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应用塑料薄膜地面覆盖栽培玉米,具有增温、保墒、早熟、高产、优质和抑控杂草的显著作用。经我县1982、83两年的多点试验、示范,单种玉米中单2号,最高亩产1633斤,比未盖膜增产530斤,增产率48.0％,酒泉县地膜种植玉米最高亩产1870斤,比未盖膜的增产58％。可见,地膜覆盖栽培玉米产量高,增产幅度大。其次,提高了地温,减少了土壤水分的蒸发,满足玉米喜温喜水的特性。有利于玉米早发早长,提早成熟,避免冻害。与对照田相比,可提高地温3—6℃;提早出苗5—8天,出苗率高达99％以上;成熟期提前15—20
Application of plastic film ground cover cultivation of corn, with warming, preserving soil moisture, early maturity, high yield, high quality and control of weeds significant role. After many trials and demonstrations in 1982 and 1983 in Yixian County, single No. 2 single corn was planted with the highest yield of 1,633 kg per mu, an increase of 530 kg and an increase rate of 48.0% over that of the uncapped film. The highest yield of maize in Jiuquan County 1870 pounds, 58% more than the uncapped film. Can be seen, mulched corn cultivation yield high yield increase. Secondly, the ground temperature is raised, the evaporation of soil moisture is reduced, and the characteristics of the corn-water of hi-temperature are satisfied. Early in the morning is conducive to early corn, early maturity, to avoid frost damage. Compared with the control field, can increase the ground temperature 3-6 ℃; early emergence 5-8 days, the germination rate as high as 99%; maturity of 15-20