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methane emission from Rice Fields:Necessity for Molecular Approach for Mitigation

Rice science 2024年第2期31卷 159-178页

作者： Sujeevan RAJENDRAN Hyeonseo PARK Jiyoung KIM Soon Ju PARK Dongjin SHIN Jong-Hee LEE Young Hun SONG Nam-Chon PAEK Chul Min KIM Department of Horticulture Industry Wonkwang UniversityIksan 54538Korea Plant Molecular Biology and Biotechnology Research Center Gyeongsang National UniversityJinju 52828Korea Department of Southern Area Crop Science National Institute of Crop ScienceMiryang 50424Korea Department of Agricultural Biotechnology Seoul National UniversitySeoul 08826Korea Department of Plant Science Plant Genomics and Breeding InstituteResearch Institute of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Korea

Anthropogenic methane emissions are a leading cause of the increase in global averagetemperatures,often referred to as global *** soils play a significant role in methaneproduction,where the anaerobic conditions promote the production of methane by *** fields contribute a considerable portion of agricultural methane emissions,as riceplants provide both factors that enhance and limit methane *** plants harbor both methaneproducingand methane-oxidizing *** from rice roots provide source for methaneproduction,while oxygen delivered from the root aerenchyma enhances methane *** haveshown that the diversity of these microorganisms depends on rice cultivars with some genes characterizedas harboring specific groups of microorganisms related to methane ***,there is still aneed for research to determine the balance between methane production and oxidation,as rice plantspossess the ability to regulate net methane *** agronomical practices,such as fertilizerand water management,have been employed to mitigate methane ***,studiescorrelating agronomic and chemical management of methane with productivity are ***,evidences for breeding low-methane-emitting rice varieties are scattered largely due to the absence ofcoordinated breeding *** has indicated that phenotypic characteristics,such as rootbiomass,shoot architecture,and aerenchyma,are highly correlated with methane *** reviewdiscusses available studies that involve the correlation between plant characteristics and *** emphasizes the necessity and importance of breeding low-methane-emitting rice varieties inaddition to existing agronomic,biological,and chemical *** review also delves into the idealphenotypic and physiological characteristics of low-methane-emitting rice and potential breeding techniques,drawing from studies conducted

关键词： methane emission rice breeding aerenchyma greenhouse gas radial oxygen loss

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methane emission from Natural Wetlands in China:Summary of Years 1995-2004 Studies

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Pedosphere 2007年第4期17卷 475-486页

作者： DING Wei-Xin CAI Zu-Cong State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China）.

From studies undertaken during 1995-2004, annual budgets of CH4 emissions from natural wetlands and its temporal and spatial variations were examined throughout China, and various factors influencing CH4 emissions were also evaluated. The seasonal variation in CH4 emissions that increased with increasing plant growth reached its peak in August; decrease in the emissions was found in freshwater marshes but not in peatlands. emissions were mainly controlled by temperature and depth of standing water. Low CH4 emissions at the early plant growing stages were not because of deficiency of organic C for CH4 production but because of low temperatures. Low temperatures not only reduced CH4 production but also stimulated CH4 oxidation by lowering the activity of other aerobic microbes which left more 02 in the rhizosphere for methanotrophs. Low summer temperatures （below 20 ℃） in the Qinghai-Tibetan Plateau lowered CH4 production and CH4 emission resulting in little or no seasonal variation of emissions. Diel and spatial variation in CH4 emissions depended on plant species. For plants that transport CH4 using the pressure-driven convective through-flow mechanism, diel variation in CH4 emissions was governed by diel variation of solar energy load （that produces temperature and vapor pressure differences within various plant tissues） and stomatal conductance. For plants that transport gases using the molecular diffusion mechanism only, the diel variation of CH4 emissions was because of differences in the magnitude of O2 produced through photosynthesis and then delivered into the rhizomes and/or rhizosphere for CH4 oxidation. Emergent plants could transport more CH4 than submerged plants because the former transport CH4 directly into the atmosphere rather than into water as do submerged plants where CH4 can be further be oxidized during its diffusion from water to the atmosphere. Emergent plants with high gas transport capacity could not only transport more CH4 into the atmosphe

关键词： diel variation methane emission seasonal variation temporal variation wetland

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methane emission in a rice field of Thailand

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Journal of Environmental Sciences 1996年第1期8卷 38-47页

作者： Rong Xiang Chuen-How Ng (Environmental Engineering Program, School of Environment,Resources and Development,Asian Institute of Technology, Bangkok 10501,Thailand)Su Weihan(Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences,Beijin Envmtl Eng Program Sch of Envmt Asian Inst of Technology Bangkok 10501 Thailand

In this study, emission of methane have been measured in a Thai rice field. Clear patterns of diurnal variations of methane emission have been observed and were found to follow the diurnal variation of the soil temperature. A detailed explanation was given for explaining the occurrence of a methane emission peak at *** effects of urea fertilization and field draining on methane emissions were discussed. methane emission from Thai rice fields is estimated to be 3. 32 Tg CH_4(2. 49 Tg CH_4-C) each year , contributing about 3. 4% to global methane budget due to rice cultivation.

