Effect of Different Row Spacing on Yield of Soybean-corn Belt Composite Cultivation
Soybean-corn belt composite cultivation can effectively improve the utilization rate of limited arable land resources,enhance the compatible and coordinated growth of corn and soybeans,and address the"land competition"between soybeans and corn.This study analyzes the effects of different row spacing patterns on yield in soybean-corn composite cultivation model,in order to provide a theoretical basis for the promotion and application of soybean maize intercropping patterns.under the"2+3"mode of soybean-corn belt composite planting,fixed plant and row spacing of corn,fixed plant spacing of soybeans,and vary soybean-corn spacing and soybean row spacing were set to investigate the agronomic traits and yields of soybeans and corn.The results indicated that with increased soybean-corn spacing and soybean row spacing,there were more effective branches,more pods per plant,and more grains per plant for soybeans.The maize had longer ear length,greater ear diameter,heavier ear weight,longer barren tip,and more kernels per row,but the agronomic traits did not differ significantly among differen treatments.The lower the planting density of soybean and corn,and the fewer the number of harvest plants.With a soybean hole spacing of 21 cm,row spacing of 30 cm,maize plant spacing of 18 cm,row spacing of 40 cm,and soybean-corn spacing of 70 cm,i.e.,2.4 m per 1 unit in a soybean-maize"3+2"composite planting mode,both soybean and corn yields were maximized,showing a significant difference compared to the other 3 treatments.
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