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1.日本的保护地发展概况日本的保护地建筑设施形式多种多样,有地膜、浮动膜、成排膜、覆盖网、小拱棚、不织布大棚、塑料大棚、塑料温室、玻璃温室、玻璃钢温室、有机玻璃温室、聚脂胶片温室、人工气候室、植物工厂等。近几年来,地膜栽培一直保持在每人有16.4米~2这个高数字的水平上;温室则每人达到3.25米~2的水平;1985年保护地总数为331900公顷,按人口平均达27.66米~2,这些数字在全世界都处于领先地位。小拱棚略有减少,而加温温室呈发展趋势,其中主要是塑料温室发展较快,特别是无骨架的浮动直接
1. Development of Japan’s Protected Areas There are many forms of protected construction sites in Japan. These include plastic mulch, floating mulch, film mulching, overlay netting, small arch sheds, plastic sheds, plastic greenhouses, glasshouses, fiberglass greenhouses, Plexiglass greenhouse, polyester film greenhouse, artificial climate chamber, plant factories. In recent years, plastic film cultivation has been maintained at a high level of 16.4 to 2 per person; in greenhouses, it has reached 3.25 to 2. In 1985, the total number of protected areas was 331,900 hectares, averaging 27.66 meters by population ~ 2, these numbers are in the world leader. Slightly reduced small shed, while the greenhouse showed a trend of development, which is mainly the rapid development of plastic greenhouses, in particular, no skeleton floating direct