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从1983年南城县建昌镇蔬菜研究所开始引进地膜覆盖新技术,并连续开展应用性鉴定试验,几年来由小区试验到大面积的示范和推广应用,发展到1987年春蔬菜覆盖地膜面积占97.5％以上,效益十分显著。一、地膜覆盖栽培技术效应1、提高了土壤耕作层地温①在正常天气里,地膜覆盖的增温7～26℃。②夜间在和阴雨天有保温作用。覆膜的早上8时温度最低,不覆膜的在早晨4时温度最低,而两者最高温度均出现在14时,此时最大地温差6.8℃。由于覆膜后夜间降温慢,
From 1983, Jianchang Town, Nancheng County Vegetable Research Institute began to introduce new technology of mulching, and continuous application of appraisal test, a few years from the district to a large area of demonstration and promotion of the application to the spring of 1987 to cover the area covered by plastic film 97.5 % Or more, the effectiveness is very significant. First, the technical effects of plastic film mulch cultivation 1, increased soil temperature plow layer ① in normal weather, plastic film mulching temperature 7 ~ 26 ℃. ② at night and in the rainy days with insulation. The temperature was the lowest at 8 o’clock in the morning, the temperature was lowest at 4 o’clock in the morning, and the maximum temperature was at 14 o’clock in the morning. The maximum temperature difference at this time was 6.8 oC. As the film after cooling slowly at night,