Influences of Different Sowing Dates and Planting Densities on the Yield and Yield-related Traits of Zheqiudou No.3

[Objective]The purpose of the study was to realize the high-yield and high efficient cultivation of Zheqiudou No.3.[Method]The influences of different sowing dates and planting densities on the yield and yield-related traits of Zheqiudou No.3 were studied through the field experiment carried out in Hengjie farm.[Result]The whole growth periods of Zheqiudou No.3 sowed on Jul.5th,Jul.20th and Aug.4th were 94,87 and 77 d resp.The influences of 2 planting densities and their interactions with sowing dates on the plant height,node numbers of main stem and effective branch number of Zheqiudou No.3 were not significant.The differences of plant height,node numbers of main stem and effective branch number among different sowing dates were extremely significant.With the same planting density,the yield of Zheqiudou No.3 sowed early was higher than that of Zheqiudou No.3 sowed late.With the same sowing date,the yield of Zheqiudou No.3 planted densely was extremely higher than that of Zheqiudou No.3 planted rarely.The yield of early sowing and densely planting Treatment A1B2 was highest,being up to 3 416.7 kg/hm~2.The yield of Treatment A1B1 was secondary,being 2 983.35 kg/hm~2.The yield of late sowing and rarely planting Treatment A3B1 was lowest,being only 1 383.30 kg/hm~2.[Conclusion]Early sowing and densely planting could extremely enhance the yield and benefit of Zheqiudou No.3.