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Lin Wei, Ding Junjun, Xu Chunying, Zheng Qian, Zhuang Shan, Mao Lili, Li Qiaozhen, Liu Xiaoying, Li Yuzhong. Evaluation of N2O sources after fertilizers application in vegetable soil by dual isotopocule plots approach. ENVIRONMENTAL RESEARCH. DOI: 10.1016/j.envres.2020.109818
来源：ENVIRONMENTAL RESEARCH
发布时间：2020-09-17
作者：林伟
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| 作者: Lin, W (Lin, Wei); Ding, JJ (Ding, Junjun); Xu, CY (Xu, Chunying); Zheng, Q (Zheng, Qian); Zhuang, S (Zhuang, Shan); Mao, LL (Mao, Lili); Li, QZ (Li, Qiaozhen); Liu, XY (Liu, Xiaoying); Li, YZ (Li, Yuzhong) | ||||||||||
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| 影响因子 (2019 年): 5.715 | ||||||||||
| 摘要: Nitrogen (N) fertilizer is the major deriver of nitrous oxide (N2O) emissions in agricultural soil. In the vegetable fields in China both inorganic and organic fertilizers are largely applied as basic sources of nitrogen. Identifying the effects of fertilizer type on soil microbial activities involved in N2O emissions would be of great help for future development of N2O reduction strategies. N2O isotopocule deltas, including delta N-15(bu)lk, delta O-1(8) and SP (the N-15 site preference in N2O), have been used to analyze microbial pathways of N2O production under different treatments, including bio-organic fertilizer treatment, half bio-organic fertilizer and half urea (mixed fertilizer) treatment, urea treatment and no fertilizer treatment. We measured environmental factors, N2O fluxes and N2O isotopocule deltas to evaluate the dynamics of N2O emissions and constructed the dual isotopocule plots (delta N-15(bu)lk vs. SP and delta O-18 vs. SP) of the main N2O emission phases to assess contribution of the involved microbial processes (bacterial nitrification, bacterial denitrification, nitrifier denitrification and fungal denitrification). According to the results of the main N2O emission phases, we found that bio-organic fertilizer and mix fertilizer treatments had significantly lower N2O emissions compared to urea treatment, with average N2O fluxes of 1477 +/- 204, 1243 +/- 187 and 1941 +/- 164 mu g m(-3) h(-1), respectively, but there were no significant effects on mineral N and cabbage yield. In addition, the urea treatment and the mixed fertilizer treatment had close and higher nitrogen use efficiency. Furthermore, the delta O-18 vs. SP plot was useful for providing insight into microbial processes, showing that fungal denitrification/bacterial nitrification was the dominant microbial pathway and bio-organic fertilizer and mix fertilizer treatments had higher denitrification and N2O reduction compared to urea treatment. Those findings demonstrated that the partial replacement of urea with bio-organic fertilizer was a better choice, by means of enhancing denitrification to reduce N2O emissions and also guaranteeing the nitrogen use efficiency and the cabbage yield. | ||||||||||
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| 语言: English | ||||||||||
| 文献类型: Article | ||||||||||
| 作者关键词: Fungal denitrification; N2O reduction; N2O isotopocule Deltas; Bio-organic fertilizer; Urea | ||||||||||
| KeyWords Plus: NITROUS-OXIDE PRODUCTION; BIOORGANIC FERTILIZER; FUSARIUM-WILT; EMITTED N2O; DENITRIFICATION; EMISSION; NITRIFICATION; FRACTIONATION; BACTERIAL; AVAILABILITY | ||||||||||
| 地址: [Lin, Wei] Chinese Acad Agr Sci, Inst Urban Agr, Chengdu 610213, Peoples R China. [Ding, Junjun; Xu, Chunying; Zheng, Qian; Zhuang, Shan; Mao, Lili; Li, Qiaozhen; Liu, Xiaoying; Li, Yuzhong] Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Dryland Agr, Minist Agr & Rural Affairs Peoples Republ China, Beijing 100081, Peoples R China. [Lin, Wei; Li, Yuzhong] Chinese Acad Agr Sci, Environm Stable Isotope Lab, Beijing 100081, Peoples R China. |
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| 通讯作者地址: Li, YZ (corresponding author)，Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Dryland Agr, Minist Agr & Rural Affairs Peoples Republ China, Beijing 100081, Peoples R China. | ||||||||||
| 电子邮件地址: linwei01@www.zulkr9n.com; liyuzhong@www.zulkr9n.com | ||||||||||
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| Web of Science 类别: Environmental Sciences; Public, Environmental & Occupational Health | ||||||||||
| 研究方向: Environmental Sciences & Ecology; Public, Environmental & Occupational Health | ||||||||||
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This work was supported by The National Natural Science and Technology Foundation of China (Nos. 41473004 and 41701308), The National Key Research and Development Program of China (2017YFD0201702), The Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences (ASTIP-CAAS), and Local Financial of National Agricultural Science & Technology Center, Chengdu (NASC2020AR09). |