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Journal articles on the topic 'Production de CH4'

Author: Grafiati

Published: 7 December 2024

Last updated: 31 July 2025

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1

Kumar, Pankaj, Dan Meyerstein, Amir Mizrahi, and Haya Kornweitz. "Investigation of the Adsorption and Reactions of Methyl Radicals on Transition Metal (M = Co, Ni, Pd, Pt) (111) Surfaces in Aqueous Suspensions." Molecules 30, no. 15 (2025): 3065. https://doi.org/10.3390/molecules30153065.

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The DFT method was used to evaluate the adsorption of methyl radicals and the evolution of ethane on the M(111) (M = Co, Ni, Pd, Pt) surfaces, eight metal atoms, in aqueous medium. A maximum of five and four radicals can be adsorbed on Co(111) and Ni(111), respectively, and six on Pd(111) and Pt(111) (top site). The ethane evolution occurs via the Langmuir–Hinshelwood (LH) or Eley–Rideal (ER) mechanisms. The production of ethane through the interaction of two adsorbed radicals is thermodynamically feasible for high coverage ratios on the four surfaces; however, kinetically, it is feasible at r

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Chen, Chung-Nan, Tzu-Tai Lee, and Bi Yu. "19. Improving the Prediction of Methane Production Determined by in Vitro Gas Production Technique for Ruminants." Annals of Animal Science 16, no. 2 (2016): 565–84. http://dx.doi.org/10.1515/aoas-2015-0078.

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Abstract Twelve feedstuffs (cereals, fibrous byproducts, protein-rich byproducts and forages) were determined for methane (CH4) production by the in vitro gas production technique (IVGPT) and were correlated with their chemical compositions to predict enteric CH4 originating from these feedstuffs in ruminants. Corn, soybean hull, soybean meal and corn silage generated the highest CH4 production from their respective categories. The average CH4 production of fibrous byproducts (44.6 ml/g DM incubated) was significantly higher than that of cereals (40.3 ml/g DM incubated), forages (33.3 ml/g DM

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Setyanto, P., Rosenani A.B., A. K. Makarim, Che Fauziah I., A. Bidin, and Suharsih Suharsih. "SOIL CONTROLLING FACTORS OF METHANE GAS PRODUCTION FROM FLOODED RICE FIELDS IN PATI DISTRICT, CENTRAL JAVA." Indonesian Journal of Agricultural Science 3, no. 1 (2016): 1. http://dx.doi.org/10.21082/ijas.v3n1.2002.1-11.

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Atmospheric methane (CH4) is recognized as one of the most important greenhouse gases. Methane, with some 15-30 times greater infrared-absorbing capability than CO2 on a mass basis, may account for 20% of anticipated global warming. Soils are one of the key factors, which play an important role in CH4 production and emission. However, data on CH4 emission from different soil types and the characteristics affecting CH4 production are lacking when compared to data on agronomic practices. This study was conducted to investigate the potential of CH4 production of selected soils in Java, and determ

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Setyanto, P., Rosenani A.B., A. K. Makarim, Che Fauziah I., A. Bidin, and Suharsih Suharsih. "SOIL CONTROLLING FACTORS OF METHANE GAS PRODUCTION FROM FLOODED RICE FIELDS IN PATI DISTRICT, CENTRAL JAVA." Indonesian Journal of Agricultural Science 3, no. 1 (2016): 1. http://dx.doi.org/10.21082/ijas.v3n1.2002.p1-11.

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Atmospheric methane (CH4) is recognized as one of the most important greenhouse gases. Methane, with some 15-30 times greater infrared-absorbing capability than CO2 on a mass basis, may account for 20% of anticipated global warming. Soils are one of the key factors, which play an important role in CH4 production and emission. However, data on CH4 emission from different soil types and the characteristics affecting CH4 production are lacking when compared to data on agronomic practices. This study was conducted to investigate the potential of CH4 production of selected soils in Java, and determ

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SAUVANT, D., S. GIGER-REVERDIN, A. SERMENT, and L. BROUDISCOU. "Influences des régimes et de leur fermentation dans le rumen sur la production de méthane par les ruminants." INRAE Productions Animales 24, no. 5 (2011): 433–46. http://dx.doi.org/10.20870/productions-animales.2011.24.5.3276.

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Ce travail s'appuie sur l'étude de plusieurs bases de données en vue d'extraire des modèles de prévision de la production de CH4 enfonction des régimes et des fermentations ruminales. La méthanogenèse est décrite en relation avec les principaux principes de la stoechiométrieet de la thermodynamique des fermentations ruminales. Il apparaît en particulier une relation étroite entre la productionde CH4 et le rapport des acides acétique/propionique du jus de rumen (Ac/Pr). Les variations du profil des AGV et de la productionde CH4 traduisent des phénomènes d'adaptation des microorganismes du rumen

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Tenorio, Sandy E., and Laura Farías. "Picoplanktonic methane production in eutrophic surface waters." Biogeosciences 21, no. 8 (2024): 2029–50. http://dx.doi.org/10.5194/bg-21-2029-2024.

