1982年,沈阳市东陵区有12,100平方米的育苗地采用地膜覆盖技术,均收到较好效果。通过地膜覆盖,能提高播种层土温3℃左右,播种层含水量也较对照多2～3％。茄子、番茄、青椒比不覆膜早出苗2～4天,甘蓝、黄瓜早出苗1～2天,圆葱早出苗7天左右,出苗率普遍提高10～20％。 In 1982, Shenyang Dongling District 12,100 square meters of nursery area using mulching technology, have received good results. Through the plastic film mulching, the soil temperature of the sowing layer can be increased by about 3 ℃, and the water content of the sowing layer is also 2 ~ 3% more than that of the control. Eggplant, tomato and green peppers were 2 to 4 days earlier than the non-laminating ones. The early emergence of cabbage and cucumber was about 1 to 2 days. The early emergence of onion was about 7 days and the germination rate generally increased by 10 to 20%.