsum and 20 to 40 up to 60 kg fed^-1 in humic acid gradually increased plant height. It is quite evident that humic acid significantly increased plant height followed by compost followed by gypsum as a soil amendments for soil salinity. The highest plant height was obtained was achieved at 60 kg humic acid fed^-1 + recommended NPK (68.68cm) and the lowest value was showed at control treatment (57.38) as mean values in combined. This result may be due to the role of humic as being a source of nutrients in increasing soil fertility, which consequently increased the growth of Egyptian clover and reduce the negative effect of salt stress. The obtained results were agreement with those attained by Sangeetha et al. (2006 ) and Ismail and Hassanen (2019).

Results in Tale (4) indicated that dry leave/stem %, was significantly increased by increasing soil amendment rates. It is quite evident that these characters were markedly and linearly increased with the increase in soil amendments rates from 2 to 4 up 6 ton compost or gypsum fed^-1 and 20 to 40 up 60 kg humic acid fed^-1. This might be related to improvement in physical conditions of the soil provided energy for micro organism activity and increase the availability and uptake of N, P and K which were positively reflected on the growth (Romero et al., 2000 and Vendrame et al., 2005). Similar results were obtained by Mazhar et al. (2011) and Jena and Kabi (2012). Number of heads m^-2 and 1000-seed weight behaved the same trend of plant height in the first and second seasons as well as in combined. Data in Table (4) showed that number of heads m^-2was increased by 38.50% and 19.50% for1000-seed weight compared with control treatment in combined with 60 kg of humic acid fed^-1+ recommended NPK. Similar results were obtained by Gharib et al. (2008), El-Hefny (2010) and Abbas et al. (2015).

Table (4): plant height, dry leave /stem ratio, No. of heads m^-2 and 1000 seed weight by different rates of soil amendments in both seasons and combined.

Treatments

Plant height (cm)

Dry leave /stem ratio (%)

