一种双降解膜在北疆棉区降解性能评价

Evaluation of Degradation Performance of a Photo-biodegradable Polyethylene Film in the Northern Xinjiang Cotton Fields

【目的】评价EPI双降解膜在北疆棉区的综合性能,为技术引进和生产应用提供依据。【方法】(1)通过自然光照、表面积法、地温计法测定地膜的诱导期、光降解能力及增温保温效果;(2)通过地埋法测定生物降解性能;(3)通过小区生产试验对比降解地膜对棉花产量和纤维品质的影响。【结果】EPI双降解膜能提高早春地温,光降解能力较强,但生物降解性能均较差。【结论】光降解能力符合技术需求,但生物降解能力有待提高。

【Objective】 The purpose of this program was to test and evaluate the comprehensive performance of photo-biodegradable polyethylene film in northern Xinjiang cotton fields,which might provide clues for introduction of this kind of technology and its application.【Method】 The induction periods,capability of the photo degradation,raising temperature and preserving temperature of the film were obtained through measuring surface area and corresponding temperature after light,and then the degradation performance in the different depths were determined.Finally the effect of the film on the yield and fiber quality of cotton was analyzed by plot experiment.【Conclusion】 The EPI film can improve the soil temperature in the early spring,and it can be more easily degraded by the light than by biology,which indicated that the capability of photo degradation fit for the technological needs,but the capability of the bio-degradation needs to be improved.