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1982年我们在忻州市南胡大队和武家山大队进行了地膜覆盖冬小麦增产效应试验;1983年与山西省农牧厅农业局协作,分别在忻州、太原、榆次、太谷、平遥、柳林、霍县、新绛等地进行大面积布点示范。一、增产效应1982年忻州地区春季冻害严重,小麦越冬死亡率达30%,但地膜覆盖的比露地的冬小麦每亩平均增产229斤,增产率45.3%;特别是晚播麦田长成的三类苗,冬季覆盖的比露地的每亩增产374.5斤。试验还表明,冬季覆盖优于春季覆盖,平均每亩增产187斤。春季覆盖的三类苗与大田适时播种的产量基本相同。春季覆盖不如冬季覆盖的主要原因是成穗率低,有效穗数少。
In 1982, we conducted a trial of plastic film-mulching winter wheat yield increase in Nanhu Battalion and Wujiashan Brigade in Xinzhou City. In 1983, we cooperated with the Agriculture Bureau of Shanxi Provincial Department of Agriculture and Animal Husbandry in Xinzhou, Taiyuan, Yuci, Taigu, Pingyao, Liulin, Huo County, Xinjiang and other places for large-scale deployment of demonstrations. First, the stimulation effect Xinzhou area in 1982 severe winter frost damage, overwintering mortality rate of 30% of wheat, but the plastic film coverage than the open field of winter wheat yield 229 pounds per mu, yield 45.3%; especially the late-sowing wheat fields into three types Miao, winter covered more than the open area of 374.5 kg per mu. Experiments also show that winter coverage is better than spring coverage, an average yield of 187 kg per mu. The three types of seedlings covered in spring and field timely sowing output is basically the same. Spring coverage is not as good as the winter coverage of the main reasons is the low rate of spike, effective spike less.