Water regime-nitrogen fertilizer incorporation interaction: Field study on methane and nitrous oxide emissions from a rice agroecosystem in Harbin, China
文献类型： 外文期刊
作者： Dong, Wenjun 1 ; Guo, Jia 5 ; Xu, Lijun 7 ; Song, Zhifeng 8 ; Zhang, Jun 9 ; Tang, Ao 2 ; Zhang, Xijuan 2 ; Leng, Chunxu; 1 ;
作者机构： 1.Heilongjiang Acad Agr Sci Postdoctoral Programme, Harbin 150086, Heilongjiang, Peoples R China
2.Heilongjiang Acad Agr Sci, Cultivat & Farming Res Inst, Harbin 150086, Heilongjiang, Peoples R China
3.Chinese Acad Sci, Northern Japon Rice Mol Breeding Joint Res Ctr, Harbin 150086, Heilongjiang, Peoples R China
4.Minist Agr, Sci Observing & Expt Stn Crop Cultivat Northeast, Harbin 150086, Heilongjiang, Peoples R China
5.Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China
6.Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China
7.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
8.Jilin Acad Agr Sci, Changchun 130124, Jilin, Peoples R China
9.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China
10.Heilongjiang Acad Agr Sci, Rice Inst Wuchang, Wuchang 150229, Peoples R China
关键词： Methane (CH4); Nitrous oxide (N2O); Rice ecosystem; Cold region; Global warming potential
期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCES （ 影响因子：5.565； 五年影响因子：5.066 ）
ISSN： 1001-0742
年卷期： 2018 年 64 卷
页码：
收录情况： SCI
摘要： Water regime and nitrogen (N) fertilizer are two important factors impacting greenhouse gases (GHG) emission from paddy field, whereas their effects have not been well studied in cold region. In this study, we conducted a two-year field experiment to study the impacts of water regime and N fertilizer on rice yields and GHG emissions in Harbin, China, a cold region located in high latitudes. Our results showed that intermittent irrigation significantly decreased methane (CH4) emission compared with continuous flooding, however, the decrement was far lower than the global average level. The N2O emissions were very small when flooded but peaked at the beginning of the disappearance of floodwater. The N fertilizer treatments increased CH4 emissions at low level (75 kg N/ha). But both CH4 and N2O emissions were uninfluenced at the levels of 150 kg N/ha and 225 kg N/ha. Rice yields increased under intermittent irrigation and were highest at the level of 150 kg N/ha. From our results, we recommended that the intermittent irrigation and 150 kg N/ha as the ideal water regime-nitrogen fertilizer incorporation for this area to achieve low GHG emissions without impacting rice yields. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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