Helmy,, L. (2003). STUDIES ON THE EFFECT OF IRRIGATION INTERVALS, BIO AND CHEMICAL FERTILIZATION ON ROSEllE PLANT PRODUCTIVITY. Journal of Plant Production, 28(5), 3972-3945. doi: 10.21608/jpp.2003.243299
Laila M. Helmy,. "STUDIES ON THE EFFECT OF IRRIGATION INTERVALS, BIO AND CHEMICAL FERTILIZATION ON ROSEllE PLANT PRODUCTIVITY". Journal of Plant Production, 28, 5, 2003, 3972-3945. doi: 10.21608/jpp.2003.243299
Helmy,, L. (2003). 'STUDIES ON THE EFFECT OF IRRIGATION INTERVALS, BIO AND CHEMICAL FERTILIZATION ON ROSEllE PLANT PRODUCTIVITY', Journal of Plant Production, 28(5), pp. 3972-3945. doi: 10.21608/jpp.2003.243299
Helmy,, L. STUDIES ON THE EFFECT OF IRRIGATION INTERVALS, BIO AND CHEMICAL FERTILIZATION ON ROSEllE PLANT PRODUCTIVITY. Journal of Plant Production, 2003; 28(5): 3972-3945. doi: 10.21608/jpp.2003.243299
STUDIES ON THE EFFECT OF IRRIGATION INTERVALS, BIO AND CHEMICAL FERTILIZATION ON ROSEllE PLANT PRODUCTIVITY
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:
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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