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针对棉花生产中使用普通农用塑料地膜导致棉田土壤污染的现状,进行了不同配方氧化-生物双降解地膜和普通地膜棉花栽培对比试验,探讨可降解地膜的降解性能及其对土壤水分、温度和棉花生长的影响。结果表明:氧化-生物双降解地膜比对照降解效果显著,降解1号降解率达74.5%,不同降解地膜的降解速率及强度不同,具有一定可控性。降解后残存地膜碎片化、变薄、变脆并紧贴地表,继续起到一定的增温、保墒作用。合理设定降解诱导期的降解地膜对土壤水分、温度和棉花生长的影响与普通地膜相当,未对棉花生长发育及产量水平产生显著影响。
In view of the status quo of cotton soil polluted using common agricultural plastic film in cotton production, comparative experiments were carried out to compare the biodegradability of degradable plastic film and its effect on soil moisture, temperature and cotton The impact of growth. The results showed that the biodegradation of oxidative-biodegradable mulching film was more remarkable than that of the control. The degradation rate of degraded mulch 1 was 74.5%. The degradation rates and intensities of mulched mulch film were different and had certain controllability. Degraded residual film fragmentation, thinning, brittle and close to the surface, continue to play a certain warming, moisture effect. Reasonably setting degradation-induced degradation of plastic film on soil moisture, temperature and cotton growth and ordinary plastic film is equivalent, did not have a significant impact on cotton growth and yield levels.