Microplastics affect activity and spatial distribution of C,N, and P hydrolases in rice rhizosphere  

作　　者：Yaoyao Tong Jina Ding Mouliang Xiao Muhammad Shahbaz Zhenke Zhu Ming Chen Yakov Kuzyakov Yangwu Deng Jianping Chen Tida Ge 

机构地区：[1]School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China [2]State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Institute of Plant Virology,Ningbo University,Ningbo 315211,China [3]Centre for Environmental and Climate Science,Lund University,22362 Lund,Sweden [4]Department of Soil Science of Temperate Ecosystems,Department of Agricultural Soil Science,University of Göttingen,37077 Göttingen,Germany

出　　处：《Soil Ecology Letters》2023年第3期13-24,共12页土壤生态学快报（英文）

基　　金：We are grateful for financial support from the National Key Research and Development Plan(2019YFC1805100);the National Natural Science Foundation of China(42107341,21767012);the UK Natural Environment Research Council and the Global Challenges Research Fund(NE/V005871/1);sponsorship by K.C.Wong Magna Fund in Ningbo University;the Science and Technology Plan of Ganzhou City(GSKF201850).

摘　　要：Microplastics provide a new ecological niche for microorganisms,and the accumulation levels of microplastics(MPs)in terrestrial ecosystems are higher than those in marine ecosystems.Here,we applied the zymography to investigate how MPs–polyethylene[PE],and polyvinyl chloride[PVC])at two levels(0.01%and 1%soil weight)impacted the spatial distribution of soil hydrolases,nutrient availability,and rice growth in paddy soil.MPs increased the above-ground biomass by 13.0%–15.5%and decreased the below-ground biomass by 8.0%–15.1%.Addition of 0.01%and 1%MPs reduced soil NH4+content by 18.3%–63.2%and 52.2%–80.2%,respectively.The average activities of N-and P-hydrolases increased by 0.8%–4.8%and 1.9%–6.3%with addition of MPs,respectively.The nutrient uptake by rice plants and the enzyme activities in hotspots increased with MP content in soil.The accumulation of MPs in paddy soil could provide an ecological niche that facilitates microbial survival,alters the spatial distribution of soil hydrolases,and decreases nutrient availability.

关 键 词：MPs accumulation Soil zymography Microbial hotspots Soil nutrients Soil hydrolases 

分 类 号：S15[农业科学—土壤学]