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题名: NO and N2O emissions from agricultural fields in the North China Plain: Origination and mitigation
作者: Zhang, Yuanyuan; Mu, Yujing; Zhou, Yizhen; Tian, Di; Liu, Junfeng; Zhang, Chenglong
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
出版日期: 2016-05-01
卷号: 551, 期号:0, 页码:197-204
关键词: Nitric oxide ; Nitrous oxide ; Origination ; Nitrification ; Mitigation ; North China Plain
DOI: 10.1016/j.scitotenv.2016.01.209
部门归属: 大气环境科学实验室
英文摘要: Agricultural soil has been recognized as a major source of atmospheric NO and N2O emissions which have important impacts on regional and global environments. Here we comparably investigated the effects of ammonium, nitrate fertilizers and nitrification inhibitor dicyandiamide (DCD) addition on NO and N2O emissions from the agricultural soil in the North China Plain (NCP). Compared with the ammonium fertilizer application, the reductions of NO emissions caused by nitrate fertilizer and DCD addition were 100% and 93%, and of N2O emissions were 54% and 74%, respectively. Remarkable reductions of NO and N2O emissions were also observed from five different agricultural soils in the NCP by replacing ammonium with nitrate fertilizer, indicating that nitrification is the predominant process for the emissions of NO and N2O from the soils in the vast area of NCP. NO emission peaks were found to be several days later than N2O peaks after the application of ammonium fertilizer and flooding irrigation, implying that most of NO initially produced via nitrification process might be fast reduced to N2O under the high soil moisture condition. Interestingly, the relative contribution of denitrification to N2O emission showed obviously time-dependent, e.g., evident N2O emission caused by the application of nitrate was only observed after the basal fertilization for the maize and the top dressing for the wheat. Replacing ammonium with nitrate fertilizer and mixing with the nitrification inhibitor are verified to be effective measures for mitigating NO and N2O emissions from arable soils in the NCP. (C) 2016 Elsevier B.V. All rights reserved.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35711
Appears in Collections:大气环境科学实验室_期刊论文

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Recommended Citation:
Zhang, Yuanyuan,Mu, Yujing,Zhou, Yizhen,et al. NO and N2O emissions from agricultural fields in the North China Plain: Origination and mitigation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,551(0):197-204.
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