种植密度对大豆光合生理及产量的影响

采用二因素裂区试验,以9个大豆稳定品系为材料,研究了种植密度对大豆光合生理及产量的影响.结果表明:种植密度影响大豆的光合特性及干物质积累,最终影响产量,种植密度在36～50万株·hm~(-2)范围内,随着密度的增加,大豆的光合生理指标提高,进而增加了大豆的产量,但当密度增加到50万株·hm~(-2)时,大豆的增产幅度降低.

Effects of Plant Density on Photosynthetic Characteristics and Yield of Soybean

Reasonable close planting was the premise to optimize group structure and increase high yield of soybean. In this experiment, nine soybean genotypes were researched to find out the response of photosynthetic physiology and yield of soybean to different density, through the split plot design for two factors. The results showed plant density had certain influences on photosynthetic characteristics,dry matter accumulation and yield of soybean. Under planting density of 3. 6 × 10~5-5 × 10~5 plant·hm~(-2), the photosynthetic indexes and yield of soybean were increased with the increasing density. But when the planting density was up to 5 × 10~5 plant·hm~(-2) ,the yield increasing range of soybean was lower.