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| Effects of treated domestic sewage irrigation on ammonia volatilization in straw-returning paddy fields |
| Received:January 19, 2020 |
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| KeyWord:ammonia volatilization;straw-returning;paddy fields;nitrogen uptake;treated domestic sewage irrigation;pH |
| Author Name | Affiliation | E-mail | | LI Meng-yao | College of Agricultural, Henan University of Science and Technology, Luoyang 471000, China
Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Key Laboratory of Food Quality and Safety in Jiangsu, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China | | | WANG Xu-gang | College of Agricultural, Henan University of Science and Technology, Luoyang 471000, China | | | XU Xiao-feng | College of Agricultural, Henan University of Science and Technology, Luoyang 471000, China | | | DUAN Jing-jing | Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Key Laboratory of Food Quality and Safety in Jiangsu, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China | | | XUE Li-hong | Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Key Laboratory of Food Quality and Safety in Jiangsu, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Jiangsu Mudflat Collaborative Innovation Center of Biological Agriculture, Yancheng Teachers University, Yancheng 224002, China | njxuelihong@gmail.com | | YANG Lin-zhang | Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Key Laboratory of Food Quality and Safety in Jiangsu, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Jiangsu Mudflat Collaborative Innovation Center of Biological Agriculture, Yancheng Teachers University, Yancheng 224002, China | |
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| Abstract: |
| In this study, a soil column monitoring experiment was conducted to assess the effects of treated domestic sewage irrigation on floodwater ammonium(NH4+-N)and nitrate nitrogen(NO3--N)concentrations, ammonia volatilization(NH3), and paddy yields in straw-returning paddy fields. Treated domestic sewage significantly improved the NO3--N concentration and the pH of floodwater, and also significantly improved the rice yields, plants nitrogen uptake, and soil urease activity. Compared with tap water irrigation, treated domestic sewage irrigation significantly decreased the cumulative NH3 emission by 35% without nitrogen fertilizer application; while it increased the cumulative NH3 emission when nitrogen fertilizer was applied with the same N input. The yield-scale NH3 volatilization losses were decreased with the use of treated domestic sewage irrigation due to the improved yield. Thus, treated domestic sewage irrigation in straw-returning paddy fields can not only reuse and purify wastewater, partially replace nitrogen fertilizer use, increase paddy yields, but also reduce the yield-scale NH3 volatilization losses, which is promising for rice production and environmental emission. |
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