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Abstract. Over the past decade, extensive research has delved into the methane (CH4) paradox, which involves aerobic CH4 production. We present noteworthy observations of CH4 oversaturation within the surface layer of the central Chile upwelling zone (36° S, 73° W) over two consecutive seasonal cycles (2018–2021). Complementing these observations, CH4 cycling experiments were conducted, utilizing distinct plankton fractions (encompassing the natural planktonic community, fractions < 150, < 3 and < 0.2 µm), in different productivity periods of phytoplanktonic production and composition

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Schroll, Moritz, Katharina Lenhart, Thomas Bender, et al. "Fungal Methane Production Controlled by Oxygen Levels and Temperature." Methane 3, no. 2 (2024): 257–75. http://dx.doi.org/10.3390/methane3020015.

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Saprotrophic fungi, key players in global carbon cycling, have been identified as methane (CH4) sources not yet accounted for in the global CH4 budget. This study, for the first time, explores the influence of oxygen (O2) and temperature on CH4 production by two fungi, Laetiporus sulphureus and Pleurotus sapidus. To explore the relationship between these parameters and fungal CH4 formation, we examined CH4 formation under varying O2 levels (0 to 98%) and temperatures (17, 27, and 40 °C) during fungal growth on pine wood, beech wood, and grass under sterile conditions. Our findings show that fu

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Zheng, Jianqiu, Taniya RoyChowdhury, Ziming Yang, Baohua Gu, Stan D. Wullschleger, and David E. Graham. "Impacts of temperature and soil characteristics on methane production and oxidation in Arctic tundra." Biogeosciences 15, no. 21 (2018): 6621–35. http://dx.doi.org/10.5194/bg-15-6621-2018.

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Abstract. Rapid warming of Arctic ecosystems accelerates microbial decomposition of soil organic matter and leads to increased production of carbon dioxide (CO2) and methane (CH4). CH4 oxidation potentially mitigates CH4 emissions from permafrost regions, but it is still highly uncertain whether soils in high-latitude ecosystems will function as a net source or sink for CH4 in response to rising temperature and associated hydrological changes. We investigated CH4 production and oxidation potential in permafrost-affected soils from degraded ice-wedge polygons on the Barrow Environmental Observa

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Heslop, J. K., K. M. Walter Anthony, A. Sepulveda-Jauregui, et al. "Thermokarst lake methanogenesis along a complete talik profile." Biogeosciences 12, no. 14 (2015): 4317–31. http://dx.doi.org/10.5194/bg-12-4317-2015.

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Abstract. Thermokarst (thaw) lakes emit methane (CH4) to the atmosphere formed from thawed permafrost organic matter (OM), but the relative magnitude of CH4 production in surface lake sediments vs. deeper thawed permafrost horizons is not well understood. We assessed anaerobic CH4 production potentials from various depths along a 590 cm long lake sediment core that captured the entire sediment package of the talik (thaw bulb) beneath the center of an interior Alaska thermokarst lake, Vault Lake, and the top 40 cm of thawing permafrost beneath the talik. We also studied the adjacent Vault Creek

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Heslop, J. K., K. M. Walter Anthony, A. Sepulveda-Jauregui, et al. "Thermokarst-lake methanogenesis along a complete talik profile." Biogeosciences Discussions 12, no. 6 (2015): 4865–905. http://dx.doi.org/10.5194/bgd-12-4865-2015.

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Abstract. Thermokarst (thaw) lakes emit methane (CH4) to the atmosphere formed from thawed permafrost organic matter (OM), but the relative magnitude of CH4 production in surface lake sediments vs. deeper thawed permafrost horizons is not well understood. We assessed anaerobic CH4 production potentials from various depths along a 590 cm long lake sediment core that captured the entire sediment package of the talik (thaw bulb) beneath the center of an interior Alaska thermokarst lake, Vault Lake, and the top 40 cm of thawing permafrost beneath the talik. We also studied the adjacent Vault Creek

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Yuan, Q., J. Pump, and R. Conrad. "Straw application in paddy soil enhances methane production also from other carbon sources." Biogeosciences 11, no. 2 (2014): 237–46. http://dx.doi.org/10.5194/bg-11-237-2014.

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Abstract. Flooded rice fields are an important source of the greenhouse gas methane. Methane is produced from rice straw (RS), soil organic matter (SOM), and rice root organic carbon (ROC). Addition of RS is widely used for ameliorating soil fertility. However, this practice provides additional substrate for CH4 production and results in increased CH4 emission. Here, we found that decomposing RS is not only a substrate of CH4 production, but in addition stimulates CH4 production from SOM and ROC. Apart from accelerating the creation of reduced conditions in the soil environment, RS decompositi

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Klintzsch, Thomas, Gerald Langer, Gernot Nehrke, Anna Wieland, Katharina Lenhart, and Frank Keppler. "Methane production by three widespread marine phytoplankton species: release rates, precursor compounds, and potential relevance for the environment." Biogeosciences 16, no. 20 (2019): 4129–44. http://dx.doi.org/10.5194/bg-16-4129-2019.

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Abstract. Methane (CH4) production within the oceanic mixed layer is a widespread phenomenon, but the underlying mechanisms are still under debate. Marine algae might contribute to the observed CH4 oversaturation in oxic waters, but so far direct evidence for CH4 production by marine algae has only been provided for the coccolithophore Emiliania huxleyi. In the present study we investigated, next to E. huxleyi, other widespread haptophytes, i.e., Phaeocystis globosa and Chrysochromulina sp. We performed CH4 production and stable carbon isotope measurements and provide unambiguous evidence that

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Jentsch, W., B. Piatkowski, M. Schweigel, and M. Derno. "Quantitative results for methane production of cattle in Germany." Archives Animal Breeding 52, no. 6 (2009): 587–92. http://dx.doi.org/10.5194/aab-52-587-2009.

