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在盖膜植棉中,回收塑膜是减少土地污染、保持土壤再生产力的一项重要作业。但以何时揭膜回收为宜?这不仅是单纯的农业技术问题,而且涉及到生产上的经营管理问题。过早揭膜,达不到盖膜植棉增温保墒的目的;过晚揭膜,常因秋收工作紧张而无力顾及,且由于灌溉和耕作的关系,塑膜多为泥水淹埋,再加后期低温,多数塑膜脆裂,破碎不堪,实属无法回收,若长此下去,后果将不堪设想。
In the cover membrane cotton, plastic film recovery is to reduce land pollution, soil re-productivity to maintain an important operation. However, when the recovery of the film is appropriate? This is not only a simple agricultural technology issues, but also related to the management of production issues. Uncovering the membrane prematurely, failing to achieve the purpose of increasing the temperature and preserving the soil temperature by covering the membrane with cotton; late exposing the membrane, often due to the work of autumn harvest and lack of power to take care of, and due to the relationship between irrigation and farming, Low temperature, most plastic film brittle crack, crushed, it is impossible to recover, if the long run, the consequences will be disastrous.