Deciphering microplastic ecotoxicology:impacts on crops and soil ecosystem functions  

作　　者：Shahid Iqbal Jianchu Xu Sehroon Khan Muhammad Saleem Arif Tahira Yasmeen Sadia Nadir Douglas Allen Schaefer 

机构地区：[1]Honghe Centre for Mountain Futures,Kunming Institute of Botany,Chinese Academy of Science,Honghe 654400,Yunnan,China [2]CIFOR-ICRAF China Country Program,World Agroforestry Centre,Kunming 650201,China [3]Department of Environmental Sciences and Engineering,Government College University,Faisalabad,38000,Pakistan [4]Department of Chemistry,University of Science and Technology,Bannu,28100,KPK,Pakistan

出　　处：《Circular Agricultural Systems》2021年第1期55-61,共7页循环农业系统（英文）

基　　金：the Key Project from the Ministry of Sciences and Technology of China(No.2017YFC0505100);Authors are also thankful to Yunnan Human Resource and Social Security Department for providing funds.In addition,Dr.Shahid Iqbal and Dr.Sehroon Khan acknowledge funds from the Chinese Academy of Sciences for the President’s International Fellowship Initiative(Grant nos.2021PB00094 and 2019PC0011)for his postdoctoral research.

摘　　要：Review on microplastic toxicity in agroecosystems is scarce.Thus,we develop a conceptual model(based on literature to date)that describes various microplastic effects using a size-scale.We also classify crops depending on their observed responses,and discuss several conceptual mechanisms of soil functions.The model shows that microplastic effects on crops can be positive,toxic,lethal and no-effect.Predominantly,microfibers in a wide range of sizes can positively affect crops.However,toxic effects of microplastics with/without other pollutants are more common at different sizes.Surprisingly,biodegradable plastic effects are lethal,calling into question their environmental friendliness.No-effect on crops is also possible but less observed.Unlike other crops(e.g.,wheat,maize and bean),only onion seems resistant to microplastics.Crop uptake of micro/nanoplastic demands a clear benchmark to ensure food-safety.Furthermore,mixed effects are observed on soil functions.Alternation in soil enzymes and litter decomposition can affect nutrients and organic matter biogeochemistry.Hydrophobicity can be induced by increasing evaporation.Shifts in microbial community structure and activities are inevitable.

关 键 词：CROPS SOIL SIZES 

分 类 号：S51[农业科学—作物学]