No. of heads m^-2

1000- seed weight

1^st cut

2^nd cut

3^rd cut

Mean cuts

1^st cut

2^nd cut

3^rd cut

Mean cuts

Season 2016/2017

Different rates of soil amendments

49.20

54.20

66.70

56.70

35.1

33.1

32.3

33.5

537.24

3.16

51.30

58.10

70.60

60.00

38.2

36.4

34.2

36.3

653.16

3.42

54.20

60.30

73.00

62.73

40.6

39.3

37.4

39.1

687.31

3.56

56.20

64.40

75.200

65.27

43.5

42.9

40.1

42.2

698.30

3.68

50.90

57.30

68.83

59.01

36.4

35.2

33.1

.34.9

648.42

3.32

53.40

59.40

72.10

61.63

39.3

38.1

35.2

37.5

661.51

3.45

55.10

60.50

74.30

63.30

42.1

41.4

38.3

40.6

684.48

3.50

53.00

59.33

71.30

61.21

40.3

40.1

36.3

38.9

677.98

3.48

55.60

62.20

74.20

64.00

42.3

42.0

39.4

41.2

708.60

3.58

T10

59.20

67.10

77.50

67.93

45.6

44.7

42.6

44.3

721.61

3.78

L.S.D 0.05

1.90

1.81

1.92

1.58

1.40

1.30

1.20

1.11

7.39

0.04

Season 2017/2018

50.40

55.40

67.20

58.07

38.2

35.1

33.2

35.5

543.21

3.20

53.20

60.30

73.40

62.30

42.1

40.0

38.1

40.7

667.14

3.49

55.70

62.30

76.10

64.70

43.3

42.2

40.2

41.9

686.31

3.60

58.10

65.10

78.20

67.13

45.4

44.1

41.3

43.6

733.41

3.71

51.60

58.20

70.20

60.00

41.3

39.1

37.2

39.2

660.33

3.34

54.80

60.50

74.53

63.28

42.2

41.1

39.3

40.9

673.31

3.47

56.60

63.80

76.87

65.66

43.0

42.1

41.2

42.1

695.36

3.59

54.50

61.30

73.60

63.13

42.8

40.9

39.5

41.1

685.26

3.52

56.80

63.10

76.40

65.43

43.6

42.2

41.2

42.3

709.81

3.63

T10

60.30

68.80

79.20

69.37

46.3

45.1

43.4

44.9

774.86

3.82

L.S.D 0.05

2.23

1.62

2.02

2.07

1.10

1.83

1.02

1.03

9.46

0.07

Combined over seasons

49.80

54.80

66.95

57.38

36.7

34.1

32.8

34.5

540.23

3.18

52.25

59.20

72.00

61.05

40.2

38.2

36.2

38.2

660.15

3.46

54.95

61.30

74.90

63.72

42.0

40.8

38.8

40.5

686.81

3.58

57.15

64.75

76.70

66.20

44.5

43.5

40.7

42.9

715.86

3.70

51.25

57.75

69.52

59.51

38.9

37.2

35.2

37.1

654.38

3.33

54.10

59.95

73.32

62.46

40.8

39.6

37.3

39.2

667.41

3.46

55.85

62.15

75.58

64.48

42.6

41.8

39.8

41.4

689.92

3.55

53.75

60.32

72.45

62.17

41.6

40.5

37.9

40.0

681.62

3.50

56.20

62.65

75.30

64.72

43.0

42.1

40.3

41.8

709.21

3.61

T10

59.75

67.95

78.35

68.68

46.0

44.9

43.0

44.6

748.24

3.80

L.S.D 0.05

2.01

1.81

1.66

2.17

1.72

1.31

1.50

1.40

11.26

0.08

T₁(recommended NPK), T₂(2ton compost fed^-1+T₁), T₃(4ton compost fed^-1+T₁), T₄(6ton compost fed^-1+T₁), T₅ (2ton Gypsum fed^-1+T₁), T₆ (4ton Gypsum fed^-1+T₁), T₇ (6ton Gypsum fed^-1+T₁), T₈ (20 kg Humic acid fed^-1+T₁), T₉ (40 kg Humic acid fed^-1+T₁ ), T₁₀ (60 kg Humic acid fed^-1+T₁ )

Egypt. J. of Appl. Sci., 35 (3) 2020 9

2-Crude protein (CP), desigtable crude protein (DCP) and crude fiber (CF) percentages:-

Results showed a significant effect of soil amendments rates on percentages of (CP), (DCP) and CF of Egyptian clover plants in both seasons and combined Table (5). It is clear that when soil amendments rates i.e compost and gypsum from 2 to 4 to 6 ton fed^-1 and 20,40 to 60 kg humic acid fed^-1 a marked increase in crude and digestible protein percentages whereas, a marked decrease in crude fiber percentage either in both seasons or in combined. The percentages of crude and digestible protein were increased consistently with the increase of soil amendments rates in 1^st, 2^nd and 3^rd cuts whereas at light soil amendments rates the increases in these contents were quite compared with control treatments. The highest percentages of crude and digestible protein as averages were recorded with added 60 kg humic acid fed^-1 + recommended NPK and being 19.11 and 13.80% for crude and degistable protein percentages, respectively. Whereas, the lowest values were 15.54 and 10.55% for control treatment as mean value in combined. These results may be due to the effect of humic acid application on N, P and K concentration were increased by increasing humic rate (Mazhar et al. (2011). Also, humic had positive increase of the NPKTuran et al. (2011) Such increase of CP yield under different sources of fertilizers may be attributed to the increase in the concentration of available nitrogen in root medium as a result of mineral N fertilizer. Similar findings were recorded by Read et al. (2011) and Dordas et al. (2012).

With respect crude fiber percentage behaved the opposite trend of crude and digestible protein percentages as shown in Table (5). It is clear that increasing soil amendments rates significantly reduced crude fiber percentage than control treatments. The lowest crude fiber % as a mean cuts that of 60 kg humic acid fed^-1 + recommended NPK where a reduction of 13.73% was recorded compared with control treatment in combined. These results were similar with those obtained by El-Hefny (2010) and Bakhoum et al. (2016).

3- Yields of Egyptian clover:-

In both seasons and combined, soil amendments significantly increased fresh and dry yields fed^-1 for 1^st, 2^nd and 3^rd cuts as well as total cuts compared with control treatments (Table 6). The increase in fresh and dry yields was more evident when soil amendments rates increased up to 6 ton fed^-1 compost or gypsum or 60 kg humic acid fed^- ¹. The highest fresh and dry yields fed^-1 were obtained with the soil amendmentstreatments including 60 kg humic acid fed^-1+ recommended NPK, fresh and dry yields of these treatments were increased by yields of these treatments were increased by 54.72 and 47.26% as a total cuts in combined compared with control treatments, respectively. These results of fresh and dry yields were related to plant height which increases as a result of adding soil amendments rates to improve soil salinity. This observed effect of humic acid treatment on Egyptian clover fresh and dry yields fed^-1 might be attributed to the ability of organic fertilizers to provide plants with different nutrients, and cause an improvement of soil water holding capacity, These results are in agreement with those obtained by Salama (2015) who found that the application of the humic acid resulted in significantly increasing the fresh and dry yields fed^-1 compared to the control treatment. This might be attributed to the correction of N deficiency and, thus, improved soil properties upon humic acid application. Abbas and Awad (2018) who indicated that the application of humat potassium rate increase was positive and significant increases in both fresh and dry forage yields fed^-1.

