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Floating duckweed mitigated ammonia volatilization and increased grain yield and nitrogen use efficiency of rice in biochar amended paddy soils

文献类型： 外文期刊

作者： Sun, Haijun 1 ; A, Dan 2 ; Feng, Yanfang 3 ; Vithanage, Meththika 4 ; Mandal, Sanchita 5 ; Shaheen, Sabry M. 6 ; Rinkl 1 ;

作者机构： 1.Nanjing Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Jiangsu, Peoples R China

2.Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou, Guangdong, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Jiangsu, Peoples R China

4.Univ Sri Jayewardenepura, Fac Appl Sci, Ecosphere Resilience Res Ctr, Nugegoda, Sri Lanka

5.Univ South Australia, Future Ind Inst, Bldg 10, Mawson Lakes, SA 5095, Australia

6.Univ Wuppertal, Inst Fdn Engn Water & Waste Management, Sch Architecture & Civil Engn, Lab Soil & Groundwater Management, Pauluskirchstr 7, D-42285 Wuppertal, Germany

7.Foshan Univ, Sch Food Sci & Engn, Foshan 528000, Guangdong, Peoples R China

8.Zhejiang A&F Univ, Sch Environm & Resource Sci, Hangzhou 311300, Zhejiang, Peoples R China

9.Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Guangdong, Peoples R China

10.King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Arid Land Agr, Jeddah 21589, Saudi Arabia

11.Univ Kafrelsheikh, Fac Agr, Dept Soil & Water Sci, Kafr Al Sheikh 33516, Egypt

12.Univ Sejong, Dept Environm Energy & Geoinformat, Seoul 02841, South Korea

关键词： Ammonia volatilization; Atmospheric environment; Biochar; Grain yield; Nitrogen use efficiency; Urea

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2019 年 237 卷

页码：

收录情况： SCI

摘要： Biochar (BC) potentially accelerates ammonia (NH3) volatilization from rice paddy soils. In this regard, however, application the floating duckweed (FDW) to biochar-amended soil to control the NH3 volatilization is not studied up-to-date. Therefore, the impacts of BC application with and without FDW on the NH3 and nitrous oxide (N2O) emissions, NUE and rice grain yield were evaluated in a soil columns experiment. We repacked soil columns with Hydragric Anthrosol and Haplic Acrisol treated in triplicates with Urea, Urea + BC and Urea + BC + FDW. Total NH3 losses from Hydragric Anthrosol and Haplic Acrisol were 15.2-33.2 kg N ha(-1 )and 19.6-39.7 kg N ha(-1), respectively. Urea + BC treatment recorded 25.6-43.7% higher (p < 0.05) NH3 losses than Urea treatment, attributing to higher pH value of floodwater. Floating duckweed decreased soil pH and therefore significantly reduced (p < 0.05) the NH3 volatilizations from the two soils by 50.6-54.2% over Urea + BC and by 34.2-38.0% over Urea treatment. Total N2O emissions from Hydragric Anthrosol and Haplic Acrisol were 1.19-3.42 kg N ha(-1) and 0.67 -2.08 kg N ha(-1), respectively. Urea + BC treatment increased N2O emissions by 58.8-68.7% and Urea + BC + FDW treatment further increased N2O emission by 187.4-210.4% over Urea treatment. Higher ammonium content of the topsoil, explained the N2O increases in the Urea + BC and Urea + BC + FDW treatments. Urea + BC slightly reduced the rice grain yield and NUE, while the Urea + BC + FDW promoted both rice yield and NUE. Our data indicate that co-application of FDW along with BC in paddy soil could mitigate the NH3 volatilization and enhance the rice grain yield and NUE. (C) 2019 Elsevier Ltd. All rights reserved.

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