近年来,地膜植棉在我区大面积推广,并取得了棉花早熟丰产的良好效果。塑膜覆盖的除草作用,根据近两年的实践,塑膜覆盖固然能将部分杂草闷死、烫死。然而,由于土壤情况不同,铺膜的质量也有好有坏,塑膜覆盖抑制杂草的作用也就有大有小,因此有些条田覆膜后,杂草仍然丛生,尤其是稗草密度大,顶膜力量也大,以致在膜下如同铺上一层厚厚的绿色毛毯,密集的草苗竟能将地膜支撑起来,这样,不但降低了地膜作用,而且杂草与棉苗发生严重争水争肥,使棉苗生长瘦弱,病虫滋生。一些连队不得不派大批劳力揭膜拔草,然后再将地膜重新覆盖,真可谓劳民伤财。 In recent years, plastic film mulching in my area a large area to promote, and achieved good results of cotton precocious yield. Plastic film covered weeding, according to the practice of the past two years, plastic film coverage although weeds will suffocate suffocate. However, due to different soil conditions, the film quality is also good or bad, the role of plastic film coverage of weeds is also very small, so some fields covered with film, the weeds are still clustered, especially the barnyardgrass density , The top membrane strength is also large, so that under the film as if covered with a thick layer of green blankets, dense grass can actually support the plastic film, so that not only reduces the role of plastic film, and weeds and cotton seedlings serious dispute Water fight fat, so that cotton seedlings grow thin, pests breeding. Some companies have to send a large number of labor unilaterally, and then re-cover the film, it is indeed a waste of money.