地膜覆盖技术,是用聚乙烯塑料作为地面覆盖物的一种保护地栽培技术。二十世纪中叶,一些发达国家已开始应用。l978年引入我国,目前己广泛应用,增产效果显著。该项技术的普及,推动了旱作节水农业的发展。其增产原因主要是:提高地温;保墒提墒;改善土壤理化性状,加速养分转化;促进植物生长,增强光合作用。在推广应用中,要因地制宜,并注意技术配套;同时,要搞好废旧薄膜的捡拾回收,以免造成污染危害。 Plastic film mulching technology is a protected cultivation technique using polyethylene plastic as a ground cover. By the middle of the twentieth century, some developed countries have begun to apply. l978 introduced to the United States, has now been widely used, a significant yield increase. The popularization of this technology has promoted the development of water-saving agriculture in dry farming. The main reasons for its increase are: increase the ground temperature; soil moisture entropy; improve soil physical and chemical properties, accelerate nutrient conversion; promote plant growth and enhance photosynthesis. In the promotion and application, should be adapted to local conditions, and pay attention to technical support; the same time, we must do a good job scrap pickup and recovery, so as to avoid pollution hazards.