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Abstract. An extensive number of investigations on the energetic utilization efficiency of nutrients and feedstuffs by cattle were carried out in the former Oskar-Kellner-Institute (now the »Oskar Kellner« Research Unit of Nutritional Physiology at the Research Institute for the Biology of Farm Animals (FBN), Dummerstorf). The amounts of methane (CH4) that they produced were compiled and stratified with regard to various performances, dietary nutrient composition and nutrition levels. With increasing food intake and performance, an increase of CH4 emission per animal was observed. However, wit

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Behrouzi, Amir, Hailey Bolen, Francisco José de Novais, John A. Basarab, Edward bork, and Carolyn J. Fitzsimmons. "PSVIII-19 Assessing methane and carbon dioxide production in beef cows across diverse foraging conditions." Journal of Animal Science 102, Supplement_3 (2024): 600–601. http://dx.doi.org/10.1093/jas/skae234.674.

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Abstract Beef cattle grazing across more than 40M ha of Canada’s grasslands is economically significant yet contributes to methane (CH4) emissions. Accurately measuring CH4 emissions across diverse environments presents substantial challenges. Our study investigated CH4 and carbon dioxide (CO2) production in 3-yr-old pregnant crossbred beef cows (n = 30) across different phases of the beef production cycle, including in drylot and while grazing on native rangeland, in Western Canada’s Aspen Parkland region using the GreenFeed Emissions Monitoring System (GEM). During the January to March drylo

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Xu, Jiaxing, Derrick Y. F. Lai, and Suvadip Neogi. "Effects of Land Use Types on CH4 and CO2 Production Potentials in Subtropical Wetland Soils." Water 12, no. 7 (2020): 1856. http://dx.doi.org/10.3390/w12071856.

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Changes in land use types can alter the soil and environmental characteristics of wetlands, which in turn influence the magnitude of greenhouse gas production by soil microbes. However, the effects of land use change on the production potential of methane (CH4) and carbon dioxide (CO2) in subtropical wetland soils and the underlying controls are still largely unknown. In this study, we examined the soil CH4 and CO2 production potentials under five different land use types (natural mangrove, Gei Wai water channel, Gei Wai forest, reedbed, and freshwater pond) and their relationships with soil p

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Flourie, B., P. Pellier, C. Florent, P. Marteau, P. Pochart, and J. C. Rambaud. "Site and substrates for methane production in human colon." American Journal of Physiology-Gastrointestinal and Liver Physiology 260, no. 5 (1991): G752—G757. http://dx.doi.org/10.1152/ajpgi.1991.260.5.g752.

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On two occasions separated by seven days, 22 g mucin (hog gastric mucin) was infused into right and left colon of 12 healthy volunteers (6 CH4 producers and 6 non-producers) maintained on a controlled diet. In the six CH4 producers, excess volumes of H2 excreted in breath were 73.4 +/- 11.9 and 35.1 +/- 14.1 (SE) ml/8 h (P less than 0.05) in response to right and left colonic infusion of mucin, respectively; excess volumes of CH4 were, respectively, 6.7 +/- 1.7 and 38.9 +/- 11.1 ml/8 h (P less than 0.05). In the six CH4 nonproducers, excess volumes of H2 excreted in breath were 76.6 +/- 17.6 a

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Yuan, Q., J. Pump, and R. Conrad. "Straw application in paddy soil enhances methane production also from other carbon sources." Biogeosciences Discussions 10, no. 8 (2013): 14169–93. http://dx.doi.org/10.5194/bgd-10-14169-2013.

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Abstract. Flooded rice fields are an important source of the greenhouse gas methane. Methane is produced from rice straw (RS), soil organic matter (SOM), and rice root organic carbon (ROC). Addition of RS is widely used for ameliorating soil fertility. However, this practice provides additional substrate for CH4 production and results in increased CH4 emission. Here, we found that decomposing RS is not only a substrate of CH4 production, but in addition stimulates CH4 production from SOM and ROC. Apart from accelerating the creation of reduced conditions in the soil environment, RS decompositi

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Galyean, Michael L., and Kristin E. Hales. "Relationships between Dietary Chemical Components and Enteric Methane Production and Application to Diet Formulation in Beef Cattle." Methane 3, no. 1 (2024): 1–11. http://dx.doi.org/10.3390/methane3010001.

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We used published data consisting of 263 treatment mean observations from beef cattle and dairy steers and heifers, in which CH4 was measured via chambers or head boxes, to evaluate relationships between enteric CH4 production and dry matter intake (DMI) and dietary components. Daily DMI was positively related (slope = 15.371, p < 0.001) to total daily production (g/d) of CH4 (r2 = 0.821). Among chemical components, dietary neutral detergent fiber (NDF) concentration was the most highly related (r2 = 0.696; slope = 0.2001; p < 0.001) to CH4 yield (g/kg of DMI), with strong relationships

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Vizza, Carmella, William E. West, Stuart E. Jones, Julia A. Hart, and Gary A. Lamberti. "Regulators of coastal wetland methane production and responses to simulated global change." Biogeosciences 14, no. 2 (2017): 431–46. http://dx.doi.org/10.5194/bg-14-431-2017.

