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Pedosphere 2003年第4期13卷 337-344页

作者： LIU Ke-Xing, LIAO Zong-Wen, WANG Sheng-Chun and YOU Zhi-LinCollege of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642 College of Natural Resources and Environment South China AyricuUural University Guangzhou 510642

Three types of paddy soils, derived from granite, Quaternary red clay andbasalt, respectively, were selected to study the effects of Fe and Mn in paddy soils on methaneproduction and emission through pot and incubation experiments. The results indicated that thedifference of Fe and Mn in paddy soils was one of the important factors causing obvious differencesin methane emission from different soil types. Soil Fe and Mn affecting methane emission from thepaddy soils was likely through affectingsoil Eh and forming Fe and Mn plagues on rice *** rates and valences of added Fe and Mn significantly affected methane production from paddysoils. Therefore, this study enhanced understanding of processes controlling methane emission frompaddy soils and may help to improve modeling and estimating regional and global methane emissionfrom paddy soils.

关键词： Fe methane emission methane production Mn paddy soil

Research Progress on methane emission from Cropland

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Agricultural Science & Technology 2017年第2期18卷 357-360,364页

作者：周艳飞金涛长江大学湿地生态与农业利用教育部工程研究中心湖北荆州434025 长江大学农学院湖北荆州434025

methane is an important greenhouse gas, and farmland is one of the im- portant emission sources of methane. Therefore, it＇s important to study the discharge of methane from cropland. This paper reviewed the methane emission from agricultural ecosystem, the factors controlling CH4 fluxes from soil, such as water regime, the soil characteristics, and the type and amount of applied fertilizers and so on, the management for mitigation of CH4 emission from cropland, especially from paddy field, and put forward some research suggestions on methane emission in the future. The objective of this paper is to provide reference for controlling methane emission in cropland.

关键词： methane emission Influence factor Cropland Research advance

Advances in methane emissions from agricultural sources:Part *** and mitigation

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Journal of Environmental Sciences 2024年第6期140卷 279-291页

作者： Xiaokun Wu Ying Zhang Yinghui Han Yagang Zhang Yuhang Zhang Xiaodan Cheng Pei Zhong Xue Yuan Yuanxun Zhang Zhengqiang Li State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071003China College of Resources and Environment University of Chinese Academy of SciencesBeijing 101408China Interdisciplinary Mathematics Institute University of South CarolinaColumbiaSC 29208United States Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China

methane is one of the major greenhouse gases(GHGs)and agriculture is recognized as its primary *** accounting is a prerequisite for developing effective agriculture mitigation *** this review,methane accounting methods and research status for various agricultural emission source including rice fields,animal enteric fermentation and livestock and poultry manure management were overview,and the influencing factors of each emission source were analyzed and *** the same time,it analyzes the different research efforts involving agricultural methane accounting and makes recommendations based on the actual ***,mitigation strategies based on accounting results and actual situation are *** review aims to provide basic data and reference for agriculture-oriented countries and regions to actively participate in climate action and carry out effective methane emission mitigation.

关键词： methane emission Agricultural sources Accounting methodology Mitigation emission influencing factors

Rumen metagenome reveals the mechanism of mitigation methane emissions by unsaturated fatty acid while maintaining the performance of dairy cows

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Animal Nutrition 2024年第3期18卷 296-308页

作者： Zhantao Yang Yuhui Zheng Siyuan Liu Tian Xie Qianqian Wang Zhonghan Wang Shengli Li Wei Wang State Key Laboratory of Animal Nutrition and Feeding Beijing Engineering Technology Research Center of Raw Milk Quality and Safety ControlCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China

Dietary fat content can reduce the methane production of dairy cows;however,the relevance fatty acid(FA)composition has towards this inhibitory effect is ***,in-depth studies elucidating the effects of unsaturated fatty acids(UFA)on rumen function and the mechanism of reducing methane(CH4)production are *** study exposed 10 Holstein cows with the same parity,similar milk yield to two total mixed rations:low unsaturated FA(LUFA)and high unsaturated FA(HUFA)with similar fat *** LUFA group mainly added fat powder(C16:0>90%),and the HUFA group mainly replaced fat powder with extruded *** experiment lasted 26 d,the last 5 d of which,gas exchange in respiratory chambers was conducted to measure gas *** found that an increase in the UFA in diet did not affect milk production(P>0.05)and could align the profile of milk FAs more closely with modern human nutritional ***,we found that increasing the UFA content in the diet lead to a decrease in the abundance of Methanobrevibacter in the rumen(|linear discriminant analysis[LDA]score|>2 and P 2 and Pemission reduction measures for dairy cows.

