由于北方地区受季节的限制,长期以来喜温性蔬菜反季节生产只能在温室、大棚中栽培。规模小、生产成本高,不能完全解决蔬菜淡季供应问题。而活动小棚由于取材容易,施工简单,成本低、效益高已成为有效的保护地生产形式,近年来发展速度很快,成为农民致富的重要措施。塑料活动小棚的集约化生产,一般亩产蔬菜 Due to the seasonal restrictions in the northern part of the world, hi-temperature vegetable anti-seasonal production can only be cultivated in greenhouses and greenhouses for a long time. Small size, high production costs, can not completely solve the problem of supply of vegetables off-season. However, the shed has become an effective protected form of production because of easy access, simple construction, low cost and high efficiency. In recent years, it has developed rapidly and has become an important measure for farmers to get rich. Intensive production of plastic shed activities, general mu produce vegetables