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Abstract. Wetlands are the largest natural source of methane (CH4) emissions to the atmosphere, which vary along salinity and productivity gradients. Global change has the potential to reshape these gradients and therefore alter future contributions of wetlands to the global CH4 budget. Our study examined CH4 production along a natural salinity gradient in fully inundated coastal Alaska wetlands. In the laboratory, we incubated natural sediments to compare CH4 production rates between non-tidal freshwater and tidal brackish wetlands, and quantified the abundances of methanogens and sulfate-red

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Chang, Kuang-Yu, William J. Riley, Patrick M. Crill, Robert F. Grant, and Scott R. Saleska. "Hysteretic temperature sensitivity of wetland CH<sub>4</sub> fluxes explained by substrate availability and microbial activity." Biogeosciences 17, no. 22 (2020): 5849–60. http://dx.doi.org/10.5194/bg-17-5849-2020.

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Abstract. Methane (CH4) emissions from wetlands are likely increasing and important in global climate change assessments. However, contemporary terrestrial biogeochemical model predictions of CH4 emissions are very uncertain, at least in part due to prescribed temperature sensitivity of CH4 production and emission. While statistically consistent apparent CH4 emission temperature dependencies have been inferred from meta-analyses across microbial to ecosystem scales, year-round ecosystem-scale observations have contradicted that finding. Here, we show that apparent CH4 emission temperature depe

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Saenab, Andi, Komang G. Wiryawan, Y. Retnani, and Elizabeth Wina. "Synergistic Effect of Biofat and Biochar of Cashew Nutshell on Mitigate Methane in the Rumen." Jurnal Ilmu Ternak dan Veteriner 25, no. 3 (2020): 139. http://dx.doi.org/10.14334/jitv.v25i3.2475.

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The study aimed to evaluate the effectiveness of a combination of biofat with biochar or biosmoke (bioindustrial products of cashew nut shells) at the best level as feed additive in reducing methane production and improving in vitro rumen fermentation. This experiment had two series of combination and each used a randomized block design with 6 treatments and 4 replications. A series of biofat (BF) and biochar (BC) combination were added each to substrate as followed BFBC1 = 0: 100%; BFBC2 = 25:75%; BFBC3 = 50:50%; BFBC4 = 75:25%; BFBC5 = 100: 0%. While, a series of biofat (BF) and biosmoke (BS

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Qian, Shiqing, Luming Chen, Sunqiang Xu, et al. "Research on Methane-Rich Biogas Production Technology by Anaerobic Digestion Under Carbon Neutrality: A Review." Sustainability 17, no. 4 (2025): 1425. https://doi.org/10.3390/su17041425.

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Amid the pressing challenge of global climate change, biogas (marsh gas) has garnered recognition as a clean and renewable energy source with significant potential to reduce greenhouse gas emissions and support sustainable energy production. Composed primarily of methane (CH4) and carbon dioxide (CO2), enhancing the CH4 content in biogas is essential for improving its quality and expanding its high-value applications. This review examines the mechanisms underlying CH4 and CO2 production in anaerobic digestion (AD) processes; investigates the effects of raw material types, process routes, and f

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McCaughey, W. P., K. Wittenberg, and D. Corrigan. "Methane production by steers on pasture." Canadian Journal of Animal Science 77, no. 3 (1997): 519–24. http://dx.doi.org/10.4141/a96-137.

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In order to determine the quantity of methane (CH4) produced by steers on pasture, 16 steers with a mean weight of 356 ± 25 kg were randomly selected from a larger group of cattle (n = 48) to evaluate the effects of grazing management and monensin controlled release capsule (CRC) administration on ruminal CH4 production using the sulphur hexafluoride (SF6) tracer-gas technique. Pasture management treatments consisted of two grazing systems (continuous stocking or 10-paddock rotational stocking) at each of two stocking rates (low, 1.1 steer ha−1 or high, 2.2 steers ha−1) with two replications o

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Zhang, Huili, Yibing Kou, Jan Baeyens, Miao Yang, and Yimin Deng. "Methanol Production from Biogas-derived Syngas." E3S Web of Conferences 635 (2025): 02003. https://doi.org/10.1051/e3sconf/202563502003.

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"Green" hydrogen must gradually replace fossil fuel-based H2. The anaerobic digestion (AD) of sewage sludge or agro-industrial waste yields a CH4/CO2 biogas and a NH4+ digestate. Three ways to produce H2 can be applied: (1) the Dry Reforming of CH4, and CO2, DRM (from biogas); (2) the Catalytic CH4 Decomposition, CDM (from biogas after CO2 capture) and (3) the Catalytic Ammonia Decomposition (CDA, from digestate). DRM produces the ideal syngas at 700 °C and for a 50-50vol% CH4/CO2 biogas. CDM with a selected catalyst produced 95% H2. The ammonia-rich digestate was stripped and NH3 was catalyti

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Ellis, Jennifer L., Héctor Alaiz-Moretón, Alberto Navarro-Villa, et al. "Application of Meta-Analysis and Machine Learning Methods to the Prediction of Methane Production from In Vitro Mixed Ruminal Micro-Organism Fermentation." Animals 10, no. 4 (2020): 720. http://dx.doi.org/10.3390/ani10040720.

