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在麦棉两熟制地区,为解决好麦棉常年套种的土壤肥力消耗问题,我们于1982～1984年就麦棉两熟套种两肥耕作制做了定位试验。试验田土壤为粉沙壤土,肥力中上等,耕层土壤有机质含量1.62％,全氮0.103％,速效磷13.4ppm。10月底手扶拖拉机旋耕翻埋秋绿肥,条播盐辐矮早三大麦,麦辐1.4尺(麦套棉4尺组合),麦收后麦茬铺放麦秸300斤/亩。4月中旬套种盐棉48,塑膜地面覆盖,密度3600株/亩,7月上旬翻埋棉花
In the wheat-cotton two-cropping system, in order to solve the problem of soil fertility of annual wheat-cotton intercropping, we conducted a pilot test on the two-cropping system of wheat and cotton intercropping between 1982 and 1984. The soil in the experimental field is silty loam which has middle-high fertility. The content of organic matter in tillage soil is 1.62%, total nitrogen is 0.103% and available phosphorus is 13.4ppm. At the end of October, tractor tillage autumn autumnal green manure, barley salt spoke short morning three barley, wheat spoke 1.4 feet (wheat cotton cotton 4 feet combination), wheat harvest wheat stubble laying straw 300 kg / mu. In mid-April intercropping salt cotton 48, plastic film covering the ground, the density of 3600 plants / mu, in early July burying cotton