关键词： methane emission Rumen metagenome Dairy cow Unsaturated fatty acid

Salinity causes differences in stratigraphic methane sources and sinks

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Environmental Science and Ecotechnology 2024年第3期19卷 141-151页

作者： Ying Qu Yuxiang Zhao Xiangwu Yao Jiaqi Wang Zishu Liu Yi Hong Ping Zheng Lizhong Wang Baolan Hu Department of Environmental Engineering Zhejiang UniversityHangzhouChina Ocean College Zhejiang UniversityZhoushanChina Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety HangzhouChina

methane metabolism,driven by methanogenic and methanotrophic microorganisms,plays a pivotal role in the carbon *** seawater intrusion and soil salinization rise due to global environmental shifts,understanding how salinity affects methane emissions,especially in deep strata,becomes ***,insights into stratigraphic methane release under varying salinity conditions remain *** we investigate the effects of salinity on methane metabolism across terrestrial and coastal strata(15-40 m depth)through in situ and microcosm simulation *** strata,exhibiting a salinity level five times greater than terrestrial strata,manifested a 12.05%decrease in total methane production,but a staggering 687.34%surge in methane oxidation,culminating in 146.31%diminished methane *** emerged as a significant factor shaping the methane-metabolizing microbial community's dynamics,impacting the methanogenic archaeal,methanotrophic archaeal,and methanotrophic bacterial communities by 16.53%,27.25%,and 22.94%,***,microbial interactions influenced strata system methane *** pathway analyses suggested Atribacteria JS1's potential role in organic matter decomposition,facilitating methane production via *** study thus offers a comprehensive lens to comprehend stratigraphic methane emission dynamics and the overarching factors modulating them.

关键词： Shallow gas strata Salinity methane emission Microbial community Microbial interactions

methane emissions from rice fields under continuous straw return in the middle-lower reaches of the Yangtze River

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Journal of Environmental Sciences 2013年第9期25卷 1874-1881页

作者： Pengfu Hou Ganghua Li Shaohua Wang Xin Jin Yiming Yang Xiaoting Chen Chengqiang Ding Zhenghui Liu Yanfeng Ding College of Agronomy Nanjing Agricultural University Key Laboratory of Crop Physiology Ecology and Production Management Ministry of Agriculture

A three-year experiment was conducted in the middle-lower reaches of the Yangtze River in China to study the influence of continuous wheat straw return during the rice season and continuous rice straw return in wheat on methane （CH 4 ） emissions from rice fields in which, the rice-wheat rotation system is the most dominant planting pattern. The field experiment was initiated in October 2009 and has continued since the wheat-growing season of that year. The analyses for the present study were conducted in the second （2011） and third （2012） rice growing seasons. Four treatments, namely, the continuous return of wheat straw and rice straw in every season （WR）, of rice straw but no wheat straw return （R）, of wheat straw but no rice straw return （W） and a control with no straw return （CK）, were laid out in a randomized split-plot design. The total seasonal CH 4 emissions ranged from 107.4 to 491.7 kg/ha （2011） and 160.3 to 909.6 kg/ha （2012）. The increase in CH 4 emissions for treatments WR and W were 289% and 230% in the second year and 185% and 225% in the third year, respectively, in relation to CK. We observed less methane emissions in the treatment R than in CK by 14%-43%, but not statistically significant. Treatment R could increase rice productivity while no more CH 4 emission occurs. The difference in the total CH 4 emissions mainly related to a difference in the methane flux rate during the first 30-35 days after transplant in the rice growing season, which was caused by the amount of dissolved oxygen in paddy water and the amount of reducible soil materials.