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In vitro gas production systems are utilized to screen feed ingredients for inclusion in ruminant diets. However, not all in vitro systems are set up to measure methane (CH4) production, nor do all publications report in vitro CH4. Therefore, the objective of this study was to develop models to predict in vitro CH4 production from total gas and volatile fatty acid (VFA) production data and to identify the major drivers of CH4 production in these systems. Meta-analysis and machine learning (ML) methodologies were applied to a database of 354 data points from 11 studies to predict CH4 production

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Bradford, M. A., P. Ineson, P. A. Wookey, and H. M. Lappin-Scott. "Role of CH4 oxidation, production and transport in forest soil CH4 flux." Soil Biology and Biochemistry 33, no. 12-13 (2001): 1625–31. http://dx.doi.org/10.1016/s0038-0717(01)00078-5.

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Zhang, G. B., Y. Ji, J. Ma, G. Liu, H. Xu, and K. Yagi. "Pathway of CH<sub>4</sub> production, fraction of CH<sub>4</sub> oxidized, and <sup>13</sup>C isotope fractionation in a straw incorporated rice field." Biogeosciences Discussions 9, no. 10 (2012): 14175–215. http://dx.doi.org/10.5194/bgd-9-14175-2012.

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Abstract. Straw incorporation generally increases CH4 emission from rice fields, but its effects on the mechanism of CH4 emission, especially on the pathway of CH4 production and the fraction of CH4 oxidized are not well known. To investigate the methanogenic pathway, the fraction of CH4 oxidized as well as the stable carbon isotope fractionation during the oxidation and transport of CH4 as affected by straw incorporation, production and oxidation of CH4 in paddy soil and rice roots and δ13C-values of produced CH4 and CO2, and emitted CH4 were observed in incubation and field experiments. Stra

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Susilawati, Helena Lina, Anicetus Wihardjaka, Nurhasan Nurhasan, and Prihasto Setyanto. "Potensi Bahan Alami dalam Menekan Produksi CH4 dan N2O dari Tanah Sawah." Jurnal Ilmu Pertanian Indonesia 26, no. 4 (2021): 499–510. http://dx.doi.org/10.18343/jipi.26.4.499.

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Low nitrogen efficiency is one of the sources of greenhouse gas (GHG) emissions from rice fields. Methane (CH4) and nitrous oxide (N2O) emissions could be controlled by nitrification inhibitors (NI). However, NI that has been commercialized is expensive. Therefore, some natural materials should be developed as NI that is low cost, easy to use, low N2O and CH4, and eco-friendly. The objective of this study was to observe the effect of natural NI on the production potential of CH4 and N2O from paddy soil. The experiment in the laboratory was arranged in a factorial design (2 × 7 × 3 replication)

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Xia, Zhizeng, Jian Hou, Xuewu Wang, Xiaodong Dai, and Mingtao Liu. "Cyclic methane hydrate production stimulated with CO2 and N2." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 76 (2021): 14. http://dx.doi.org/10.2516/ogst/2020097.

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The cyclic methane hydrate production method was proposed with CO2 and N2 mixture stimulation. The cyclic production model was established based on actual hydrate reservoir parameters, accordingly, the production characteristics were analyzed, and a sensitivity analysis was conducted. The results show the following: (1) The depressurization mechanism is dominant in the cyclic production. CH4 production and CH4 hydrate dissociation can be greatly enhanced because the cyclic process can effectively reduce the partial pressure of CH4 (gas phase). However, there is a limited effect for CO2 storage

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Long, Nathan S., Jarret A. Proctor, Jason K. Smith, et al. "99 Dietary Inclusion of a High-Anthocyanin Corn Cob Meal into Feedlot Rations Reducesin Vitro Methane Emissions." Journal of Animal Science 101, Supplement_1 (2023): 71–73. http://dx.doi.org/10.1093/jas/skad068.085.

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Abstract Methane (CH4) is a greenhouse gas associated with global warming that is released as a byproduct of rumen fermentation. Two experiments were conducted to determine if dietary inclusion of a novel high anthocyanin (Hi-A) containing corn cob meal [CCM; 4.99 mg anthocyanin×g-1 of dry matter (DM)] influences in vitro CH4 emissions relative to a conventional CCM (CNV; 0.04 mg anthocyanin×g-1 of DM). High-roughage starter (experiment 1) and low-roughage finisher (experiment 2) diets were formulated to contain 20% and0% total CCM (DM-basis), respectively. Treatments were based on the proport

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Zhang, G. B., Y. Ji, J. Ma, H. Xu, and Z. C. Cai. "Case study on effects of water management and rice straw incorporation in rice fields on production, oxidation, and emission of methane during fallow and following rice seasons." Soil Research 49, no. 3 (2011): 238. http://dx.doi.org/10.1071/sr10117.

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To investigate production, oxidation, and emission of methane (CH4) in rice fields during the fallow and following rice seasons as affected by water management and rice straw incorporation in the fallow season, field and incubation experiments were carried out from November 2007 to November 2008. Four treatments, i.e. two water managements (flooded and drained) and two rates of rice straw application (0 and 4.8 t/ha), were laid out in a randomised block design. Results show that obvious CH4 production occurred in flooded fields in the late fallow season; consequently, fallow CH4 emission contr

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Morana, Cédric, Steven Bouillon, Vimac Nolla-Ardèvol, et al. "Methane paradox in tropical lakes? Sedimentary fluxes rather than pelagic production in oxic conditions sustain methanotrophy and emissions to the atmosphere." Biogeosciences 17, no. 20 (2020): 5209–21. http://dx.doi.org/10.5194/bg-17-5209-2020.