Table (5): Crud Protein (%), digestible crud Protein (%) and crude Fiber of Egyptian cloveras affected by different rates of soil amendments

Treatments

Crud Protein (%)

DCP (%)

Crud Fiber (%)

1^st cut

2^nd cut

3^rd cut

Mean cuts

1^st cut

2^nd cut

3^rd cut

Mean cuts

1^st cut

2^nd cut

3^rd cut

Mean cuts

Season 2016/2017

Different rates of soil amendments

15.04

16.28

15.32

15.55

10.09

11.22

10.34

10.55

22.63

20.30

24.01

22.31

15.60

16.98

16.25

16.28

10.60

11.86

11.19

11.22

22.01

19.61

23.36

21.66

16.23

17.87

17.21

17.10

11.17

12.67

12.07

11.97

21.61

18.92

22.00

20.84

17.51

18.64

18.15

18.10

12.34

13.37

12.92

12.88

20.80

18.02

21.11

19.98

15.06

15.77

15.19

15.34

10.11

10.75

10.23

10.36

22.81

19.91

23.76

22.16

16.13

16.88

16.41

16.47

11.08

11.77

11.34

11.40

22.31

19.34

23.08

21.58

16.86

17.62

17.11

17.20

11.75

12.44

11.98

12.05

21.80

18.61

22.00

20.80

16.18

17.02

16.92

16.71

11.13

11.89

11.80

11.61

21.34

19.31

23.13

21.26

16.91

17.92

17.71

17.51

11.79

12.71

12.52

12.34

20.61

18.74

21.48

20.28

T10

18.17

19.66

19.21

19.01

12.94

14.30

13.89

13.71

20.01

17.31

20.80

19.37

L.S.D at 0.05

0.54

0.60

0.64

0.41

0.48

0.61

0.59

0.61

0.38

0.54

0.61

0.53

Season 2017/2018

15.10

16.30

15.21

15.54

10.14

11.24

10.24

10.54

22.45

20.11

23.83

22.13

15.85

17.11

16.21

16.39

10.83

11.98

11.16

11.32

21.82

19.44

23.01

21.42

16.31

17.91

17.14

17.12

11.25

12.70

12.00

11.98

20.86

18.44

21.88

20.39

17.68

18.70

18.02

18.13

12.50

13.43

12.81

12.91

20.01

17.31

20.83

19.38

15.63

16.07

15.92

15.87

10.63

11.03

10.89

10.85

22.61

19.61

23.59

21.94

16.20

16.94

16.56

16.57

11.15

11.82

11.47

11.48

22.01

19.01

22.96

21.33

16.91

17.80

17.35

11.79

12.60

12.19

12.20

21.62

18.62

21.78

20.67

16.36

17.34

16.88

16.86

11.29

12.19

11.77

11.75

21.04

19.04

22.93

21.00

17.26

18.20

17.67

17.71

12.11

12.97

12.49

12.52

20.24

17.01

21.17

19.47

T10

18.40

19.87

19.34

19.20

13.15

14.49

14.01

13.88

19.77

16.49

20.61

18.96

L.S.D at 0.05

0.43

0.73

0.54

0.56

0.38

0.43

0.42

0.37

0.33

0.35

0.42

0.34

Combined over seasons

15.07

16.29

15.27

15.54

10.12

11.23

10.29

10.55

22.54

20.21

23.92

22.22

15.73

17.05

16.23

16.33

10.71

11.92

11.17

11.27

21.92

19.53

23.19

21.54

16.27

17.89

17.18

17.11

11.21

12.69

12.04

11.98

21.24

18.68

21.94

20.62

17.60

18.67

18.09

18.12

12.42

13.40

12.86

12.89

20.41

17.67

20.97

19.68

15.35

15.92

15.56

15.61

10.37

10.89

10.56

10.61

22.71

19.76

23.68

22.05

16.17

16.91

16.49

16.52

11.11

11.79

11.41

11.44

22.16

19.18

23.02

21.45

16.89

17.71

17.23

17.28

11.77

12.52

12.09

12.13

21.71

18.62

21.89

20.74

16.27

17.18

16.90

16.78

11.21

12.04

11.78

11.68

21.19

19.18

23.03

21.13

17.09

18.06

17.69

17.61

11.95

12.84

12.50

12.43

20.43

17.88

21.33

19.88

T10

18.29

19.77

19.28

19.11

13.05

14.40

13.95

13.80

19.89

16.90

20.71

19.17

L.S.D at 0.05

0.38

0.34

0.31

0.36

0.34

0.32

0.38

0.33

0.49

0.43

0.53

0.45

T₁(recommended NPK), T₂(2ton compost fed^-1+T₁), T₃(4ton compost fed^-1+T₁), T₄(6ton compost fed^-1+T₁), T₅ (2ton Gypsum fed^-1+T₁), T₆ (4ton Gypsum fed^-1+T₁), T₇ (6ton Gypsum fed^-1+T₁), T₈ (20kg Humic acid fed^-1+T₁), T₉(40 kg Humic acid fed^-1+T₁ ), T₁₀ (60 kg Humic acid fed^-1+T₁ )

Table (6): Egyptian clover yields fed^-1 (fresh, dry, seed and straw) as affected by different rates of soil amendments in both seasons and combined.

