赤峰市林西县利用保护地生产蔬菜已经由试验、示范发展到大面积生产,取得了较好的经济效益.1986年,这个县的蔬菜地膜覆盖面积已经扩大到将近620亩.其中茄果类212.4亩,圆葱、大蒜等400多亩.地膜覆盖的青椒比没覆盖的每亩增产750—1000公斤,亩增值450元。覆盖的圆葱平均亩产6000公斤,高的达到7500公斤,比没覆盖 Linxi County, Chifeng City, the use of protected areas to produce vegetables has been tested and demonstrated the development of large-scale production, and achieved good economic benefits in 1986, the county’s vegetable mulching area has been expanded to nearly 620 acres. Including solanaceous 212.4 mu of onion, 400 mu of garlic, etc. The green pepper covered in plastic film has an increase of 750-1000 kilograms per acre than that not covered, and the added value of mu is 450 yuan. Onions covered an average of 6,000 kg per mu, up to 7,500 kg, more than not covered