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我县历年高粱播种面积约10万么,占粮食作物播种面积10％左右。一九七三年从山西省忻县地区农科所引进“忻杂52号”杂交种,普遍表现产量高,品质好,着壳率低,颇受群众欢迎。然而,多年来高粱杂交制种产量低而不稳,平均亩产只有150斤左右,成了限制高粱杂交种迅速推广的重要因素。产量低的原因,一是选茬及地力不能很好的满足自交系的发育;二是父母本播期不尽合理,往往造成盛花期不是干旱就是阴雨连绵;三是密度不够;四
My county over the years sowing area of about 10 million what, accounting for about 10% of sown area of food crops. In 1973, the “Xin-hybrid 52” hybrids introduced from Xinxian County, Shanxi Province, generally showed high yield, good quality and low rate of shell formation, which were well received by the masses. However, the output of sorghum hybrids has been low and unstable over the years, with an average yield of only about 150 kg per mu, which has become an important factor that limits the rapid popularization of sorghum hybrids. The reason for the low yield is that the selection of stubble and soil fertility can not well meet the development of inbred lines. Second, the sowing date of parents is not reasonable, which often results in the rainy season when the flowering is not arid. The third is the lack of density.