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Abstract. Despite growing evidence that methane (CH4) formation could also occur in well-oxygenated surface fresh waters, its significance at the ecosystem scale is uncertain. Empirical models based on data gathered at high latitude predict that the contribution of oxic CH4 increases with lake size and should represent the majority of CH4 emissions in large lakes. However, such predictive models could not directly apply to tropical lakes, which differ from their temperate counterparts in some fundamental characteristics, such as year-round elevated water temperature. We conducted stable-isotop

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Liu, D. Y., W. X. Ding, Z. J. Jia, and Z. C. Cai. "Relation between methanogenic archaea and methane production potential in selected natural wetland ecosystems across China." Biogeosciences 8, no. 2 (2011): 329–38. http://dx.doi.org/10.5194/bg-8-329-2011.

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Abstract. Methane (CH4) emissions from natural wetland ecosystems exhibit large spatial variability at regional, national, and global levels related to temperature, water table, plant type and methanogenic archaea etc. To understand the underlying factors that induce spatial differences in CH4 emissions, and the relationship between the population of methanogenic archaea and CH4 production potential in natural wetlands around China, we measured the CH4 production potential and the abundance of methanogenic archaea in vertical soil profiles sampled from the Poyang wetland in the subtropical zon

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Goopy, J. P., D. L. Robinson, R. T. Woodgate, et al. "Estimates of repeatability and heritability of methane production in sheep using portable accumulation chambers." Animal Production Science 56, no. 1 (2016): 116. http://dx.doi.org/10.1071/an13370.

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This study was designed to screen a large number of sheep to identify individuals with high and low methane (CH4) production, and to estimate repeatability and heritability of CH4 emissions in sheep, utilising portable accumulation chambers (PAC) designed for in-field use. Mature ewes (n = 710) selected from a research flock with known sires had their CH4 production over 1 h measured in PAC [CH4 (g1h)]. Individuals with High (n = 103) or Low (n = 104) CH4 (g1h), adjusted for liveweight (LW), were selected and re-measured on three occasions 1–4 months later, at another site with more abundant a

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Korkiakoski, Mika, Tiia Määttä, Krista Peltoniemi, Timo Penttilä, and Annalea Lohila. "Excess soil moisture and fresh carbon input are prerequisites for methane production in podzolic soil." Biogeosciences 19, no. 7 (2022): 2025–41. http://dx.doi.org/10.5194/bg-19-2025-2022.

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Abstract. Boreal upland forests are generally considered methane (CH4) sinks due to the predominance of CH4 oxidizing bacteria over the methanogenic archaea. However, boreal upland forests can temporarily act as CH4 sources during wet seasons or years. From a landscape perspective and in annual terms, this source can be significant as weather conditions may cause flooding, which can last a considerable proportion of the active season and because often, the forest coverage within a typical boreal catchment is much higher than that of wetlands. Processes and conditions which change mineral soils

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Lima, Danilo Montalvão, Adibe Luiz Abdalla Filho, Paulo de Mello Tavares Lima, et al. "Morphological characteristics, nutritive quality, and methane production of tropical grasses in Brazil." Pesquisa Agropecuária Brasileira 53, no. 3 (2018): 323–31. http://dx.doi.org/10.1590/s0100-204x2018000300007.

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Abstract: The objective of this work was to evaluate three tropical forage species for their in vitro methane (CH4) production and organic matter degradability, in order to determine the relationships between forage grass nutritive quality and CH4 production. Guinea grass (Megathyrsus maximus), palisade grass (Urochloa brizantha), and signal grass (Urochloa decumbens) were evaluated. Palisade grass showed the highest organic matter, neutral detergent fiber, acid detergent fiber, lignin, and lower-crude protein content. Signal grass had the highest values for hemicellulose and neutral detergent

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Praetzel, Leandra Stephanie Emilia, Nora Plenter, Sabrina Schilling, Marcel Schmiedeskamp, Gabriele Broll, and Klaus-Holger Knorr. "Organic matter and sediment properties determine in-lake variability of sediment CO<sub>2</sub> and CH<sub>4</sub> production and emissions of a small and shallow lake." Biogeosciences 17, no. 20 (2020): 5057–78. http://dx.doi.org/10.5194/bg-17-5057-2020.

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Abstract. Inland waters, particularly small and shallow lakes, are significant sources of carbon dioxide (CO2) and methane (CH4) to the atmosphere. However, the spatial in-lake heterogeneity of CO2 and CH4 production processes and their drivers in the sediment remain poorly studied. We measured potential CO2 and CH4 production in slurry incubations from 12 sites within the small and shallow crater lake Windsborn in Germany, as well as fluxes at the water–atmosphere interface of intact sediment core incubations from four sites. Production rates were highly variable and ranged from 7.2 to 38.5 µ

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Scott, Brian, Andrew H. Baldwin, and Stephanie A. Yarwood. "Quantification of potential methane emissions associated with organic matter amendments following oxic-soil inundation." Biogeosciences 19, no. 4 (2022): 1151–64. http://dx.doi.org/10.5194/bg-19-1151-2022.

