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以室内试验为基础,结合三年来的生产性试验,研究了夏玉米成熟期籽粒的脱水规律和脱粒质量与籽粒含水率、脱粒参数之间的关系。结果表明直接脱粒收获的适宜条件是:玉米籽粒含水率<30%,脱粒速度13.0～14.5 m·s~(-1)(400～450 r·min~(-1))。北京地区10月上旬夏玉米籽粒含水率能够降到30%左右。因此只要措施得当,可以实现夏玉米田间直接脱粒收获。
Based on the laboratory experiments and three years of productive experiments, the relationship between dehydration regularity and the threshing quality and grain moisture content and threshing parameters of summer maize was studied. The results showed that the optimum conditions for direct threshing harvesting were as follows: the moisture content of corn seeds was less than 30% and the threshing speed was 13.0-14.5 m · s -1 (400-450 r · min -1). In early October in Beijing, summer maize grain moisture content can be reduced to about 30%. So as long as the measures properly, you can achieve summer threshing grain harvest.