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

第一作者： Dong, Wenjun

作者： Dong, Wenjun;Dong, Wenjun;Tang, Ao;Zhang, Xijuan;Leng, Chunxu;Liu, Youhong;Wang, Lianmin;Wang, Lizhi;Yu, Yang;Meng, Ying;Lai, Yongcai;Dong, Wenjun;Zhang, Xijuan;Dong, Wenjun;Guo, Jia;Yu, Yilei;Guo, Jia;Yu, Yilei;Xu, Lijun;Song, Zhifeng;Zhang, Jun;Yang, Zhongliang

作者机构：

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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