Studies on the Relationship Between Yield and Leaf Area Index and Their Dry Matter Accumulation in Black Soybean

The relationship between yield and leaf area index and their dry matter accumulation were studied by using two black soybean cultivars which have high yield potency,under different fertilizer levels.This experiment showed that: The dry weight,leaf area index and yield of all varieties were higher than CK under fertilizer levels,the correlation coefficients of yield with the leaf area index were tending to positive correlation in before flowering stage and was significant in pod stage;the correlation coefficients of yield with dry weight were tending to positive correlation in pod stage.Maintaining a high leaf area index can increase the corresponding dry matter accumulation,a few pods and grains between before flowering stage and pod stage,selection of fine varieties supplemented with high-yield cultivation measures that get a higher yield.