关键词： methane emission rice field greenhouse gas.

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Effect　of　Land　Use　History　on　methane　emission　and　Methanogenic　Flora　in　Flooded　Soils

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Pedosphere 1996年第1期6卷 73-80页

作者： MINHANG CHENMEICI 等 DepartmentofEnvironmentalScience ZhejiangAgriculturalUniversityHangzhou310029China DepartmentofEnvi

The characteristics of methane emission were compared among six types of upland and paddy soils developed from different parent materials with distinct physics and chemical properties after planting rice. The fluxes of methane emission in submerged soils from the upland were obviously lower than those from the paddy rice field. The flux of methane emission in the paddy soil developed from fluvo-aquic soil was the largest among all the types of soils. Planting of rice was helpful to emission of methane in soils. The amounts of various groups of methanogenic flora were conformed with the deferences among the fluxes of methane emission in various types of soils. methane formation was observed in each type Of air-dried soils stored for a long time after addition of water and incubation at 35℃.

关键词： air-dried soil methane emission methanogenic flora methanogensis

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Studies on Technique of Reducing methane emission in a Rice-Duck Ecological System and the Evaluation of Its Economic Significance

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Agricultural Sciences in China 2006年第10期5卷 758-766页

作者： XIANG Ping-an HUANG Huang HUANG Mei GAN De-xin ZHOU Yan FU Zhi-qiang College of Agronomy Hunan Agricultural University Changsha 410128 P.R.China Departement of Architecture Changsha University of Science and Technology Changsha 410076 P.R.China College of Horiculture and Gardening Hunan Agricultural University Changsha 410128 P.R.China Technical Center of Changsha Cigarette Factory Changsha 410014 P.R.China

The rice-duck ecological system is one of the major practices of the traditional Chinese agriculture. A study on the effect of reducing methane emission using this practice provided theoretical and practical basis for further development and utilization of this classical agricultural technique. The effect of reducing methane emission and the economic benefits of rice-duck ecological system were studied by carrying out a field experiment and by using economic methodology. The daily variation of CH4 emission in late rice paddy field was basically consistent with the daily variation of atmospheric temperature. The highest emission occurred at the full tillering stage of late rice with a rate of 24.1 or 32.2 or 40.5 mg m^-2 h^-1 in no-tillage area with duck and no-tillage area without duck and conventional-tillage area without duck, respectively. The inhibition of methane emission was apparently effective in the rice-duck ecological system during the initial tillering stage and the full tillering stage. Compared to the no-tillage area without duck, methane emission decreased by 2.333 g m^-2. Compared to the conventional-tillage area without duck, methane emission decreased by 4.723 g m^-2. During the production period of late rice, the amount of methane emission in no-tillage area with duck was 3.373 g m^-2 lesser than that of no-tillage area without duck, and 5.59 g m^-2 less than that of conventional-tillage without duck area. The economic significance was analyzed. Farmers adopting the rice-duck ecological system obtained 2 166 and 4 207 RMB yuan ha^-1 more income than those who adopted a no-tillage without duck technique or conventional-tillage without duck technique, respectively. In addition to the reduction of the environmental pollution by methane emission, the farmers who adopted the rice-duck ecological system achieved economic benefits of 5 000 RMB yuan ha^-1, which was 2 206 and 4 274 RMB yuan ha^-1 more than those who adopted a no-tillage without duck techn

关键词： no-tillage late rice rice-duck system methane emission mitigation options economic evaluation

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Comparison of Manual and Automatic Methods for Measurement of methane emission from Rice Paddy Fields

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Advances in Atmospheric Sciences 1998年第4期15卷 139-149页

作者：郑循华王明星王跃思沈壬兴李晶 Institute of Atmospheric Physics Chinese Academy of Sciences Beijing Fraunhofer Institute of Atmospheric Environmental Research Garmisch Germany Wuxian Institute for Agriculture Sciences Suzhou P. R. China

