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据多年的试验研究和生产实践证明,棉花地膜覆盖栽培,只要严格按照技术要求去做,一般比露地直播可增产30％左右。1 地膜覆盖棉田生态条件变化特点1.1 增温保墒 有效增温保墒期,主要在4～6月间(播种～初花),一般能使5cm地温提高2～4℃,有效积温(≥10℃)增加165～410℃;使0～10cm土壤含水量提高0.56％～5.2％,并使土壤水分保持平稳状态。1.2 改善土壤理化性状 棉花地膜覆盖,能减少水分和养分流失,非常有利于种子发芽出苗,实现一播全苗,特别是能有效地克服麦套棉花存在的“缺苗、
According to years of experimental research and production practices have proved that cotton mulching cultivation, as long as strictly in accordance with technical requirements to do, generally more than open-field broadcast can increase about 30%. 1 mulching cotton field ecological characteristics of changes in characteristics 1.1 warming and soil moisture effectively warming the soil moisture period, mainly in April to June (sowing ~ flowering), 5cm can generally increase the ground temperature 2 ~ 4 ℃, effective accumulated temperature (≥ 10 ℃) Increase 165 ~ 410 ℃; 0 ~ 10cm soil moisture content increased by 0.56% ~ 5.2%, and to maintain soil moisture steady state. 1.2 to improve soil physical and chemical properties Cotton film mulching, can reduce the loss of water and nutrients, is very conducive to seed germination, seedlings to achieve a broadcast, in particular, can effectively overcome the cotton crop cotton "lack of seedlings,