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榆社地处高寒山区,年平均气温只有8.8℃,平均无霜期只有148天,且早春地温偏低,多数年份高粱制种失败,亩产仅百斤左右。为此,我们于1984年在“晋杂4号”高粱制种上试行用地膜覆盖一半父本代替错期播种。收获结果证明,此法较常规法投资少,收益大,具有一定的推广价值。一、试验办法此试验在我县
Yushe is located in the alpine mountains, the annual average temperature of only 8.8 ℃, the average frost-free period of only 148 days, and early spring ground temperature is low, the majority of years of sorghum seedling failure, yield only about 100 pounds. For this reason, we tried to cover half of the sorghum seeds with “Jinzhao 4” in 1984 in place of the wrong seeding. Harvest results show that this method is less investment than the conventional method, the benefits of large, with some promotional value. First, the test method This test in my county