文献类型： 外文期刊
第一作者： Xu, Xiangyu
作者： Xu, Xiangyu;Zhang, Minmin;Xiong, Yousheng;Yuan, Jiafu;Xu, Xiangyu;Zhang, Minmin;Xiong, Yousheng;Yuan, Jiafu;Xu, Xiangyu;Zhang, Minmin;Xiong, Yousheng;Yuan, Jiafu;Shaaban, Muhammad;Shaaban, Muhammad;Hu, Ronggui
作者机构：
关键词： cold-waterlogged paddy field; N2O; soil temperature; nitrate; ammonium
期刊名称：FRONTIERS IN ENVIRONMENTAL SCIENCE （ 影响因子：4.581； 五年影响因子：5.039 ）
ISSN：
年卷期： 2021 年 9 卷
页码：
收录情况： SCI
摘要： Paddy fields are major sources of atmospheric N2O. Soil temperature and moisture strongly affect N2O emissions from rice fields. However, N2O emissions from cold-waterlogged paddy fields (CW), an important kind of paddy soil in China, are not well studied so far. It is unclear whether the N2O emissions from cold-waterlogged paddy fields are the same as normal paddy fields (NW). We investigated the N2O emission characteristics from the CW and NW paddy fields under with (R-1) and without (R-0) rice in Tuku Village, Baisha Town, Yangxin County (YX site, monitoring in 2013) and Huandiqiao Town, Daye City (DY site, monitoring in 2014); compared the difference and influencing factors between the CW and NW paddy fields at two sites in South China. The results showed that the N2O emissions from NWR0 were 13.4 times higher than from CWR0, and from NWR1 were 10.3 times higher than from CWR1 in the YX site. The N2O emissions from NWR0 were 2.4 times higher than from CWR0, and from NWR1 were 17.3 times higher than from CWR1 in the DY site. The structural equation models (SEMs) showed that the N2O emissions are mainly driven by rice planting and soil moisture in the NW fields at the annual scale, while soil temperature in the CW fields. Overall, N2O emissions from cold waterlogged paddy fields are significantly lower than those of normal paddy fields due to the low temperature and higher water content; however, there are dinitrogen emissions from cold waterlogged paddy fields denitrification should be further examined.
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