S The methane emission flux from rice paddies was simultaneously measured with automatic and manual methods in the suburban of Suzhou. Both methods were based on the static chamber/GC-FID techniques. Detail analysis of the experimental results indicates: a) The data of methane emission measured with the automatic method is reliable. b) About 11 or 19 o′clock of local time is recommended as the optimum sampling time for the manual spot measurement of methane emission from rice paddies. The methane emission fluxes measured by manual sampling at local time other than the optimum time have to be corrected. The correction coefficient may be determined by automatic and continuous measurement. c) In order to get a more accurate result, an empirical correction factor, such as 18%, is recommended to correct the seasonally total amount of measured methane emission by enlarging the automatically measured data or reducing the manually measured ones.

关键词： methane emission Automatic method Manual method Rice paddy

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Effect of different fertilizers on methane emission from a paddy field of Zhejiang, China

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Journal of Environmental Sciences 1999年第4期11卷 457-461页

作者： Ibrahim Traore, SHEN Dong\|sheng, MIN Hang, CHEN Mei\|ci, FENG Xiao\|shan (Department of Environmental Sciences, Zhejiang University,Hangzhou 310029, China) 浙江大学环境保护系浙江杭州浙江农业大学环境保护系浙江杭州

methane emissions from Chinese paddy soil (Zhejiang Province) were measured over the rice growing seasons. Different fertilizers (organic and chemical) were applied, emissions of methane were high during two periods(5 days after peak tillering and 7 days after heading flowering stage) and significant effect of fertilizers was observed. Methanogenic activities in soils treated with organic manures were obviously higher than those with chemical fertilizers. Among the organic manured fields the maximum methane emission from green manure, biogas residue and beef manure treatment were 52, 20 and 19 times respectively of that given by control, and among chemical fertilizers it was NH\-4HCO\-3>CO(NH 2) 2>(NH 4) 2SO 4>NH 4Cl>NaNO 3 with 2\^4, 2, 1\^5,1\^3 and 0\^2 times respectively of that from control.

关键词： methane emission field methanogenic flora flooded rice organic and chemical fertilizer

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Effect of Combined Application of Organic and Inorganic Fertilizers on methane emission from Paddy Soil and Rice Growth

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Pedosphere 1997年第4期7卷 379-382页

作者： LIUKEXING LIAOZHONGWEN 等 CollegeofNaturalResourcesandEnvironment SouthChinaAgric.Univ.Guangzhou510642（China） CollegeofNatural

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Biological Characteristies of methane emission of Oryzasativa，Panicumcrus－galliand Cyperusdif for misGrown on PaddySoil

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Pedosphere 1994年第2期4卷 165-172页

作者： MINHANG CHENMEI－CI 等 DepartmentofEnvironmentalScience ZhejiangAgriculturalUniversityHangzhou310029China DepartmentofEnvi

Biological characteristics of methane emission were compared among Oryza sativa, Panicum crus-galli andCyperus difformis grown on paddy soil. The order of the amounts of methane emitted was P. crus-galli > O. sativa >C. difformis, with the former two 11 and 8 times as much as that of the latter, respectively. And it was just opposite tothat of the methane-forming activities of roots of the three plants. The diurnal changes of methane emission of thethree plants were relatively consistent with valleys during 11:00-14:00 and midnight and peaks during 8:00-11: 00,14:00- 20:00 and about 5:00 early morning. The methanogenic activites in rhizospheric soils were higher than those innonrhizospheric soils with P. crus-galli and O. sativa, but not with C. difformis. The pathways of methane release ofP. crus-galli and O . sativa were probably through the top gaps near the junctions of nodal plate and leaf sheath, how-ever in C. difformistopgaps from which methane could escape into atmosphere were not found.

关键词： activity of methane formation Cyperus difformis methane emission Oryza sativa Panicum crus-galli

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Simplied Model to Predict methane emission From Longwall Panel Based on methane emission Rate

Simplied Model to Predict Methane Emission From Longwall Pan...

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2004安全科学与技术国际会议

作者： LIU Kegong1 WANG Jiacheng1 & QU Fang2 (1 School of Energy & engineering China University of Mining and Technology Beijing 100083 China) (2 School of Metrological Technology & Engineering China Jiliang University Hangzhou 310018 Zhejiang China)

The structure of coal contains both micropores and macropores in which the methane remains as free gas and adsorbed phase. These two phases keep equilibrium and can exchange each other if the balancea

关键词： methane emission methane prediction initial rate longwall panel

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