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OA
Effects of film mulching age and residual recycling on the distribution characteristics of microplastics in the soil of cotton field soils in Dezhou,Shandong
为研究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,本研究通过实地取样和室内试验相结合的方法进行系统研究,阐明了不同覆膜年限(0、5、10、15 a)和残膜回收措施对棉田土壤中微塑料的丰度、粒径、颜色和形状等赋存特征的影响.结果表明:在不同覆膜年限(0、5、10、15 a)下,棉田土壤微塑料的平均丰度分别为1 142、1 406、2 106、2 452 n·kg-1.随着土层深度的增加,微塑料丰度呈现出逐渐递减的趋势,0～10、10～20、20～30 cm和30～40 cm土层的微塑料丰度分别为730.5、507.4、366.5 n·kg-1和174.0 n·kg-1,微塑料丰度随土层深度增加显著减小(P<0.05);残膜回收措施下微塑料丰度减小.在类型分布上,微塑料主要呈现为纤维状(45.51%)、泡沫状(4.11%)、薄膜状(30.25%)、碎片状(15.61%)、颗粒状(4.52%)5种;粒径总体以<0.1 mm为主,随着覆膜年限的增加,粒径在各土层之间差异逐渐减小;微塑料的颜色主要以透明色(42.00%)和白色(25.09%)为主;微塑料组分主要有聚乙烯(PE,20.02%))、聚丙烯(PP,19.79%)、聚苯乙烯(PS,19.71%)等16种.研究表明,覆膜年限的增加加剧了土壤微塑料的风化和分解程度,覆盖周期越长,微塑料残留丰度越高,残膜回收可有效降低土壤中微塑料丰度.
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.
卜嫣茹;王学霞;宗海英;王芳丽;井永苹;宋宁宁;刘君
青岛农业大学资源与环境学院,山东 青岛 266109北京市农林科学院植物营养与资源研究所,北京 100097青岛农业大学资源与环境学院,山东 青岛 266109青岛农业大学资源与环境学院,山东 青岛 266109山东省农业科学院农业资源与环境研究所,济南 250100青岛农业大学资源与环境学院,山东 青岛 266109青岛农业大学资源与环境学院,山东 青岛 266109
资源环境
农田土壤微塑料覆膜年限残膜回收赋存特征
agricultural soilsmicroplasticsyears of mulchingrecycling of residual filmsdistribution characteristics
《农业环境科学学报》 2026 (8)
1995-2005,11
山东省重点研发计划项目(2024TZXD077)山东省生态农业技术体系项目(SDAIT-30-2)北京市农林科学院改革与发展课题(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)Technical System of Ecological Agriculture of Modern Agricultural Technology System in Shandong Province(SDAIT-30-2)Beijing Academy of Agricultural and Forestry Sciences Reform and Development Project(ZHS202402)Natural Science Foundation of Shandong Province(ZR2022MD050-118)
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