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1979年以来,我国很多省、市、自治区陆续试验、示范和推广了地膜覆盖栽培技术,几年来已取得了可喜的成果。地膜覆盖栽培的作物越来越多,目前已在80多种作物上试验,有40多种在生产中推广应用。而积由1979年的660多亩,到1984年达到2000万亩,遍布全国各地。经济效益也很高,很多作物单产增长30—50%,有的增长更高,亩纯收入一般增加50元以上,有的上
Since 1979, many provinces, municipalities and autonomous regions in China have successively experimented, demonstrated and popularized the technology of plastic film mulch cultivation and have made gratifying achievements in recent years. More and more mulched film mulching crops have been tested on more than 80 kinds of crops and more than 40 kinds have been popularized and applied in production. The product by the 660 acres in 1979, reached 20 million mu in 1984, all over the country. Economic efficiency is also very high, many crop yields increased by 30-50%, some higher growth, net income per mu generally increased more than 50 yuan, and some on