地膜源微塑料对土壤碳循环影响的研究进展OA

Soil microplastic pollution has become a global environmental issue,among which agricultural soil mulch-derived microplastic pollution is receiving increasing attention.This paper systematically reviews the direct and indirect impact mechanisms of traditional mulch and biodegradable mulch-derived microplastics on the contents of soil organic carbon,inorganic carbon and microbial biomass carbon at home and abroad;explores the regulatory effects of different types of microplastics on soil enzyme activities related to soil carbon cycling;compares the differential impacts of traditional and biodegradable mulch-derived microplas-tics on the structure of soil carbon cycling-related microbial communities,functional gene abundance and carbon metabolic path-ways;reveals the key functional species enriched in the microplastic sphere and their potential role in promoting the conversion of microplastic carbon to soil carbon;and investigates the influence of residual microplastics on soil viral communities and their medi-ated soil carbon cycle processes.Based on the current research progress,key research avenues on mulch-derived microplastics in agricultural ecosystems are proposed,which provides some research ideas and references for future exploration of the potential impact of microplastic pollution on soil carbon storage in farmland.