寒旱农业科学2025，Vol.4Issue(5)：438-446,9.DOI:10.3969/j.issn.2097-2172.2025.05.009
全生物降解地膜对马铃薯田水热特性及产量的影响
Effects of Fully Biodegradable Mulch on the Hydrothermal Characteristics and Yield of Potato Fields
摘要
Abstract
This study investigated the effects of fully biodegradable mulch film on potato yield and soil hydrothermal characteristics in search of optimal planting methods for conserving soil moisture,suppressing evaporation,and reducing farmland pollution in dry farming areas.Using the potato variety Qingshu 9 as an indicator crop and open-field without mulch as a control,four types of mulch materials,i.e.,starch-based biodegradable mulch,cellulose-polymer biodegradable mulch,polylactic acid(PLA)-based biodegradable mulch,and polyethylene(PE)film,were compared for their influence on soil hydrothermal dynamics,potato yield,and film degradationperformanceduring the potato growing season.Results showed that all mulching treatments significantly improved soil water content compared with the control,with increases of 9.23％,24.35％,and 33.03％under starch-based,cellulose-polymer,and PLA-based mulch materials,respectively,relative to the PE film,and the most significant improvements were observed during seedling emergence and starch accumulation stages.All mulch types exhibited a soil-warming effect at 5 to 15 cm soil depth,with the order of effectiveness being PE film>PLA mulch>cellulose-polymer mulch>starch-based mulch.The degradation performance analysis showed that the degradation rate of the 3 biodegradable films increased with burial duration at 10 and 20 cm soil depths,while PE film remained relatively stable.The starch-based film entered the induction phase 37 days after surface application and reached full degradation at 78 days.The cellulose-polymer and PLA films entered induction at 66 and 79 days,reaching complete degradation at 121 and 140 days,respectively.All mulch treatments enhanced yield compared to the control,with PE film showing the highest increase of 32.77％.PLA and cellulose-polymer films increased yields by 28.65％and 22.69％,respectively,though slightly less than PE.The starch-based film did not significantly improve yield,with only a 6.64％increase over the control and a 19.68％decrease relative to PE,likely due to its premature degradation.Given the alignment of their degradation cycles with the potato growth period,PLA and cellulose-polymer films show promising application potential in potato cultivation.关键词
全生物降解地膜/马铃薯/产量/土壤水热特性/降解性能Key words
Fully biodegradable mulchfilm/Potato/Yield/Soil hydrothermal property/Degradation performance分类
农业科技引用本文复制引用
陈超,冯训宁,何丽,李世成,李继明,边彩燕..全生物降解地膜对马铃薯田水热特性及产量的影响[J].寒旱农业科学,2025,4(5):438-446,9.基金项目
国家马铃薯标准化区域服务与推广平台项目(NBFW-17-2019) （NBFW-17-2019）
甘肃省科技计划项目(24CXNA011) （24CXNA011）
甘肃省农业农村厅科技项目(GNKJ-2021-25). （GNKJ-2021-25）