Treatments	Fresh yield (tonfed^-1)				Dry yield (tonfed^-1)				Seed yield/fed (kg fed^-1)	Straw yield (tonfed^-1)
Treatments	1^st cut	2^nd cut	3^rd cut	Total cuts	1^st cut	2^nd cut	3^rd cut	Total cuts	Seed yield/fed (kg fed^-1)	Straw yield (tonfed^-1)
Season 2016/2017
Different rates of soil amendments
T1	6.16	7.29	7.11	20.56	0.90	1.20	1.64	3.73	168.01	0.81
T2	7.64	8.57	8.56	24.77	1.11	1.44	1.93	4.48	205.11	0.95
T3	8.14	9.31	9.18	26.63	1.16	1.51	2.10	4.77	216.07	1.00
T4	8.42	10.43	10.01	28.86	1.21	1.68	2.31	5.20	265.11	1.19
T5	7.35	8.44	8.41	24.20	1.09	1.41	1.93	4.43	187.11	0.88
T6	7.94	9.02	8.89	25.85	1.15	1.47	2.03	4.65	210.04	0.97
T7	8.18	9.52	9.40	27.10	1.22	1.55	2.14	4.91	245.14	1.10
T8	7.84	9.47	9.36	26.67	1.11	1.51	2.11	4.73	233.08	1.03
T9	8.35	9.89	9.65	27.89	1.18	1.59	2.17	4.94	241.14	1.12
T10	9.18	11.41	11.21	31.80	1.28	1.78	2.47	5.52	278.05	1.24
L.S.D at 0.05	0.27	0.38	0.28	1.07	0.04	0.05	0.02	0.20	7.37	0.04
Season 2017/2018
T1	6.26	7.35	7.16	20.73	0.96	1.25	1.72	3.93	160.07	0.77
T2	7.73	8.83	8.63	25.19	1.16	1.49	2.08	4.73	212.01	0.98
T3	8.35	9.44	9.21	27.00	1.21	1.58	2.22	5.01	225.04	1.03
T4	8.65	10.65	10.21	29.51	1.27	1.66	2.34	5.26	247.35	1.13
T5	7.55	8.72	8.63	24.90	1.13	1.47	2.09	4.69	198.07	0.96
T6	8.04	9.27	9.01	26.32	1.21	1.56	2.19	4.95	205.14	1.00
T7	8.47	9.76	9.58	27.81	1.27	1.64	2.34	5.25	238.03	1.08
T8	8.11	9.23	9.45	27.10	1.18	1.49	2.18	4.85	228.10	1.04
T9	8.55	9.91	9.76	28.22	1.22	1.58	2.44	5.24	239.01	1.09
T10	9.25	11.54	11.35	32.14	1.50	1.86	2.61	5.76	280.21	1.25
L.S.D at 0.05	0.37	0.41	0.29	1.03	0.05	0.06	0.06	0.23	6.54	0.04
Combined over seasons
T1	6.21	7.32	7.14	20.67	0.93	1.22	1.68	3.83	164.04	0.79
T2	7.89	8.70	8.60	25.19	1.13	1.47	2.01	4.61	208.56	0.97
T3	8.25	9.38	9.20	26.83	1.19	1.54	2.16	4.89	220.56	1.02
T4	8.54	10.54	10.11	29.19	1.24	1.63	2.38	5.23	256.23	1.16
T5	7.45	8.58	8.52	24.55	1.11	1.44	2.01	4.56	192.59	0.92
T6	7.99	9.15	8.95	26.09	1.18	1.51	2.11	4.80	207.59	0.99
T7	8.33	9.64	9.49	27.46	1.25	1.60	2.24	5.08	241.59	1.09
T8	7.98	9.35	9.41	26.74	1.15	1.50	2.15	4.79	230.59	1.04
T9	8.45	9.90	9.71	28.06	1.20	1.62	2.26	5.09	240.08	1.11
T10	9.22	11.48	11.28	31.98	1.29	1.82	2.54	5.64	279.13	1.25
L.S.D at 0.05	0.28	0.43	0.27	1.21	0.04	0.06	0.09	0.22	7.98	0.04

T₁(recommended NPK); T₂(2ton compost fed^-1+T₁);T₃(4ton compost fed^-1+T₁);T₄(6ton compost fed^-1+T₁); T₅ (2ton Gypsum fed^-1+T₁);T₆ (4ton Gypsum fed^-1+T₁); T₇ (6ton Gypsum fed^-1+T₁); T₈ (20kg Humic acid fed^-1+T₁); T₉(40 kg Humic acid fed^-1+T₁ ); T₁₀ (60 kg Humic acid fed^-1+T₁ )

12 Egypt. J. of Appl. Sci., 35 (3) 2020

Data in Table (6) revealed that seed and straw yields fed^-1 were significantly affected by soil amendments rates in both seasons and combined.

