ISHS Acta Horticulturae 143: VIII African Symposium on Horticultural Crops
NITROGEN AND PHOSPHORUS FERTILIZATION IN RELATION TO SEED PRODUCTION IN ONION ALLIUM CEPA L. |
| Authors: | I.H. Ahmed, A.A. Abdalla |
| Abstract:
Field experiments conducted over two successive seasons (1973/74 and 1974/75) at the Faculty of Agriculture research farm at Shambat, showed that nitrogen application had significantly increased plant height, flower stalk thickness and seed yield, but had no significant effect on percent effective florets, seeds per capsule or seed size. The increase in seed yield due to nitrogen application was mainly due to the highly significant increase in the number of florets produced per seed-heads. Phosphorus fertilization in absence of nitrogen had no significant effect on seed yield. However, a highly significant increase in seed yield was obtained when phosphorus was used in combination with nitrogen. Nitrogen and phosphorus separately or in combination proved to have no effect on the number of branches or flower-stalks produced per plant. | |
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