Changing Low of Limited Branching Type,Dwarf and Dense-resistant soybean under Different Densities
YUAN Ming-hao et al(Jilin Agricultural Science and Technology University,Jilin,Jilin 132101)
[Objective] The aim was to study the change of yield components of limited branching type,dwarf and dens-resistant soybean under different densities.[Method] With Jimi soybean No.1 as the material,8 densities(15×104,23×104,31×104,36×104,39×104,42×104,47,55 ×104 plant/hm2) were designed to study dry matter accumulation,economic index,longitudinal distribution of pod and seed in different treatments.[Result] The relationship of yield and density of Jimi soybean No.1 fitted the function of Y=-2.697X2+208.884X+1 130.584.When the density was 31×104-42×104 plant/hm2,the yield of Jimi soybean was higher and when the density was 39 ×104 plant/hm2 its yield was the highest with economic index of 0.261.With the increase of density,yield per plant,pod per plant,grain per plant,branch number and pod number per branch all showed decreasing trend,and the pod number in middle and low layer significantly decreased,but the pod number of stem had no obvious change.The grain number per pod and 100-grain weight had no obvious correlation with density.[Conclusion] With the increase of density,the pod setting of Jimi soybean was dominant by upper lay,pod setting by stem and branch was considered at the same time.
【CateGory Index】： S565.1