地膜盖棉花本来是一项增产措施,但有的地块增产幅度不大,有的减产,甚至连地膜的费用也没收回来,出现这些问题不怪地膜,而是土壤肥力不足,种子不对路等原因造成的。 地膜覆盖应选择土壤有机质含量高的地块。这是因为地膜覆盖到六月中旬,地表五厘米深的最高温度可达覆氏五十五度,这样高的温度,有机质极易分解。若连年搞覆盖,有机肥施用量不够,就导致土壤贫瘠。 Film covered cotton was originally an increase in production measures, but some plots increase yield is not large, and some production cuts, and even the cost of the film did not come back, these problems do not blame the film, but the lack of soil fertility, seeds, etc. wrong way Caused by reason Film mulching should choose the high content of soil organic matter. This is because the plastic film covers the middle of June. The maximum temperature of five centimeters deep on the earth surface can reach 55 degrees Centigrade. Such high temperature easily decomposes the organic matter. If engaged in perennial cover, organic fertilizer is not enough, it will lead to poor soil.