近年来,利用陆地棉品种间杂种优势提高棉花单产,已引起国内各有关部门的重视。两年来,我县引用河南省推广的“徐州142x中棉所7号”组合多点试种,不同程度上都反映出杂种一代的经济优势。据调查,一九七八年在罗南、盛桥等八公社二十二试点101.97亩杂种一代的产量结果,其中增产点17个,占调查点数的77.27%,增产面 In recent years, the use of heterosis among upland cotton varieties to improve cotton yield has attracted the attention of all relevant departments in China. In the past two years, our county quoted the promotion of “Xuzhou 142x China Cotton Soybean 7 ” combination of multi-point trial, to varying degrees, all reflect the economic advantages of the hybrid generation. According to the survey, in 2017, the output of the 101.97 mu hybrid generation was tested on 22 communes in Luonan and Shengqiao, etc., of which 17 were production points, accounting for 77.27% of the surveyed spots. The yield increase