Concerning, seed yield fed^-1 and straw yield fed^-1, data revealed that the highest in combined, amendments rates significantly increased Egyptian clover seed yield was more evident when Egyptian clover was applied at 60kg fed^-1 of humic acid+ recommended NPK. Egyptian clover seed yield fed^-1 of this treatment was 70.16% of the control treatment, followed by compost at a rate of 6 ton fed^-1 + recommended NPK (56.20%), followed by gypsum at a rate of 6 ton fed^-1 + recommended NPK (47.28%). The increasing in Egyptian clover seed yield is mainly due to increase a rate of amendments (humic acid, compost and gypsum) which improved soil properties and nutritional status even under soil salinity (Raafat and Tharwat, 2011).

Concerning straw yield fed^-1, data revealed that applying amendments by different rates significantly increased straw yield fed^-1 as shown in Table (6) either in both seasons or in combined. Data revealed that Egyptian clover straw yield was related to fresh and dry yield. The highest straw yield fed^-1 was obtained under applying 60 kg of humic acid + recommended NPK followed by 6 ton compost+ recommended NPK followed by 6 ton gypsum+ recommended NPK. Straw yield out yielded the control treatment by 58.23, 46.84 and 37.97% respectively, in combined. Similar results were obtained with Gamal et al. (2002) Edris et al. (2003) and Bakhoum et al. (2016).

Macro and micronutrients concentration in clover plants.

Data in Table (7) show that the effect different rates of soil amendments application on macronutrients concentrations in Egyptian clover in both seasons as well as combined. The increases of soil amendments rates led to increasing of N, P and K concentration in Egyptian clover plants. The highest mean values of N, P and K concentration in Egyptian clover plants for soil treated with humic acid followed by compost and gypsum respectively. The effect of different rates of soil amendments on N, P and K concentration in Egyptian clover plants were significant increases with the increasing soil amendments rates. The relative increases of mean three cuts were 23.60, 16.40 and 10.80 % for humic acid, compost and gypsum, respectively in combined of N, 28.95, 23.68 and 18.42 % of P and 15.55, 13.43 and 9.89 % of K for humic acid, compost and gypsum, respectively concentrations in Egyptian clover plants as affected at high rate+ recommended NPK compared control.

Egypt. J. of Appl. Sci., 35 (3) 2020 13

From these results could be the highest mean values of N, P and K concentration in Egyptian clover plants were soil treated with humic acid amendment+ recommended NPK compared with control. From results it cloud be the relative increases of mean macronutrients concentration in cuts Egyptian clover arranged order: Humic acid > compost > gypsum for N, P and K. These results are in agreement with those obtained by El-Galad et al. (2013) who indicated that the N, P and K concentration in faba bean plants were significantly affected compost application in both seasons. This might be related to improvement in physical conditions of the soil and the provided energy for microorganism activity and increase the availability and content of N, P and K. Turan et al. (2011) reported that humic acid had positive increase of the N, P and K. Mazhar et al. (2011) suggested that the effect of compost application on N, P and K concentrations were increased by increasing compost rate. Jena and Kabi (2012) found that the application of gypsum to soil salinity led to decreased soil pH and increases the availability of nutrients in the soil and esential plant nutrients content.

With respect micro nutrients the different rates of soil amendments were significant increasing of Fe, Mn and Zn concentration in Egyptian clover plants (Table 7) in combined. The relative increases of the highest values were 21.19, 15.85 and 19.17% for Fe, Mn and Zn concentration in clover plants respectively were obtained with 60 kg humic acid fed ^-1 + recommended NPK compared control. On the other hand, the relative increases were 19.06, 14.29 % and 13.52% for Fe, Mn and Zn concentration in clover plants, respectively, were obtained with 6 ton compost+ recommended NPK compared control. As well as, the relative increases of highest values Fe, Mn and Zn concentrations in clover plants were 15.07 for Fe, 12.65 for Mn and 9.25% Zn, respectively were obtained with 6 ton gypsium + recommended NPK compared control. These results are in agreements with Helmy et al. (2013) they ravealed that the application of humic acid to saline soil led to increases of Fe, Mn and Zn uptake in barley plants. The application of humic acid different rates significantly increased Fe, Mn and Zn contents of shoot of pepper seedling, Mesut et al. (2010). Turan et al. (2011) indicated that humic acid had positive impacts on dry weight and the Fe, Mn and Zn uptake of maize plants. Valtcho et al. (2006) found that the gypsum application led to increases of Fe, Mn and Zn uptake in clover plants.

14 Egypt. J. of Appl. Sci., 35 (3) 2020

Table (7): Macronutrients (%) and micronutrients (mg/kg) of Egyptian clover as affected by different rates of soil amendments over cuts.

