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 3.6×105-5×105 plant·hm-2,the photosynthetic indexes and yield of soybean were increased with the increasing density.But when the planting density was up to 5×105 plant·hm-2,the yield increasing range of soybean was lower.