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Abstract. Methane (CH4) emissions are a potent contributor to global warming, and wetlands can be a significant CH4 source. In a microcosm study, we evaluated how the practice of amending soils with organic matter as part of wetland restoration projects may affect CH4 production potential. Organic amendments including hay, manure, biosolids, composted yard waste, and wood mulch were evaluated at three different levels. Using 1 L glass microcosms, we measured the production of biogenic gases over 60 d in two soils designated by texture: a sandy loam (SL) and a sandy clay loam (SCL). Fresh organ

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Deng, Jia, Qi Zhang, Jiujiu He, Guangjie Zhao, Fuquan Song, and Hongqing Song. "Effects of competitive adsorption on production capacity during CO₂ displacement of CH₄ in shale." Physics of Fluids 34, no. 11 (2022): 116104. http://dx.doi.org/10.1063/5.0122802.

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During CO2 displacement of CH4 in shale, competitive adsorption results in reduced pore space used for gas flow in shale, which is closely associated with the production capacity of shale-gas reservoirs. Thus, the present work investigates the effects of CO2–CH4 competitive adsorption on production capacity. Herein, a slit–pore model is developed in terms of gas storage (CO2 and CH4) and graphene pores using molecular dynamics and implemented via large-scale atomic/molecular massively parallel simulator. The effects of CO2 injection pressure, temperature, and velocity and of pore size on CO2–C

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Tatsumi, Kenichi. "Effect of Surface Methane Controls on Ozone Concentration and Rice Yield in Asia." Atmosphere 14, no. 10 (2023): 1558. http://dx.doi.org/10.3390/atmos14101558.

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Surface methane (CH4) is a significant precursor of tropospheric ozone (O3), a greenhouse gas that detrimentally impacts crops by suppressing their physiological processes, such as photosynthesis. This relationship implies that CH4 emissions can indirectly harm crops by increasing troposphere O3 concentrations. While this topic is important, few studies have specifically examined the combined effects of CH4 and CH4-induced O3 on rice yield and production. Utilizing the GEOS-Chem model, we assessed the potential reduction in rice yield and production in Asia against a 50% reduction in anthropog

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Liu, D., W. Ding, Z. Jia, and Z. Cai. "Influence of niche differentiation on the abundance of methanogenic archaea and methane production potential in natural wetland ecosystems across China." Biogeosciences Discussions 7, no. 5 (2010): 7629–55. http://dx.doi.org/10.5194/bgd-7-7629-2010.

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Abstract. Methane (CH4) emissions from natural wetland ecosystems exhibit large spatial variability. To understand the underlying factors that induce differences in CH4 emissions from natural wetlands around China, we measured the CH4 production potential and the abundance of methanogenic archaea in vertical profile soils sampled from the Poyang wetland in the subtropical zone, the Hongze wetland in the warm temperate zone, the Sanjiang marsh in the cold temperate zone, and the Ruoergai peatland in the Qinghai-Tibetan Plateau. The top soil layer had the highest population of methanogens (1.07−

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Sato, Yoshiaki, Kento Tominaga, Hirotatsu Aoki, et al. "Calcium salts of long-chain fatty acids from linseed oil decrease methane production by altering the rumen microbiome in vitro." PLOS ONE 15, no. 11 (2020): e0242158. http://dx.doi.org/10.1371/journal.pone.0242158.

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Calcium salts of long-chain fatty acids (CSFA) from linseed oil have the potential to reduce methane (CH4) production from ruminants; however, there is little information on the effect of supplementary CSFA on rumen microbiome as well as CH4 production. The aim of the present study was to evaluate the effects of supplementary CSFA on ruminal fermentation, digestibility, CH4 production, and rumen microbiome in vitro. We compared five treatments: three CSFA concentrations—0% (CON), 2.25% (FAL) and 4.50% (FAH) on a dry matter (DM) basis—15 mM of fumarate (FUM), and 20 mg/kg DM of monensin (MON).

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Kalamaras, Sotirios D., Georgios Vitoulis, Maria Lida Christou, et al. "The Effect of Ammonia Toxicity on Methane Production of a Full-Scale Biogas Plant—An Estimation Method." Energies 14, no. 16 (2021): 5031. http://dx.doi.org/10.3390/en14165031.

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Ammonia accumulation in biogas plants reactors is becoming more frequently encountered, resulting in reduced methane (CH4) production. Ammonia toxicity occurs when N-rich substrates represent a significant part of the biogas plant’s feedstock. The aim of this study was to develop an estimation method for the effect of ammonia toxicity on the CH4 production of biogas plants. Two periods where a biogas plant operated at 3200 mg·L−1 (1st period) and 4400 mg·L−1 (2nd period) of ammonium nitrogen (NH4+–N) were examined. Biomethane potentials (BMPs) of the individual substrates collected during thes

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Lee, Jaesung, Rajaraman Bharanidharan, Junseok Oh, et al. "PSXI-17 Comparison of enteric methane production between the respiration chamber and the CO2 method in Holstein heifers." Journal of Animal Science 102, Supplement_3 (2024): 760–61. http://dx.doi.org/10.1093/jas/skae234.858.