Characters Treatments	Macronutrients (%)			Micronutrients (mg/kg)
Characters Treatments	N	P	K	Fe	Mn	Zn
Season 2016/2017
Different rates of soil amendments
T1	2.52	0.36	2.77	64.32	35.87	19.75
T2	2.66	0.41	2.87	68.52	39.80	21.45
T3	2.79	0.44	2.93	74.77	40.95	22.98
T4	2.93	0.46	3.05	76.43	42.69	23.51
T5	2.62	0.35	2.80	67.62	38.75	20.37
T6	2.66	0.41	2.86	71.89	40.22	21.40
T7	2.75	0.44	2.94	74.62	41.69	22.18
T8	2.72	0.42	2.88	70.65	40.61	21.63
T9	2.86	0.45	2.96	75.84	41.23	22.61
T10	3.13	0.48	3.14	77.95	43.59	25.10
L.S.D 0.05	0. 08	0.02	0.04	0.86	0.59	0.42
Season 2017/2018
T1	2.48	0.39	2.88	66.52	39.85	22.41
T2	2.62	0.42	3.10	71.85	41.88	23.68
T3	2.72	0.45	3.26	76.49	42.69	24.16
T4	2.89	0.47	3.36	79.34	43.85	24.34
T5	2.59	0.39	2.95	70.54	39.95	22.61
T6	2.63	0.43	3.14	72.69	42.31	23.41
T7	2.79	0.46	3.27	75.94	43.62	23.88
T8	2.75	0.40	3.12	73.29	42.16	23. 95
T9	2.82	0.44	3.31	76.56	43.19	24.41
T10	3.05	0.50	3.39	80.61	44.12	25.14
L.S.D 0.05	0.06	0.02	0.05	0.74	0.78	0.32
Combined over seasons
T1	2.50	0.38	2.83	65.42	37.86	21.08
T2	2.64	0.42	2.99	70.19	40.84	22.57
T3	2.76	0.45	3.12	75.63	41.82	23.70
T4	2.91	0.47	3.21	77.89	43.27	23.93
T5	2.61	0.37	2.88	69.08	39.35	21.49
T6	2.65	0.42	3.00	72.29	41.27	22.41
T7	2.77	0.45	3.11	75.28	42.66	23.03
T8	2.74	0.41	3.00	71.97	41.39	22.79
T9	2.84	0.46	3.11	76.20	42.21	23.38
T10	3.09	0.49	3.27	79.28	43.86	25.12
L.S.D 0.05	0.08	0.04	0.06	0.82	0.48	0.21

T₁(recommended NPK); T₂(2ton compost fed^-1+T₁);T₃(4ton compost fed^-1+T₁);T₄(6ton compost fed^-1+T₁); T₅ (2ton Gypsum fed^-1+T₁);T₆ (4ton Gypsum fed^-1+T₁); T₇ (6ton Gypsum fed^-1+T₁); T₈ (2 kg Humic acid fed^-1+T₁); T₉(4kg Humic acid fed^-1+T₁ );T₁₀ (6 kg Humic acid fed^-1+T₁ )

Economic evluation:

Data presented in Table (8&9) revealed that applying soil amendments significantly effected on gross income (G1), gross margin (GM) and benefit/ cost ratio (B/C) in combined seasons, whereas total cost (TC) was not significantly affected in combined seasons. Data revealed that increasing humic acid from 20,40, 60 kg fed^-1 as well as combost or gypsium from 2, 4, 6 ton fed^-1 these traits gradually increased compared with control treatments in combined seasons. The heighest values (26951.15, 15551.15and 1.36L.E fed^-1) for GI,GM and B/C, respectively in the combined season were obtained with humic acid at a rate of 60kg fed^-1+ recommended NPK. Compost at a rate of 6 ton fed^-1+ recommended NPKoccupied the second ranked followed by gypsium at a rate of 6 ton fed^-1+ recommended NPK in both seasons. on the other hand , control treatment T1 (recommended NPK ) showed the lowest values (16792.80, 5632.80 and 0.50) for GI, GM and B/C respectively in the combined season for these traits, respectively. These results were related to increase in Egyptian clover yields (fresh,straw and seed) because of applying soil amendments i.e. compost, gypsium or humic acid and humic acid was a superiority than compost or gypsium as amendment in salt soil.