关键词： methane emission rice or wheat straw continuous returning dissolved oxygen of paddy water soil redox potential

Importance of periphytic biofilms for carbon cycling in paddy fields:A review

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Pedosphere 2024年第1期34卷 36-43页

作者： Lei ZHOU Yonghong WU Junzhuo LIU Pengfei SUN Ying XU Jan DOLFING Robert GMSPENCER Erik JEPPESEN State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Zigui Three Gorges Reservoir Ecosystem Observation and Research Station of Ministry of Water Resources of the People's Republic of ChinaYichang 443605China College of Nanjing University of Chinese Academy of SciencesNanjing 211135China Faculty of Energy and Environment Northumbria UniversityNewcastle upon Tyne NE18QHUK Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee FL 32306USA Department of Ecoscience&Centre for Water Technology(WATEC) Aarhus UniversityAarhus DK-8000Denmark Sino-Danish Centre for Education and Research Beijing 100049China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and Implementation(EKOSAM)Middle East Technical UniversityAnkara 06800Turkiye Institute of Marine Sciences Middle East Technical UniversityMersin 33731Turkiye

Paddy fields play an important role in global carbon(C) cycling and are an important source of methane(CH_(4)) emissions. Insights into the processes influencing the dynamics of soil organic C(SOC) in paddy fields are essential for maintaining global soil C stocks and mitigating climate change. Periphytic biofilms composed of microalgae, bacteria, and other microorganisms are ubiquitous in paddy fields, where they directly mediate the transfer of elements at the soil-water interface. However, their contributions to C turnover and exchange have been largely neglected. Periphytic biofilms affect and participate in soil C dynamics by altering both abiotic(e.g., pH and redox potential) and biotic conditions(e.g., microbial community composition and metabolism). This review summarizes the contributions of periphytic biofilms to soil C cycling processes, including carbon dioxide fixation, SOC mineralization, and CH_(4) emissions. Future research should be focused on: i) the mechanisms underlying periphytic biofilm-induced C fixation and turnover and ii) quantifying the contributions of periphytic biofilms to soil C uptake, stabilization, and sequestration in paddy fields.

关键词： carbon fixation carbon mineralization carbon sequestration methane emission microbial aggregates soil organic carbon

methane emissions from shale gas production sites in southern Sichuan,China:A field trial of methods

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气候变化研究进展:英文版 2023年第4期14卷 624-631页

作者： Ming XUE Xing-CHUN Li Yi-Wei ZHAO Dong-Dong CAO Xiang-Yu CUI Guang-Quan LIU Qian DING State Key Laboratory of Petroleum Pollution Control Beijing 102206China CNPC Research Institute of Safety and Environmental Technology Beijing 102206China Petroleum Exploration and Production Research Institute SINOPECBeijing 102206China

Shale gas is an important alternative natural gas source that can meet China's growing energy ***,methane emissions during shale gas production could largely determine whether it could be considered as a bridging clean energy *** this study,we performed methane emission measurements using three methods(on-site optical gas imaging,on-site methane patrolling,and downwind measurement)at shale gas production sites in Sichuan province,China,covering 18 well sites with 81 *** results showed that flowback water tanks were the major methane sources,with valves,separators,chemical injection pumps,and pneumatic controllers as other *** methane concentrations inside the 18 sites ranged from 1.42 to 459μmol mol−1,with over 59%of the sites having the highest concentration less than 50μmol mol−*** optical gas imaging method,with its low detection limit over 5000μmol mol−1,could not capture the emission *** three successful downwind measurements resulted in site level emission rates between 0.02 and 0.17 kg h−*** divided by the number of wells at each site,the emission intensity was 4%–28%of the wellhead emission factor for natural gas production in *** measurements are required to better quantify methane emissions from shale gas sites in *** sites in mountainous regions or long-term low-wind regions,detection methods other than downwind measurements should be suitable for quantifying site-level emissions.

关键词： methane emission Shale gas On-site methane patrolling Downwind measurements emission factor

Geological emission of methane from the Yakela condensed oil/gas field in Talimu Basin, Xinjiang, China

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Journal of Environmental Sciences 2008年第9期20卷 1055-1062页

作者： Tang Junhong Bao Zhengyu Xiang Wu Gou Qinghong China Univ Geosci Minist Educ Key Lab Biogeol & Environm Geol Wuhan 430074 Peoples R China Hangzhou Dianzi Univ Dept Environm Engn & Sci Hangzhou 310018 Peoples R China Sun Yat Sen Univ Dept Earth Sci Guangzhou 510275 Guangdong Peoples R China

A static flux chamber method was applied to study natural emissions of methane into the atmosphere in the Yakela condensed oil/gas field in Talimu Basin, Xinjiang, China. Using an online method, which couples a gas chromatography/high-temperature conversion/isotope ratio mass spectrometry (GC/C/MS) together, the 13C/12C ratios of methane in the flux chambers were measured. The results demonstrated that methane gases were liable to migrate from deep oil/gas reservoir to the surface through microseepage and p...

关键词： the Yakela condensed oil/gas field methane emission stable carbon isotopes flux chamber