地膜覆盖栽培具有增温、保墒、灭草和速生、优质、高产的作用,该项技术1979年自日本引入后,几年来经过各地在80多种作物试验,一般可增产30—50％以上,效益显著。1983年全国已有938万亩农作物采用这种技术,为国家和农民增加牧益3亿元以上,1984年全国推广到2000万亩。同年新疆棉田推广139万亩,纯牧入增加40％左右。地膜栽培在林业上应用,效益也很显著,Cannell(1980)在英国农地上扦插美国黑杨(Populus tricnocar Mulch mulching has the effects of increasing temperature, preserving soil moisture, extinguishing grass and quick-growing, high quality and high yield. After the technology was introduced from Japan in 1979, it has been tested in more than 80 kinds of crops over the past few years and can generally increase the yield by more than 30-50% Benefit significantly. In 1983, a total of 938 million mu of crops were used in this country. This technology increased pastoralists and herdspersons over 300 million yuan for the country and peasants and was extended to 20 million mu nationwide in 1984. In the same year, 1.39 million mu of cotton fields were promoted in Xinjiang, and the input of pure and animal husbandry increased by 40%. Film mulching in forestry, the benefits are also very significant, Cannell (1980) in the United Kingdom farmland on the black poplar (Populus tricnocar