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近年来,北京顺义县南法信公社十里堡大队以合理轮作为中心;逐年扩大冬小麦、夏玉米与春播作物(玉米、高粱、谷子和大豆)的轮种面积,实行两年三熟或三年五熟制,大大提高了各种作物单位面积粮食总产量。下面就是我们对这个问题的初步研究结果。 一 两种肥水条件下麦田轮栽对调养地力的作用 为了明确麦田轮作对于土壤肥力的影响及其增产效果,我们在十里堡大队进行了大
In recent years, Shunli County, Shunyi County, South Faith Shili Fort Brigade to reasonable round as the center; year to expand winter wheat, summer maize and spring sowing crops (corn, sorghum, millet and soybeans) rotation area, the implementation of three years or three years Five cooked, greatly increased the total grain output of various crops per unit area. Here is our preliminary research on this issue. In the case of one or two kinds of fertilizers under the conditions of wheat rotation on the role of cultivated land In order to clarify the rotation of wheat fields on the impact of soil fertility and its yield, we carried out in Shiliupu brigade