STUDIES ON THE EFFECT OF IRRIGATION INTERVALS, BIO AND CHEMICAL FERTILIZATION ON ROSEllE PLANT PRODUCTIVITY | ||
| Journal of Plant Production | ||
| Article 13, Volume 28, Issue 5, May 2003, Pages 3972-3945 PDF (1.19 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2003.243299 | ||
| Author | ||
| Laila M. Helmy, | ||
| Department of Horticulture, Faculty of Agriculture, Aln Shams University, Shoubr. EI-Khelma, Cairo, Egypt | ||
| Abstract | ||
| Two field experiments were carried out al the Experimental Farm of Faculty of Agriculture. Ain Shams University, Egypt during the two seasons of 1999 and 2000 to investigate the effect of Irrigation intervals and different fertilization sources on \he growth, yield and chemical constituents of roselle plants. Three irrigation intervals, i.e. Irrigation every 1, 2 and 3 weeks were applied in C'.ombinatlon with 4 mixtures of chemical and bio-fertilizers which were as follows: Fun dose of NPK-recommended rate: 150 kglfed. ammonium sulphate 0.5%) + 200 kglfe(t calcJum superphosphate (15.5%) + 150 kglfed. potassium sulphate (48%). 50'10 NPK-recommended rate + 4 kglfed. biogen. 50% NPK-recommended rate -+ 4 kg/fed. phosphorin. 50'10 NPK-recommende<l rate + 4 kglfed. biogen + 4 kglfed. phosphorin. The obtained results Indicated that, the treatment irrigated every 1 '1"8ek and fertilized with 50% NPK-recommended rate + biogen + phosphorin produced the highest values of plant height, number of branches and fnits/plant, fresh ~ighlJ of fruits and sepals glplant, sepals dry weight (glplant or kglfed.), seed yield (gJplant or tonlfed.), anthocyanin content as well as N, P and K contents In both seasons. The lowest pH values (which caused the highest acidity), the highest T.S.S a~ fixed oil percentages were obtained from the treatment Irrigated every 3 weeks a"'l fertilized with half dose of NPK·recommended rate combined with both blofertilizers in both seasons. The treatment irrigated every 2 weeks and fertilized with 500/. NPK- recommended rate combined with both biofertilizers produced the high t fixed oil yield glplant and kglfed. in both seasons. | ||
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