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塑膜地面覆盖作物栽培是一门新兴的科学技术,在国外已经广泛应用。 最早采用塑膜覆盖栽培作物的是日本,1948年开始研究,至今已有30多年的历史,还成立了日本地面覆盖栽培研究会,组织和从事这项新技术的研究工作。1955年在生产上大面积推广应用,一般平均增产30—50％,高者达1—2倍。1965年以后,在日本全国迅速推广。据1967年统计,日本覆膜栽培面积达300万亩,占全国旱田作物栽培面积的16％,在保护地栽培中,覆膜面积占93％。其中蔬菜、烟草、大蒜、甜玉米、西瓜等已基本全部采用覆膜栽培。同时,覆膜栽培改
Plastic film cover crop cultivation is a new science and technology, has been widely used abroad. The earliest use of plastic film covering cultivated crops is Japan, began to study in 1948, has been more than 30 years of history, also established the Japan ground cover cultivation research association, organize and engage in the research of this new technology. In 1955, a large area of production was popularized and applied, with an average increase of 30-50% and a high of 1-2 times. After 1965, it spread rapidly in Japan. According to the statistics of 1967, the area covered by plastic film in Japan reached 300 million mu, accounting for 16% of the cultivated area of dryland crops in China. In protected area cultivation, the covered area accounted for 93%. Among them, vegetables, tobacco, garlic, sweet corn, watermelon, etc. have all been covered with film. At the same time, the film cultivation change