Egypt. J. of Appl. Sci., 35 (3) 2020 15

Table (8): The cost of production inputs

Treatments Cost of production inputs	T1	T2	T3	T4	T5	T6	T7	T8	T9	T10
Land preparation :
Tillage	500	500	500	500	500	500	500	500	500	500
Panting	300	300	300	300	300	300	300	300	300	300
Seeds	700	700	700	700	700	700	700	700	700	700
Irrigation	500	500	500	500	500	500	500	500	500	500
Land rent	7000	7000	7000	7000	7000	7000	7000	7000	7000	7000
Mineral fertilization:
Superphosphate (15.5%P₂O₅)	240	240	240	240	240	240	240	240	240	240
Ammonium nitrate(33.5%N)	220	220	220	220	220	220	220	220	220	220
potassium sulfate (48% K₂O)	500	500	500	500	500	500	500	500	500	500
compost fed^-	------	600	1200	1800	---	---	---	---	---	---
Gypsum fed^-1	-----	---	---	---	260	520	780	---	---	---
Humic acid fed^-1	---	---	---	---	---	---	---	80	160	240
Hoeing	400	400	400	400	400	400	400	400	400	400
Harvesting	800	800	800	800	800	800	800	800	800	800
Total variable cost	11160	11760	12960	14760	11420	11940	12720	11240	11320	11400
Price ton^-1(total fresh yield)	420	420	420	420	420	420	420	420	420	420
Price ton^-1 (Straw yield )	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000
Price kg^-1 (seed yield)	35	35	35	35	35	35	35	35	35	35

T₁(recommended NPK); T₂(2ton compost fed^-1+T₁);T₃(4ton compost fed^-1+T₁);T₄(6ton compost fed^-1+T₁); T₅ (2ton Gypsum fed^-1+T₁);T₆ (4ton Gypsum fed^-1+T₁); T₇ (6ton Gypsum fed^-1+T₁); T₈ (20 kg Humic acid fed^-1+T₁); T₉(40kg Humic acid fed^-1+T₁ );T₁₀ (60 kg Humic acid fed^-1+T₁ )

16 Egypt. J. of Appl. Sci., 35 (3) 2020

Table (9): Combined over seasons means of economic parameter

Trea.	Total fresh yield (ton fed^-1)	Straw yield (tonfed^-1)	Seed yield (kg fed^-1)	GI	T C	GM	B/C
T1	20.67	0.79	164.04	16792.80	11160	5632.80	0.50
T2	25.19	0.97	208.56	20789.40	11760	9029.40	0.77
T3	26.83	1.02	220.56	22048.20	12960	9088.20	0.70
T4	29.19	1.16	256.23	24707.85	14760	9947.85	0.67
T5	24.55	0.92	192.59	19811.65	11420	8391.65	0.73
T6	26.09	0.99	207.59	21193.45	11940	9253.45	0.77
T7	27.46	1.09	241.59	23258.85	12720	10538.85	0.83
T8	26.74	1.04	230.59	22421.45	11240	11181.45	0.99
T9	28.06	1.11	240.08	23518.00	11320	12198.00	1.08
T10	31.98	1.25	279.13	26951.15	11400	15551.15	1.36
L.S.D 0.05	2.149	0.064	9.308	1171	NS	1171	0.011

T₁(recommended NPK); T₂(2ton compost fed^-1+T₁);T₃(4ton compost fed^-1+T₁);T₄(6ton compost fed^-1+T₁); T₅ (2ton Gypsum fed^-1+T₁);T₆ (4ton Gypsum fed^-1+T₁); T₇ (6ton Gypsum fed^-1+T₁); T₈ (20 kg Humic acid fed^-1+T₁); T₉(40kg Humic acid fed^-1+T₁ );T₁₀ (60 kg Humic acid fed^-1+T₁ )

CONCLUSION

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تاثیر ًبعض محسنات التربه على انتاجیه البرسیم المصرى

وتقیمه اقتصادیا تحت ظروف السرو

عزه خلیل محمد سالم⁽¹⁾وسـعید محمد حسین علی عیسى⁽²⁾

1-قسم بحوث محاصیل العلف- معهد بحوث المحاصیل الحقلیة- مرکز البحوث الزراعیة - بالجیزة

2-قسـم بحـوث التقییم الإقتصادی والبیئی - المعمل المرکزی لبحوث التصمیم والتحلیل الإحصائی - مرکز البحوث الزراعیة - بالجیزة

أجریت تجربتان حقلیتان فى محطة البحوث الزراعیه بالسرو-مرکز البحوث الزراعیه- محاقظه دمیاط –مصر خلال موسمى -2018/2017, 2017/2016 على التوالى لدراسة تاثیر بعض معدلات محسنات التربه (کمبوست–جبس الزراعى–حمض الهیومیک) على انتاجیه البرسیم المصرى وتقیمه اقتصادیا و قد أضیفت للفدان معدلات 6,4,2 طن/ فدان لکل من الکمبوست و الجبس الزراعى, 60,40,20 کیلو جرام من حمض الهیومیک و استخدم تصمیم القطاعات الکاملة العشوائیة فى ثلاثة مکررات.

وأظهرت النتائج ما یلى :-

- زادت محسنات التربه بعض الصفات المحصولیه للبرسیم مثل طول النبات ونسبه الورق للسیقان وعدد الکبسولات /م2 ووزن 1000 بذره, و سجل المعامله 60 کجم/ فدان حمض هیومیک+NPK الموصى به أعلى القیم لهذه الصفات.

- زادت النسب المئویه لکل من البروتین الخام و المهضوم نتیجه لإضافه محسنات التربه فى الأراضى الملحیه وفى نفس الوقت قلت النسبه المئویه للألیاف.

