农业环境科学学报2026，Vol.45Issue(8)：1995-2005,11.DOI:10.11654/jaes.2025-0720
覆膜年限和残膜回收对德州棉田土壤微塑料赋存特征的影响
Effects of film mulching age and residual recycling on the distribution characteristics of microplastics in the soil of cotton field soils in Dezhou,Shandong
摘要
Abstract
To investigate the effects of plastic film mulching duration and residual film recycling on the occurrence characteristics of microplastics in Dezhou cotton field soils.A combination of field sampling and laboratory experiments was adopted in this study to conduct a systematic investigation,aiming to explore how different mulching durations(0,5,10,15 years)and residual film recycling measures affect the occurrence characteristics of soil microplastics—including abundance,particle size,color,and shape.The results showed that under mulching durations of 0,5,10 years,and 15 years,the average abundances of microplastics in cotton field soils were found to be 1 142,1 406,2 106 n·kg-1,and 2 452 n·kg-1,respectively.As soil depth increased,a gradual downward trend in microplastic abundance was exhibited:in the 0-10,10-20,20-30 cm,and 30～40 cm layers,the abundances were determined to be 730.5,507.4,366.5 n·kg-1,and 174.0 n·kg-1,respectively.A significant decrease in microplastic abundance with increasing soil depth was observed(P<0.05).Residual film recycling was also found to reduce microplastic abundance.Regarding morphological distribution,five primary forms of microplastics were identified:fibrous(45.51%),foamy(4.11%),film-like(30.25%),fragmented(15.61%),and granular(4.52%).For particle size,microplastics were predominantly categorized as<0.1 mm;notably,the differences in particle size across soil layers were found to gradually diminish with increasing mulching duration.Microplastics were mainly classified as transparent(42.00%)and white(25.09%)in terms of color.Sixteen chemical components of microplastics were identified,with polyethylene(PE,20.02%),polypropylene(PP,19.79%),and polystyrene(PS,19.71%)being the primary ones.In conclusion,longer plastic film mulching durations were found to intensify the weathering and decomposition of soil microplastics—with a longer mulching period corresponding to higher residual microplastic abundance.Residual film recycling was confirmed to effectively reduce the abundance of microplastics in soil.关键词
农田土壤/微塑料/覆膜年限/残膜回收/赋存特征Key words
agricultural soils/microplastics/years of mulching/recycling of residual films/distribution characteristics分类
资源环境引用本文复制引用
卜嫣茹,王学霞,宗海英,王芳丽,井永苹,宋宁宁,刘君..覆膜年限和残膜回收对德州棉田土壤微塑料赋存特征的影响[J].农业环境科学学报,2026,45(8):1995-2005,11.基金项目
山东省重点研发计划项目(2024TZXD077) （2024TZXD077）
山东省生态农业技术体系项目(SDAIT-30-2) （SDAIT-30-2）
北京市农林科学院改革与发展课题(ZHS202402) （ZHS202402）
山东省自然科学基金面上项目(ZR2022MD050-118) Key Reaserch and Development Program of Shandong Province(2024TZXD077) （ZR2022MD050-118）
Technical System of Ecological Agriculture of Modern Agricultural Technology System in Shandong Province(SDAIT-30-2) （SDAIT-30-2）
Beijing Academy of Agricultural and Forestry Sciences Reform and Development Project(ZHS202402) （ZHS202402）
Natural Science Foundation of Shandong Province(ZR2022MD050-118) （ZR2022MD050-118）
