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推广农桐间作,人们普遍担心的是农作物是否减产。为了弄清这个问题,从1978年开始,我们在农桐间作地中对夏秋作物的产量进行了广泛的调查,按机械随机布点的原则抽样,对样本资料进行统计分析。调查结果证明;除泡桐行距30米以下间作地中夏秋作物(小麦、玉米)有减产的情况外,30米以上行距的间作地中夏秋作物(小麦、玉米)均属于增产情况。现以1979年秋季崔楼东队一块60米行距泡桐——玉米人工栽培群落的间作地为例,进行具体分析。崔楼东队样地,泡桐林带为东西走向,株行距为5×60米,林带行长约300米。调查时,选择有代表性的两行各六株树的范围内机械随机设点抽样,调查线由北向南设
Intercropping agricultural Tong, people are generally worried about whether the crop is cut. In order to clarify this issue, from 1978 onwards, we conducted an extensive survey on the yield of summer and autumn crops in the inter-crop field of Nong Tung. According to the principle of random distribution of machinery, we conducted a statistical analysis of the sample data. The results of the survey showed that the intercropping of summer and autumn crops (wheat and maize) with the row spacing above 30 meters all belonged to the increase of yield, except for the decrease of mid-summer summer crops (wheat and maize) under the row spacing of 30 meters. Now in the autumn of 1979 Cui Lou East team a 60-meter row Paulownia - maize artificial cultivation community intercropping as an example, for specific analysis. Cui Lou East team sample, Paulownia forest belt for the east-west, spacing of 5 × 60 meters, about 300 meters long forest belt. Survey, the choice of a representative of two trees within the scope of six randomly set point sampling machinery, survey line from north to south