N2O emissions and product ratios of nitrification and denitrification are altered by K fertilizer in acidic agricultural soils
文献类型：期刊论文
| 作者 | Li, Zhiguo2,3; Xia, Shujie3; Zhang, Runhua1; Zhang, Runqin3; Chen, Fang2,3; Liu, Yi2,3 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 265页码:8 |
| ISSN号 | 0269-7491 |
| 关键词 | Nitrogen transformation process Greenhouse gas Nitrogen cycle Potassium fertilizer management N-15 tracer |
| DOI | 10.1016/j.envpol.2020.115065 |
| 英文摘要 | Potassium (K) fertilizer plays an important role in increasing crop yield, quality, and nitrogen use efficiency. However, little is known about its environmental impacts, such as its effects on emissions of the greenhouse gas nitrous oxide (N2O). A nitrogen-15 (N-15) tracer laboratory experiment was therefore performed in an acidic agricultural soil in the suburbs of Wuhan, central China, to determine the effects of K fertilizer on N2O emissions and nitrification/denitrification product ratios under N fertilization. During 15-d incubation periods with a fixed initial N concentration (80 mg kg(-1)), K application increased average N2O emission rates significantly (1.6-10.8-fold) compared to the control treatment. N2O emissions derived from nitrification and denitrification both increased in K-treated soil, and denitrification contributed more to the increase; its contribution ratio rose from 32% without K fertilizer to 53% with 300 mg kg(-1) of K applied. The increase in N2O emissions under K fertilization is probably due to an increase in the activity of denitrifying microorganisms and acid-resistant nitrifying microorganisms caused by higher K+ concentrations and lower soil pH. Combined treatment with potassium chloride (KCl) and N fertilizer produced lower N2O emissions than combined treatment with potassium sulfate (K2SO4) and N fertilizer during 15-d incubation periods. Our results imply that there are significant interaction effects between N fertilizers and K fertilizers on N2O emissions. In particular, combining N fertilizers with fertilizers that reduce soil acidity or contain Cl or K ions may significantly affect agricultural N2O emissions. (C) 2020 Elsevier Ltd. All rights reserved. |
| 资助项目 | National Key Research and Development Program of China[2016YFD0200108] ; National Natural Science Foundation of China[41501313] ; Knowledge Innovative Program of the Chinese Academy of Sciences[Y455434I02] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000564558300017 |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/15632]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Liu, Yi |
| 作者单位 | 1.Wuhan Acad Agr Sci & Technol, Vegetable Res Inst, Wuhan 430345, Peoples R China 2.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhiguo,Xia, Shujie,Zhang, Runhua,et al. N2O emissions and product ratios of nitrification and denitrification are altered by K fertilizer in acidic agricultural soils[J]. ENVIRONMENTAL POLLUTION,2020,265:8. |
| APA | Li, Zhiguo,Xia, Shujie,Zhang, Runhua,Zhang, Runqin,Chen, Fang,&Liu, Yi.(2020).N2O emissions and product ratios of nitrification and denitrification are altered by K fertilizer in acidic agricultural soils.ENVIRONMENTAL POLLUTION,265,8. |
| MLA | Li, Zhiguo,et al."N2O emissions and product ratios of nitrification and denitrification are altered by K fertilizer in acidic agricultural soils".ENVIRONMENTAL POLLUTION 265(2020):8. |
入库方式： OAI收割
来源：武汉植物园
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