Biochar application mode influences nitrogen leaching and NH3 volatilization losses in a rice paddy soil irrigated with N-rich wastewater
文献类型： 外文期刊
作者： Sun, Haijun 1 ; Min, Ju 2 ; Zhang, Hailin 3 ; Feng, Yanfang 4 ; Lu, Kouping 5 ; Shi, Weiming 2 ; Yu, Min 1 ; Li, Xuewen 1 ;
作者机构： 1.Foshan Univ, Dept Hort, Foshan, Peoples R China
2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 Beijing East Rd, Nanjing 210008, Jiangsu, Peoples R China
3.Oklahoma State Univ, Dept Plant & Soil Sci, Stillwater, OK 74078 USA
4.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing, Jiangsu, Peoples R China
5.Zhejiang A&F Univ, Sch Environm & Resource Sci, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Linan, Peoples R China
关键词： Biochar; NH3 volatilization; nitrogen leaching; nitrogen usage efficiency; rice paddy soil
期刊名称：ENVIRONMENTAL TECHNOLOGY （ 影响因子：3.247； 五年影响因子：2.699 ）
ISSN： 0959-3330
年卷期： 2018 年 39 卷 16 期
页码：
收录情况： SCI
摘要： Impacts of biochar application mode on nitrogen (N) leaching, ammonia (NH3) volatilization, rice grain yield and N use efficiency (NUE) are not well understood. Therefore, a field experiment was conducted to evaluate those impacts in a rice paddy soil received 225kgNha(-1) from either urea or N-rich wastewater. One treatment received 10tha(-1) biochar with the basal fertilization, and the other received same total amount of biochar but split applied with the three split N applications with same ratio as N fertilizer split ratio (40%, 30% and 30%). Results showed that N leaching loads were 4.20-6.22kgha(-1). Biochar one-time application reduced N leaching by 23.1%, and biochar split application further reduced N leaching by 32.4%. Total NH3 volatilization loss was 15.5-24.5kgha(-1). Biochar one-time application did not influence the NH3 volatilization, but biochar split application stimulated the cumulative NH3 volatilization by 57.7%. Both biochar treatments had no influence on NUE and rice grain yield. In conclusion, biochar application mode indeed influences the N leaching and NH3 volatilization in rice paddy soils, and biochar one-time application should be recommended for reducing N leaching without increasing NH3 volatilization.
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