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地膜覆盖栽培技术已在全国推广,对棉花、花生、蔬菜、烟草、瓜类等多种经济作物都发挥了明显的早熟增产优势,取得了较高的经济效益。但是,在生产中尚存在着一些值得注意的问题。一、肥力不足,土壤有机质含量减少,使作物发生早衰,影响早熟增产。地膜覆盖使多种作物能增产30～50％,是一种“护根栽培”,实际上也是一种“消耗促进栽培”,所以,要增施有机肥,秸秆还田,并施入迟效性肥料及磷、钾肥,做基肥一次施入,保持肥力、提高肥力,才能使地膜覆盖获得长期稳定的增产增收效果,基肥不足,有机肥减
Film-mulching cultivation techniques have been popularized throughout the country, and have played a significant premature yield increasing advantage for many cash crops such as cotton, peanuts, vegetables, tobacco and melons, and achieved high economic benefits. However, there are some notable problems in production. First, lack of fertility, reduced soil organic matter content, premature aging of crops, affecting early maturity. Film mulching enables a variety of crops to be increased by 30-50%. It is a kind of “nursery cultivation” and actually a kind of “consumption-promoting cultivation.” Therefore, it is necessary to increase organic fertilizer, Fertilizers and phosphorus, potash, a base fertilizer to be applied once, to maintain fertility and improve fertility in order to make the mulching to obtain long-term stability of the yield increase, the lack of base fertilizer, organic fertilizer