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Abstract The objective of this study was to validate the carbon dioxide (CO2) method (CO2T) in comparison with the respiration chamber (RC) method for the measurement of enteric methane (CH4) emission. The study was conducted over 108 d with Holstein heifers [n = 10; initial body weight (BW) = 178 kg; and age, 7.7 mo). The study consisted of 3 consecutive measurement periods and each period consisted of 21 d of feed adaptation followed by 15 d of CH4 measurement using the CO2T (3 d) and the RC method (12 d). The 55% timothy hay and 45% concentrate were fed twice daily at 1.2% to 1.5% of BW on

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Kilian, Levi R. "146 Effect of Sire on Methane Production." Journal of Animal Science 101, Supplement_3 (2023): 33. http://dx.doi.org/10.1093/jas/skad281.040.

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Abstract The objective of this study was to determine if sires have a significant effect on methane (CH4) production in a feedlot setting. To reduce the emission of greenhouse gases from cattle, evaluating variables that are easy to manage and change becomes important for a solution. If sires influence methane production, selection can be used to reduce methane production in cattle as sire differences are indicative of a genetic influence. The data used in this study were obtained from Colorado State University (CSU), with animals from John E. Rouse Beef Improvement Center. Animals with methan

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Zhang, G. B., Y. Ji, J. Ma, G. Liu, H. Xu, and K. Yagi. "Pathway of CH<sub>4</sub> production, fraction of CH<sub>4</sub> oxidized, and <sup>13</sup>C isotope fractionation in a straw-incorporated rice field." Biogeosciences 10, no. 5 (2013): 3375–89. http://dx.doi.org/10.5194/bg-10-3375-2013.

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Abstract. Straw incorporation generally increases CH4 emission from rice fields, but its effects on the mechanism of CH4 emission, especially on the pathway of CH4 production and the fraction of CH4 oxidized, are not well known. To investigate the methanogenic pathway, the fraction of CH4 oxidized as well as the stable carbon isotope fractionation during the oxidation and transport of CH4 as affected by straw incorporation, observations were conducted of production and oxidation of CH4 in paddy soil and rice roots and δ13C-values of produced CH4 and CO2, and emitted CH4 in incubation and field

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Guinguina, Abdulai, Maria Hayes, Fredrik Gröndahl, and Sophie Julie Krizsan. "Potential of the Red Macroalga Bonnemaisonia hamifera in Reducing Methane Emissions from Ruminants." Animals 13, no. 18 (2023): 2925. http://dx.doi.org/10.3390/ani13182925.

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Researchers have been exploring seaweeds to reduce methane (CH4) emissions from livestock. This study aimed to investigate the potential of a red macroalga, B. hamifera, as an alternative to mitigate CH4 emissions. B. hamifera, harvested from the west coast of Sweden, was used in an in vitro experiment using a fully automated gas production system. The experiment was a randomized complete block design consisting of a 48 h incubation that included a control (grass silage) and B. hamifera inclusions at 2.5%, 5.0%, and 7.5% of grass silage OM mixed with buffered rumen fluid. Predicted in vivo CH4

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Lachquer, Farah, and Jamil Toyir. "Mechanistic Study and Active Sites Investigation of Hydrogen Production from Methane and H2O Steady-State and Transient Reactivity with Ir/GDC Catalyst." Hydrogen 5, no. 4 (2024): 882–900. http://dx.doi.org/10.3390/hydrogen5040046.

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Catalytic activity, mechanisms, and active sites were determined for methane steam reforming (MSR) over gadolinium-doped ceria (GDC) supported iridium (0.1 wt%) prepared by impregnation of GDC with iridium acetylacetonate. Isothermal steady-state rate measurements followed by micro-gas chromatography analysis were performed at 660 and 760 °C over Ir/GDC samples pretreated in N2 or H2 at 900 °C. Transient responses to CH4 or H2O step changes in isothermal conditions were carried out at 750 °C over Ir/GDC pretreated in He or H2 using online quadrupole mass spectrometry. In the proposed mechanism

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Hou, Feng, Shuai Liu, Wan-Xin Yin, et al. "Methane Production Mechanism and Control Strategies for Sewers: A Critical Review." Water 16, no. 24 (2024): 3618. https://doi.org/10.3390/w16243618.

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Methane (CH4) emissions from urban sewer systems represent a significant contributor to greenhouse gases, driven by anaerobic decomposition processes. This review elucidates the mechanisms underlying CH4 production in sewers, which are influenced by environmental factors such as the COD/SO42− ratio, temperature, dissolved oxygen, pH, flow rate, and hydraulic retention time. We critically evaluated the effectiveness of empirical, mechanistic, and machine learning (ML) models in predicting CH4 emissions, highlighting the limitations of each. This review further examines control strategies, inclu

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Boontanon, N., S. Watanabe, T. Odate, and N. Yoshida. "Methane production, consumption and its carbon isotope ratios in the Southern Ocean during the austral summer." Biogeosciences Discussions 7, no. 5 (2010): 7207–25. http://dx.doi.org/10.5194/bgd-7-7207-2010.

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Abstract. The distribution of dissolved CH4 in the Southern Ocean at 140° E was measured during the austral summer. Surface CH4 was supersaturated on average, and the calculated mean sea-air flux rate was 0.32 μmol m−2 d−1. The vertical distributions exhibited a CH4 maximum at approximately 125 m (ΔCH4, 2.94 nM) below the chlorophyll-rich layer, suggesting a relationship between CH4 production and plankton dynamics in this area. CH4 oxidation and ocean movement characteristics in the deep layer led to the enrichment and fluctuation of δ13CCH4. We estimated the influence of Southern Ocean CH4,

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