Unravelling substrate availability and redox interactions on methane production in peat soils of China

泥炭 缺氧水域 产甲烷 土壤水分 甲烷 溶解有机碳 氧化还原 基质(水族馆) 有机质 环境化学 二氧化碳 化学 生态学 土壤科学 环境科学 无机化学 生物 有机化学
作者
Xiaoqiao Tang,Jieyu Yu,Hongyan Wang,Amit Kumar,Mengjiao Wang,Giri Kattel,Lei Han,Junjie Lin,Zhi‐Guo Yu
出处
期刊:European Journal of Soil Science [Wiley]
卷期号:75 (1) 被引量:1
标识
DOI:10.1111/ejss.13456
摘要

Abstract The availability of electron acceptors (EAs) in peatlands determines the potential of methane (CH 4 ) formation under waterlogged conditions. Previous studies suggested that EAs can suppress CH 4 production based on Gibbs free energy under the Redox Ladder Theory. However, growing evidence challenges this theory, raising the question of how the coupling of soil substrates with EAs influences CH 4 emissions. To answer this key question, peat soils were collected across different climatic zones with different degrees of soil degradation. Anoxic incubation experiments were set up, and continuous addition of SO 4 2− , Fe 3+ and humic acid (HA) at different concentrations was followed by characterization of dissolved organic matter using fluorescence spectroscopy. Results suggest that low concentrations of SO 4 2− (1000 μmol L −1 ), Fe 3+ (100 μmol L −1 ) and HA (30 mgC L −1 ) promoted CH 4 production in most of the peat soils. With the addition of SO 4 2− and HA, increased CH 4 emissions were attributed to the facilitation of dissolved organic carbon and increased quinone‐like component C1, which increased the substrate availability for methanogenesis. Furthermore, strengthened microbial activity as indicated by fluorescence component C2 led to higher CH 4 production under Fe 3+ treatments. On the other hand, at high concentrations of SO 4 2− (5000 μmol L −1 ), Fe 3+ (500 μmol L −1 ) and HA (50 mgC L −1 ), CH 4 emissions rapidly decreased by 70.65 ± 1.57% to 96.25 ± 0.45% compared to control group without EAs addition, accompanied by increased δ 13 C‐CH 4 signatures indicating the outweighed CH 4 production under anaerobic oxidation of methane (AOM) when coupling with reduced EAs. The effect of EAs on CH 4 emissions in peat soils could also be related to lability and characteristics of natural organic matter. Our results suggest that the CH 4 production in waterlogged peatlands could be facilitated by regulating organic substrates at low EAs concentrations, but excessive EAs will reduce net CH 4 emissions through AOM. The valuable discovery of CH 4 production and oxidation processes provides insights for mitigating methane emissions from peatlands and regulating global climate change.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
guangyu完成签到,获得积分10
刚刚
学术老6完成签到,获得积分10
1秒前
c123完成签到 ,获得积分10
3秒前
恐怖稽器人完成签到,获得积分10
3秒前
WXR完成签到,获得积分10
4秒前
科研小白完成签到,获得积分10
4秒前
5秒前
可爱丸子完成签到,获得积分10
5秒前
皮汤汤完成签到 ,获得积分10
6秒前
JXDYYZK完成签到,获得积分10
7秒前
SYLH应助lu采纳,获得10
7秒前
Servant2023完成签到,获得积分10
7秒前
鸽子的迷信完成签到,获得积分10
9秒前
nine2652完成签到 ,获得积分10
10秒前
烂漫的睫毛完成签到 ,获得积分10
12秒前
量子星尘发布了新的文献求助10
12秒前
陈老太完成签到 ,获得积分10
13秒前
宇宇宇c完成签到,获得积分10
14秒前
zxt完成签到,获得积分10
15秒前
大橙子发布了新的文献求助10
18秒前
聪明静柏完成签到 ,获得积分10
20秒前
kimiwanano完成签到,获得积分10
22秒前
lu完成签到,获得积分10
23秒前
Profeto应助齐嫒琳采纳,获得10
24秒前
25秒前
情怀应助科研通管家采纳,获得10
26秒前
从来都不会放弃zr完成签到,获得积分10
30秒前
1459完成签到,获得积分10
32秒前
行者+完成签到,获得积分10
32秒前
GongSyi完成签到 ,获得积分10
33秒前
Boris完成签到 ,获得积分10
35秒前
哭泣笑柳完成签到,获得积分10
35秒前
万能图书馆应助大橙子采纳,获得10
38秒前
大眼睛土豆完成签到,获得积分10
42秒前
一条虫gg完成签到,获得积分10
45秒前
46秒前
47秒前
50秒前
大橙子发布了新的文献求助10
50秒前
dzy发布了新的文献求助10
54秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038157
求助须知:如何正确求助?哪些是违规求助? 3575869
关于积分的说明 11373842
捐赠科研通 3305650
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022