Knowledge Management System Of Institute Of Botany,CAS
Evaluating wetland soil carbon stability related to iron transformation during redox oscillations | |
Wang, Yiyun1,2; Liu, Xiaoqing1; Zhang, Xinying1; Dai, Guohua; Wang, Zhiheng3,4; Feng, Xiaojuan1,5 | |
2022 | |
发表期刊 | GEODERMA |
ISSN | 0016-7061 |
卷号 | 428 |
摘要 | Redox shifts threaten to reduce the massive soil organic carbon (SOC) stocks in wetlands. However, ferrous iron [Fe(II)] oxidation may stabilize wetland SOC by reducing phenol oxidative activity, inhibiting CO2 emissions, and promoting SOC association with ferric Fe [Fe(III)] (oxyhydr)oxides. Yet the prevalence and efficacy of this mechanism are not clear. Here we select six contrasting soils from fens and bogs with different pH for microcosm incubation under cyclic redox conditions, with or without Fe(II) addition, and compared to static oxic incubation. CO2 emissions, microbial composition, enzyme activities, Fe species, and organic matter properties were measured to test the related mechanism. We found that compared to static oxic conditions, the response of Fe(II) to cyclic redox conditions (indicated by the response ratio of -0.48 to 0.53) was positively correlated with that of phenol oxidative activity and cumulative CO2 at the end of the incubation. Redox cycling had little effect on Febound SOC (assessed by the modified citrate-bicarbonate-dithionite extraction), although Fe(II) addition increased Fe-bound SOC in all soils under cyclic redox owing to the production of short-range-ordered Fe(III) (oxyhydr)oxides (quantified by oxalate extraction). Furthermore, Fe(II) addition decreased CO2 emissions from three soils with pH > 6 but increased CO2 emissions from the Sphagnum-dominated soil, which had elevated Fe (II) levels after the incubation. These findings highlight the SOC stabilization potential of Fe(II) addition to wetland soils experiencing redox oscillations by promoting the accumulation of Fe-bound SOC as well as decreasing CO2 emissions (in response to phenol oxidative activity), especially in non-Sphagnum-dominated freshwater wetlands with relatively high pH. |
关键词 | Cyclic redox Iron -bound organic carbon CO 2 emissions Fen Bog |
学科领域 | Soil Science |
DOI | 10.1016/j.geoderma.2022.116222 |
收录类别 | SCI |
语种 | 英语 |
WOS关键词 | ORGANIC-MATTER DECOMPOSITION ; SORPTIVE STABILIZATION ; FERRIHYDRITE ; PRESERVATION ; OXIDATION ; GOETHITE ; OXYGEN ; OXIDE ; FE ; ASSOCIATIONS |
WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
WOS记录号 | WOS:000919522500006 |
出版者 | ELSEVIER |
文献子类 | Article |
出版地 | AMSTERDAM |
EISSN | 1872-6259 |
资助机构 | National Natural Science Foundation of China ; [42025303] ; [31988102] ; [41773067] |
作者邮箱 | xfeng@ibcas.ac.cn |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/28968 |
专题 | 植被与环境变化国家重点实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China 4.Peking Univ, Inst Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China 5.Peking Univ, Coll Urban & Environm Sci, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China 6.Chinese Acad Sci, Inst Bot, 20 Nanxincun Xiangshan, Beijing 100093, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Yiyun,Liu, Xiaoqing,Zhang, Xinying,et al. Evaluating wetland soil carbon stability related to iron transformation during redox oscillations[J]. GEODERMA,2022,428. |
APA | Wang, Yiyun,Liu, Xiaoqing,Zhang, Xinying,Dai, Guohua,Wang, Zhiheng,&Feng, Xiaojuan.(2022).Evaluating wetland soil carbon stability related to iron transformation during redox oscillations.GEODERMA,428. |
MLA | Wang, Yiyun,et al."Evaluating wetland soil carbon stability related to iron transformation during redox oscillations".GEODERMA 428(2022). |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
1-s2.0-S001670612200(5320KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论