mentation of tivty through of CLOVER DIETS OF AND FEED illustrated that diets increases (Leng 1990 b) A a molasses-urea ENCE OF PARTIAL REPLACEMENT OF 6Y AMMONIATED RICE STRAW IN BASAL ATING FRIESIAN COWS. 1LK YIELD, BLOOD PARAMETERS EFFICIENCY OF LACTATING FRIESIAN COWS. | ||
| Journal of Animal and Poultry Production | ||
| Article 3, Volume 31, Issue 1, January 2006, Pages 119-130 PDF (3.71 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2006.235403 | ||
| Author | ||
| Eman H. M. | ||
| production Dept., Faculty of Agriculture, Mansoura University | ||
| Abstract | ||
| e effect of including ammoniated rice straw (ARS) to partia’ly replace clover n lactating cows rations on their performance, milk yield and composition as Dlood metabolites was investigated. Sixteen lactating Friesian cows with body size (BW°75, kg) ranging from of 103 to 121 kg were used in this animals were in the 2nd to 4th lactation season. Cows were randomly into four groups (four animals each) and were randomly assigned for the -zceimental diets. The experimental rations were formulated as follows: Rl: 50% corentrate feed mixture (CFM) + 50 % Clover hay (CH), R 2 : ration 2 CFM +10% CH+40 % ammoniated rice straw (ARS)., R 3: ration 3: 50 % ¿2% CH+30 % ARS., R 4 : ration 4 : 50 % CFM +50 % ARS. These s were chosen to achieve approximately isonitrogenous ration containing -15% CP. The experimental period lasted for 140 days (20 weeks). e obtained results showed that total protein concentration of blood serum was p < 0.05) 7.71 g/lOOml with Rl while lowest value (pc0.05) was noticed with gIlOGml), but the difference between R2 or R4 was not significant. Globulin tion was highest (p < 0.05) with Rl, while the lowest value (p < 0.05) was with and 2.8 g/lOOml, respectively), but the difference between R2or R4 was not t. The average daily fat corrected milk (FCM) yield was the highest (p < 0.05) fed Rl or R2 (16.77 and 18.47 kg/d, respectively) compared with the other The total solids (TS%), fat, lactose, protein, solids non fat (SNF%) and the (NEL Mcal/kg milk) were not significantly different among treatments. The n efficiency was improved with R2 (60.52%) compared with the other ones worst value was noticed with the R3 (52.7%). .The highest value of feed cost corded with Rl, but the lowest value with the R4. The highest value of the total s the price of (FCM) was recorded with feeding R2, but the lowest value was r.e R3. The results of return (profit L.E) , showed that the highest return was when R2 was fed followed by R4 and the lowest was with R 1. Substitution of nay by ammoniated rice straw at a level of at least 10% (DM basis) would adequate fermentable N, as well as fermentable fiber, and above this level of nay may not be necessary. The increase in DM intake when feeding on CH might have affected fiber digestion because of an increase in the rate of of digeste. The eNDF was higher when feeding on 10% clover hay + 40% nar. the other ones. Such substitution resulted in improving milk production, efficiency and economic efficiency. | ||
| Keywords | ||
| lactating cows; clover hay; ammoniated rice straw; milk yield | ||
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