文献类型：期刊文献

英文题名：Waterlogging affects the mitigation of soil GHG emissions by biochar amendment in coastal wetland

作者：Yan, Zhongqing[1,2,3] Wang, Jinzhi[1,2,3] Li, Yong[1,2,3] Wu, Haidong[1,2,3] Zhang, Kerou[1,2,3] Yan, Liang[1,2,3] Zhang, Xiaodong[1,2,3] Kang, Xiaoming[1,2,3]

第一作者：Yan, Zhongqing;闫钟清

通信作者：Kang, XM[1];Kang, XM[2];Kang, XM[3]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China;[2]Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China;[3]Sichuan Zoige Wetland Ecosyst Res Stn, Zoige 624500, Sichuan, Peoples R China

年份：2020

卷号：20

期号：10

起止页码：3591-3606

外文期刊名：JOURNAL OF SOILS AND SEDIMENTS

收录：;Scopus(收录号：2-s2.0-85087420211);WOS:【SCI-EXPANDED(收录号:WOS:000544562800001)】；

基金：This study was funded by the National Key Research and Development Program of China (grant number 2017YFC0506203), the National Nonprofit Institute Research Grant (grant numbers CAFYBB2019SY030, CAFYBB2017QB009), and the National Natural Science Foundation of China (grant numbers 41701113, 41877421, 31,770,511).

语种：英文

外文关键词：Biochar; Waterlogging; Greenhouse gas fluxes; Global warming potential; Yellow River Delta wetland

摘要：Purpose Emissions of greenhouse gases (GHGs) have greatly impacted the global warming by altering the composition of the atmosphere. The effect of biochar on GHG mitigation has been mainly studied in amended mineral soils and agricultural soils. However, the interactive effects of waterlogging and biochar application on GHG emissions, in coastal wetlands, are still poorly understood, which is important when considering the application of biochar at specific sites. Materials and methods We carried out a soil incubation experiment for 90 days at 25 degrees C to investigate the effects of two types of biochar (Phragmites communisandSpartina alterniflora) with different application rates (0%, 1%, 5%, and 10%) (w/w) on GHG emissions from soil at two different water levels (unwaterlogged and waterlogged soils). Furthermore, soil pH, organic carbon, nitrogen, and phosphorus contents were analyzed after incubation to gain insights into the underlying mechanisms of the biochar's effects on CO2, CH4, and N2O evolution. Results and discussion Waterlogging significantly reduced the cumulative CO2 flux by 36.27%, had no effect on cumulative CH4 flux, and significantly increased cumulative N2O flux by 50.82%, and the corresponding global warming potential (GWP) significantly decreased by 29.72%. Biochar application reduced not only the cumulative CO2 flux, but also the cumulative CH4 absorption, which may shift soils from being CH4 sinks to sources. After biochar application, the cumulative N2O release increased from unwaterlogged soils but decreased in waterlogged soils. There was no significant difference between biochar type on GHG emissions, but differences were observed among different application rates. The GWP significantly decreased by 27.64-69.39% and 36.11-87.34% after biochar application in the unwaterlogged and waterlogged soils, respectively. Conclusions As a consequence, biochar application may significantly decrease GWP of soils due to the large reduction of CO2 release. These results suggest that biochar application is an effective way to reduce GWP in the Yellow River Delta Wetlands, especially when biochar is applied in waterlogged soils at high application rates.