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为了研究农桐间作对棉花产量的影响,1981年秋,我们对桐棉间作进行了调查,现将调查情况总结如下:一、调查方法1、样地的选择:为了找出泡桐不同走向对棉花产量的影响,我们选择东西行向株行距7×70米;南北行向株行距8×30米的样地各一块,样地内的棉花品种为“河南79”、泡桐生长情况见表(1).
In order to study the effect of intercropping on the yield of cotton, in the autumn of 1981, we conducted a survey on the intercropping of cotton intercropping. The survey is summarized as follows: 1. Survey Method 1. Selection of plot: In order to find out the different trend of Paulownia on cotton yield We select the east-west line spacing of 7 × 70 meters; the north-south line to the line spacing of 8 × 30 meters of plots each piece, the sample of cotton varieties for the “Henan 79”, Paulownia growth shown in Table (1).