- زادت حاصلات البرسیم المصرى (الأخضر- الجاف- محصول البذره- محصول القش) بإضافه محسنات التریه و سجل المعدل 60کجم/ فدان من حمض الهیومیک+NPK الموصى به أعلى القیم لهذه الحاصلات کمتوسط عام للموسمین.

- أدى إضافه الکمبوست والجبس الزراعى وحمض الهیومک الى زیاده النسبه المئویه للعناصر الکبرى والعناصر الصغرى فى نباتات البرسیم المصرى مقارنةً بالکنترول وسجل معدل 60 کجم/ فدان من حمض الهیومیک+NPK الموصى به أعلى القیم لهذه العناصر للسنتین.

- کما سجلت النتائج ان افضل معاملة (60 کجم/ فدان من حمض الهیومیک+NPK الموصى به) التى حققت اعلى نسیه منافع الى التکالیف والتى بلغت 1.36

References

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18 Egypt. J. of Appl. Sci., 35 (3) 2020

Edris, A.E; S. Ahmed and H.M. Fadel (2003). Effect of organic agriculture

practices on the volatile aroma components of some essential oil plants growing in Egypt sweet marjoram (Origanum marjorana L.) essential oil Flavour Fragr. J., 4: 345-51.

El-Nahrawy, M.A.Z. (2005). The vital role of Egyptian clover in agriculture. The 11^th Conference of Agronomy, Agron. Dept. Fac. Agric. Asut. Univ., Egypt. 55-62.

Gamal, M.A S; A. I. Safwat; and S. A. Salah (2002). Egyptian clover varieties to the interaction of mineral and bio phosphatic fertilization. Fayoum

Heady, E.O. and J. L. Dillon (1961) Agricultural production functions. Log card number : 60-11128, Iwoa State University Press.

Egypt. J. of Appl. Sci., 35 (3) 2020 19

Humintech. (2012).http://humintech.com/001/agriculture/ information/ general.html

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Mcdonald, J. E. ; D.P. Fuller ; T.K. Fuller and J.E. Cardoza (1994). The influence of food abundance on success of Massachusetts black bear hunters. Northeast Wildlife. 51:55–60.

Mesut, K. C.; T. Ondr; T. Metin and T. Burcu (2010). Phosphorus and humic acid application alleviate salinity stress of pepper seedling. African J. of Biotoechnology. 9 (36): 5845- 5851.

20 Egypt. J. of Appl. Sci., 35 (3) 2020

Nardi, S.; D. Pizzeghello; A. Muscolo; and A.Vianello (2002). Physiological effects of humic substances on higher plants. Soil Biol. Biochem. 34, 1527–1536.

Panuccio, M.R.; A. Muscolo and S. Nardi (2001). Effect of humic substances on nitrogen uptake and assimilation in two species of Pinus.Journal of Plant Nutrition 24(4-5):693-704

Read, J.J.; G. E. Brink; S. Mclaughlin and K.R. Stani (2011). Nitrogen and Winter Cover Crop Effects on Spring and Summer Nutrient Uptake. Grass and Forage Science, 66: 381-390.

Romero, L.M.; S.A.Trindad; E.R.Garccia and C.R.Ferrera(2000).Yield of potato and soil microbial biomass with organic and mineralfertilizers. Agrociencia.34:261-269.

Egypt. J. of Appl. Sci., 35 (3) 2020 21

Sayed, M.R. I. and Kh. A. Shaban (2016). Response of fahl clover to compost rates under irrigation intervals in newly reclaimed saline soils. Annals of Agric. Sci., Moshtohor . 54 (4), 827-840.

Sebastiano, D ;T. Roberto ; D. Ersilio and AArturo A. lvino (2005). Effect of foliar application of N and humic acids on growth and yield of durum wheat. Agron. Sustain. Dev. 25 (2):183 – 191.

Sharma, B. R. and P. S. Minhas (2005). Strategies for managing saline/alkali waters for sustainable agricultural production in South Asia. Agric. Water Manag., 78, 136-151.

Shrivastava, P.; R. Andrew kumar (2015). Soil salinith Aserious environmental issue and plant growth promoting bacteria as one of the tools for its alleviation. Sandi.j.Biol.Sci. 22,123-131.

Snedecor, G.W. and W.G. Cochran (1990). Statical Methods. 8th Edition, Iowa State Univ. Press, Ames.

Vendrame, A.W.; I.Maguire and K.K.Moore (2005).Growth of selected bedding plants as affected by different compost percentages. Proc.Fla.State Hort. Soc.118:368-371

22 Egypt. J. of Appl. Sci., 35 (3) 2020

Zaka, M. A.; F. Mujeeb ; G. Sarwar ; N.M. Hassan and G. Hassan (2003). Agromelioration of Saline Sodic Soils. On Line J. Biol. Sci., 3(3): 329-334.

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