Acclimation of methane emissions from rice paddy fields to straw addition

文献类型： 外文期刊

第一作者： Jiang, Yu

作者： Jiang, Yu;Qian, Haoyu;Zhang, Jun;Deng, Aixing;Zhang, Weijian;Jiang, Yu;van Groenigen, Kees Jan;Huang, Shan;Huang, Shan;Zhang, Xingyue;Wang, Ling;Zhang, Li;Shen, Mingxing;Lu, Changying;Xiao, Xiaoping;Li, Chao;Chen, Fu;Zhang, Hailin

作者机构：

期刊名称：SCIENCE ADVANCES （ 影响因子：14.136； 五年影响因子：16.446 ）

ISSN： 2375-2548

年卷期： 2019 年 5 卷 1 期

页码：

收录情况： SCI

摘要： Straw incorporation is a common long-term practice to improve soil fertility in croplands worldwide. However, straw amendments often increase methane (CH4) emissions from rice paddies, one of the main sources of anthropogenic CH4. Intergovernmental Panel on Climate Change (IPCC) methodologies to estimate CH4 emissions from rice agriculture assume that the effect of straw addition remains constant over time. Here, we show through a series of experiments and meta-analysis that these CH4 emissions acclimate. Effects of long-term (>5 years) straw application on CH4 emissions were, on average, 48% lower than IPCC estimates. Long-term straw incorporation increased soil methanotrophic abundance and rice root size, suggesting an increase in CH4 oxidation rates through improved O-2 transport into the rhizosphere. Our results suggest that recent model projections may have overestimated CH4 emissions from rice agriculture and that CH4 emission estimates can be improved by considering the duration of straw incorporation and other management practices.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序