EFFECT OF PLANT DENSITY ON SOME SOYBEAN CULTIVARS UNDER TWO PLANTING DATES | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 22, Volume 80, Issue 1, March 2002, Page 275-291 PDF (4.32 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2002.304223 | ||||
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| Authors | ||||
| KAMEL A. EL-DOUBY1; SAED H. MANSOUR2; ABDEL-HAFEZ A. ZOHRY1 | ||||
| 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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