Effects of Sowing Date,Density and Fertilizer Levels on Agronomic Traits and Yield of Soybean in Soybean and Maize Composite Planting
To screen the best cultivation measures for soybean-maize intercropping,the effects of sowing date,density and fertilizer application rate on main traits and yield of soybean were studied by three-factor and three-level orthogonal test.The results showed that choosing fresh corn and soybean compound planting enabled soybeans to have a long photoperiod after corn harvest;increasing plant height,number of nodes in the main stem,number of effective pods per plant,number of grains per plant,100-grain weight,and grain weight per plant had a facilitating effect on soybean yield,while the number of grains per plant,grain weight per plant,and hundred-grain weight had a decisive effect on the yield.Condensation analysis showed that cultivation with sowing period from April 30 to May 10,density of 210000-240000 plants/hm2,and fertilizer application rate of 300-375 kg/hm2 could obtain higher yield.
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