在棉花生产中，地膜覆盖栽培技术已在大多数地区推广应用。其在提高棉花产量和品质方面，深受广大棉农欢迎。但由于烂种和地膜“烧苗”等诸多因素，常常造成缺苗断垄。而且由于地膜棉生长发育快，后补小苗与先播大苗相差大。造成小苗歇凉避阴，秋后多不能正常开絮，影响棉... In cotton production, plastic film mulching cultivation technology has been applied in most areas. Its cotton yield and quality, welcomed by the majority of cotton farmers. However, due to rotten and plastic film “burn seedlings” and many other factors, often resulting in lack of seedlings off ridge. And because of the rapid growth and development of plastic film mulberry cotton seedlings after the big difference between the big and the first broadcast. Caused by small seedlings cool shade, after the fall can not be more than normal open tuck, affecting cotton ...