Every coin has two sides: Continuous and substantial reduction of ammonia volatilization under the coexistence of microplastics and biochar in an annual observation of rice-wheat rotation system
文献类型： 外文期刊
作者： Feng, Yuanyuan 1 ; Han, Lanfang 2 ; Sun, Haijun 3 ; Zhu, Dong 4 ; Xue, Lihong 1 ; Jiang, Zhong-Tao 6 ; Poinern, Gerrard Eddy Jai 6 ; Lu, Qianwen 7 ; Feng, Yanfang 1 ; Xing, Baoshan 5 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agroenvironm Downstream Yangtze Plain,Min, Key Lab Combined Farming & Raising,Natl Agr Expt, 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 Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
4.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
5.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA
6.Murdoch Univ, Coll Sci Hlth Engn & Educ, Surface Anal & Mat Engn Res Grp, Murdoch Appl Innovat Nanotechnol Res Grp, Perth, WA 5150, Australia
7.Univ Connecticut, Dept Plant Sci & Landscape Architecture, Storrs, CT 06269 USA
关键词： Soil ammonia volatilization; Microplastics; Biochar; Rice-wheat rotation; Dissolved organic matter
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）
ISSN： 0048-9697
年卷期： 2022 年 847 卷
页码：
收录情况： SCI
摘要： Microplastics (MPs) are verified to affect the fate of ammonia (NH3) in agricultural soils. However, the impacts and mechanisms of MPs coupled with biochar (BC), a widely used agricultural conditioner, on NH3 losses are mostly untapped. The aim of this study was to investigate the mechanisms of common MPs (i.e., polyethylene, polyester, and polyacrylonitrile) and straw-derived BC on NH3 volatilization in rice-wheat rotation soils. Results showed that BC alone and MPs with BC (MPs + BC) reduced 5.5 % and 11.2-26.6 % cumulative NH3 volatilization than the control (CK), respectively, in the rice season. The increased nitrate concentration and soil cation exchange capacity were dominant contributors to the reduced soil NH3 volatilization in the rice season. BC and MPs + BC persistently reduced 44.5 % and 60.0-62.6 % NH3 losses than CK in the wheat season as influenced by pH and nitrate concentration. Moreover, BC and MPs + BC increased humic acid-like substances in soil dissolved organic matter by an average of 159.1 % and 179.6 % than CK, respectively, in rice and wheat seasons. The increased adsorption of soil NH4+ and the promotion of crop root growth were the main mechanisms of NH3 reduction. Our findings partially revealed the mechanisms of the coexistence of MPs and BC on NH3 mitigation in rice-wheat rotational ecosystems.
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