Effects of Cultural Practices on Yield and Agronomic Traits of Soybean cv.Zhoudou 19

Field split-split plot design was adopted to investigate the effect of fertilization,planting density and chemical regulation method on agronomic traits and yield of soybean cv.Zhoudou 19.Plant height,pods per plant,seed weight per plant increased with the increasing of fertilizing times.With the increasing of planting density,bottom pod height and plant height increased,while branches,pods per plant,seeds per plant,seed weight per plant and 100-seed weight decreased.Chemical regulation remarkably decreased plant height and bottom pod height and had no influence on main stem nodes.Seed yield increased with the increasing of fertilizing times,and showed increase and then decrease trend with the increment of planting density.The highest yield of 3 487.9 kg·ha-1 was obtained under 600 kg·ha-1 basic fertilizer and twice foliar fertilizer spraying at the planting density of 3.0×105 plants·ha-1,without chemical regulation.