棉花是深根系作物,生长期长,需肥量大,对土壤肥力有较高的要求,一般棉花施肥要掌握“足、轻、稳、重、补”五字原则。l、“足”即施足基肥。基肥用量应达到全生育期总施肥量的60%～70%,因地施肥,以有机肥为主,化学肥料为辅。有机肥能够提高土壤有机质,改善土壤结构,增强土壤通透性和活性,一般高产棉田亩施有机肥3000-4000千克,中产棉田亩施有机肥2000-3000 Cotton is a deep-rooted crop, long-term growth, the need for large amount of fertilizer, soil fertility have higher requirements, the general cotton fertilizer to master “foot, light, stable, heavy, fill ” principle. l, “foot ” Shizujifei. The amount of basal fertilizer should reach 60% ~ 70% of the total fertilization amount during the whole growth period. Fertilizing on the basis of organic fertilizer and supplemented by chemical fertilizers. Organic fertilizer can improve soil organic matter, improve soil structure, enhance soil permeability and activity, generally high-yielding cotton Mush Shi 3000-4000 kg of organic fertilizer, middle-yielding cotton Mushu organic fertilizer 2000-3000