EL-DOUBY, K., MANSOUR, S., ZOHRY, A. (2002). EFFECT OF PLANT DENSITY ON SOME SOYBEAN CULTIVARS UNDER TWO PLANTING DATES. Egyptian Journal of Agricultural Research, 80(1), 275-291. doi: 10.21608/ejar.2002.304223
KAMEL A. EL-DOUBY; SAED H. MANSOUR; ABDEL-HAFEZ A. ZOHRY. "EFFECT OF PLANT DENSITY ON SOME SOYBEAN CULTIVARS UNDER TWO PLANTING DATES". Egyptian Journal of Agricultural Research, 80, 1, 2002, 275-291. doi: 10.21608/ejar.2002.304223
EL-DOUBY, K., MANSOUR, S., ZOHRY, A. (2002). 'EFFECT OF PLANT DENSITY ON SOME SOYBEAN CULTIVARS UNDER TWO PLANTING DATES', Egyptian Journal of Agricultural Research, 80(1), pp. 275-291. doi: 10.21608/ejar.2002.304223
EL-DOUBY, K., MANSOUR, S., ZOHRY, A. EFFECT OF PLANT DENSITY ON SOME SOYBEAN CULTIVARS UNDER TWO PLANTING DATES. Egyptian Journal of Agricultural Research, 2002; 80(1): 275-291. doi: 10.21608/ejar.2002.304223
EFFECT OF PLANT DENSITY ON SOME SOYBEAN CULTIVARS UNDER TWO PLANTING DATES
1Crop Intensification Research Section, Field Crops Research Institute, Agricultural Research Center, Giza, Egypt
2Food Legumes Research Section, Field Crops Research Institute, Agricultural Research Center, Giza, Egypt
Abstract
A field experiment was conducted at Zarzoora Agricultural Re-search Station, EL-Beheira govemorate during 1999 and 2000 seasons to study the effect of five plant densities (70000. 105000, 140000. 175000 and 210000 plants/ fed ) on three soybean cultivars (3.35 , L. G.111 and Crawford ) under two sowing dates (May 151 and May 2595). The experimental design was spilt-spilt plot with three replications The main results of this work could be summarized as follows : 1. Early planting on May 151 significantly increased plant height, weight of pods and seeds/plant, weight of 100 seeds, seed, oil and protein yields/ fed, but decreased seed crude protein percentage in both sea-sons. Differences in pods and seeds/plant as well as oil percentage were significant in one season. However, number of branches/ plant was not significantly affected by sowing date in both seasons. 2. Plant height, weight of seeds/plant, weight of 1® seeds, seed oil content and seed, oil and protein yields/fed in both seasons, number of pods and seeds/ plant and weight of pods/ plant in the first season only were significantly influenced by soybean cultivars, whereas num-ber of branches/ plant and seed protein content were not significantly affected in both seasons. 3. Plant height and protein content were significantly increased by in-creasing plant population density up to 210000 plants! fed. While seed yield/ fed as well as oil and protein yields were significantly increased with increasing density from 70000 up to 175000 plants/ fed in both seasons. All yield components an showed the opposite trend. 4. Planting date X soybean cultivar interaction significantly affected number of pods and seeds/ plant in the first season, weight of 100 seeds and seed oil % in both seasons. Interaction effects of planting date X plant density was significant on plant height, number of pods and seeds/ plant in one season, weight of 100 seed and seed oil % in both seasons. Plant height, number of branches/ plant and 100 seeds weight were significantly affected by the interaction between cultivar X plant density in the second season. None of the interactions had a significant effect on seed yielded in both seasons.
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