Presence of microplastics alone and co-existence with hydrochar unexpectedly mitigate ammonia volatilization from rice paddy soil and affect structure of soil microbiome
文献类型： 外文期刊
作者： Feng, Yuanyuan 1 ; Han, Lanfang 2 ; Li, Detian 1 ; Sun, Mingming 3 ; Wang, Xinwei 3 ; Xue, Lihong 1 ; Poinern, Gerrard 6 ; Feng, Yanfang 1 ; Xing, Baoshan 4 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agroenvironm Downstream Yangtze Plain,Min, Jiangsu Key Lab Food Qual & Safety,State Key Lab, Nanjing 210014, Peoples R China
2.Guangdong Univ Technol, Inst Environm & Ecol Engn, Guangdong Prov Key Lab Water Qual Improvement & E, Guangzhou 510006, Peoples R China
3.Nanjing Agr Univ, Coll Resources & Environm Sci, Soil Ecol Lab, Nanjing 210095, Peoples R China
4.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA
5.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Jiangsu, Peoples R China
6.Murdoch Univ, Coll Sci Hlth Engn & Educ, Murdoch Appl Innovat Nanotechnol Res Grp, Perth, WA 5150, Australia
关键词： Microplastics; Co-existence of MPs and HBC; Ammonia volatilization; Microbial structure and function; Paddy soil
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 2021影响因子：14.224； 五年影响因子：12.984 ）
ISSN： 0304-3894
年卷期： 2022 年 422 卷
收录情况： SCI
摘要： Microplastics (MPs), as an emerging pollutant, may cause deleterious changes to the nitrogen cycle in terrestrial ecosystems. However, single impact of MPs and synergistic effects of MPs with hydrochar on ammonia (NH3) volatilization and soil microbiome in paddy fields has been largely unexplored. In this study, polyethylene (PE), polyacrylonitrile (PAN) and straw-derived hydrochar (HBC) were selected for observations in an entire rice cycle growth period. Results showed that under the condition of 0.5% (w/w) MPs concentration, presence of MPs alone and co-existence of MPs and HBC (MPs + HBC) unexpectedly mitigated cumulative NH3 volatilization from paddy soil compared with the control with no MPs or HBC addition. MPs + HBC increased NH3 volatilization by 37.8-46.2% compared with MPs alone, indicating that co-existence of MPs and HBC weaken the mitigation effect of MPs on NH3 volatilization. Additionally, results of nitrogen cycle related microorganisms closely related to NH3 volatilization demonstrated that MPs + HBC altered the bacterial community structure and species diversity. These findings provide an important opportunity to advance our understanding of the impacts of MPs in agricultural environment and soils, and provide a sound theoretical basis for rationalizing the application of HBC in soil with MPs.
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