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选用耐荫性不同的3个大豆品种,研究其在单作和大豆玉米套作条件下的农艺性状及产量分布情况。结果表明,与单作相比,套作增加大豆株高和底荚高,分枝减少,茎粗减小,产量降低,耐荫品种变幅均为最小,不耐荫品种变幅最大。套作大豆产量垂直方向分布向上移动,耐荫大豆以20～40 cm产量最高,20～60 cm产量所占比重大;不耐荫品种以40～60 cm产量最高,且40 cm以上产量所占比重大。与单作相比,套作下大豆产量分布向分枝集中,耐荫大豆分枝产量高于主茎;不耐荫大豆主茎产量高于分枝,且主茎产量所占比重明显高于单作。
Three soybean cultivars with different shade tolerances were selected to study the agronomic characters and yield distribution of the three soybean cultivars under single-crop and soybean maize cropping practices. The results showed that compared with the single cropping, the plant height and pod height increased, the number of branches decreased, the stem diameter decreased, the yield decreased, the amplitude of shade - tolerant varieties was the smallest, and the amplitude of shade - tolerant varieties was the largest. The vertical distribution of intercropping soybean yield moved upward, the yield of shade-tolerant soybean was the highest at 20 ~ 40 cm, the yield of 20 ~ 60 cm was the highest; the shade-tolerant cultivars were the highest at 40 ~ 60 cm and the yield above 40 cm Big proportion. Compared with the single cropping, the yield distribution of the lower soybean intercropped toward the branch, the yield of the shade-tolerant soybean was higher than that of the main stem; the yield of the main stem of the non-stress-tolerant soybean was higher than that of the branch, and the proportion of the main stem was significantly higher Single.