春玉米+春大豆间作复合群体结构的优化

Study on optimization combination for intercropping spring corn with spring soybean

选择春玉米+春大豆间作的畦幅、春玉米种植密度、春大豆种植密度等3个因素,采用正交旋转组合设计,布置田间参数试验,针对春玉米+春大豆间作的总产量、春玉米产量、春大豆产量及净产值诸目标,分别建立相应的回归数学模型,并据此进行综合分析,获得了本试验条件下3个供试农艺因子的优化组合方案:春玉米+春大豆间作的畦幅2.50～2.80m,春玉米种植密度0.35～0.38万株/667m2,春大豆种植密度2.50～2.80万株/667m2。

The field experiment was conducted to determine optimization combination for intercropping spring corn with spring soybean. The experimental design was a three-factors (restbalk breadth of intercrop spring corn with spring soybean,density of spring corn, and density of spring soybean) with rotational design. The corresponding regression mathematical models were established by using the total yield of spring corn and soybean, the yield of spring corn,yield of spring soybean, and net values. The optimization combinations of three agronomic factors were obtained by systematical analysis. The optimization combinations of the restbalk breadth , planting density of spring corn, and planting density of spring soybean were 2.50-2.80 m, 3500-3800 plants/667 m^2,and 25000-28000 plants/667 m^2, respectively.