Changes in methanogenic population size and CH4 production potential in response to crop phenology in tropical rice field

SUMARYThis paper describes the Malvi camel, a very distinctive breed from northern Madhya Pradesh (India), which is characterized by considerable milk production potential. Although the Malvi camel has long been recognized as a distinct population by local camel breeders, scientists were previously not aware of the existence of this breed. Information about the distribution area, estimated population size, and physical characteristics of the Malvi camel is provided and the prevailing management and production system is described. It is concluded that the Malvi camel represents a valuable genetic resource and that steps are necessary to ensure its survival as a separate gene-pool. The way in which this breed was discovered also demonstrates the need for utilizing local indigenous knowledge in the identification and documentation process of animal genetic resources.

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SOIL CONTROLLING FACTORS OF METHANE GAS PRODUCTION FROM FLOODED RICE FIELDS IN PATI DISTRICT, CENTRAL JAVA

Indonesian Journal of Agricultural Science ◽

10.21082/ijas.v3n1.2002.1-11 ◽

2016 ◽

Vol 3 (1) ◽

pp. 1

Author(s):

P. Setyanto ◽

Rosenani A.B. ◽

A.K. Makarim ◽

Che Fauziah I. ◽

A. Bidin ◽

...

Keyword(s):

Great Influence ◽

Gas Production ◽

Rice Fields ◽

Limiting Factors ◽

Stepwise Multiple Regression ◽

Ch4 Emission ◽

Atmospheric Methane ◽

Production Potential ◽

Central Java ◽

Ch4 Production

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 determine the limiting factors of CH4 production. The results showed that addition of 1% glucose to the soils led to an increase in CH4 production by more than twelve fold compared to no glucose addition. The CH4 production potential ranged between 3.21 and 112.30 mg CH4 kg-1 soil. The lowest CH4 production potential occurred in brown-grayish Grumosol, while the highest was in dark-gray Grumosol. Chemical and physical properties of the soils have great influence on CH4 production. Stepwise multiple regression analysis of CH4 production and soil characteristics showed that pH and the contents of Fe2O3, MnO2, SO4, and silt in the soil strongly influenced CH4 production. Results of this study can be used for further development of a model on CH4 emission from rice fields.

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SOIL CONTROLLING FACTORS OF METHANE GAS PRODUCTION FROM FLOODED RICE FIELDS IN PATI DISTRICT, CENTRAL JAVA

Indonesian Journal of Agricultural Science ◽

10.21082/ijas.v3n1.2002.p1-11 ◽

2016 ◽

Vol 3 (1) ◽

pp. 1 ◽

Cited By ~ 3

Author(s):

P. Setyanto ◽

Rosenani A.B. ◽

A.K. Makarim ◽

Che Fauziah I. ◽

A. Bidin ◽

...

Keyword(s):

Great Influence ◽

Gas Production ◽

Rice Fields ◽

Limiting Factors ◽

Stepwise Multiple Regression ◽

Ch4 Emission ◽

Atmospheric Methane ◽

Production Potential ◽

Central Java ◽

Ch4 Production

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 determine the limiting factors of CH4 production. The results showed that addition of 1% glucose to the soils led to an increase in CH4 production by more than twelve fold compared to no glucose addition. The CH4 production potential ranged between 3.21 and 112.30 mg CH4 kg-1 soil. The lowest CH4 production potential occurred in brown-grayish Grumosol, while the highest was in dark-gray Grumosol. Chemical and physical properties of the soils have great influence on CH4 production. Stepwise multiple regression analysis of CH4 production and soil characteristics showed that pH and the contents of Fe2O3, MnO2, SO4, and silt in the soil strongly influenced CH4 production. Results of this study can be used for further development of a model on CH4 emission from rice fields.

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Wildfire overrides hydrological controls on boreal peatland methane emissions

Biogeosciences ◽

10.5194/bg-16-2651-2019 ◽

2019 ◽

Vol 16 (13) ◽

pp. 2651-2660 ◽

Cited By ~ 2

Author(s):

Scott J. Davidson ◽

Christine Van Beest ◽

Richard Petrone ◽

Maria Strack

Keyword(s):

Water Table ◽

Environmental Variables ◽

Burn Severity ◽

Radiative Effect ◽

Production Potential ◽

Fort Mcmurray ◽

Ch4 Emissions ◽

Boreal Peatlands ◽

Ch4 Production ◽

The Impact

Abstract. Boreal peatlands represent a globally important store of carbon, and disturbances such as wildfire can have a negative feedback to the climate. Understanding how carbon exchange and greenhouse gas (GHG) dynamics are impacted after a wildfire is important, especially as boreal peatlands may be vulnerable to changes in wildfire regime under a rapidly changing climate. However, given this vulnerability, there is very little in the literature on the impact such fires have on methane (CH4) emissions. This study investigated the effect of wildfire on CH4 emissions at a boreal fen near Fort McMurray, Alberta, Canada, that was partially burned by the Horse River Wildfire in 2016. We measured CH4 emissions and environmental variables (2017–2018) and CH4 production potential (2018) in two different microform types (hummocks and hollows) across a peat burn severity gradient (unburned (UB), moderately burned (MB), and severely burned (SB)). Results indicated a switch in the typical understanding of boreal peatland CH4 emissions. For example, emissions were significantly lower in the MB and SB hollows in both years compared to UB hollows. Interestingly, across the burned sites, hummocks had higher fluxes in 2017 than hollows at the MB and SB sites. We found typically higher emissions at the UB site where the water table was close to the surface. However, at the burned sites, no relationship was found between CH4 emissions and water table, even under similar hydrological conditions. There was also significantly higher CH4 production potential from the UB site than the burned sites. The reduction in CH4 emissions and production in the hollows at burned sites highlights the sensitivity of hollows to fire, removing labile organic material for potential methanogenesis. The previously demonstrated resistance of hummocks to fire also results in limited impact on CH4 emissions and likely faster recovery to pre-fire rates. Given the potential initial net cooling effect resulting from a reduction in CH4 emissions, it is important that the radiative effect of all GHGs following wildfire across peatlands is taken into account.

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Methane production potential of soil profile in organic paddy field

Soil and Water Research ◽

10.17221/58/2016-swr ◽

2017 ◽

Vol 12 (No. 4) ◽

pp. 212-219 ◽

Cited By ~ 1

Author(s):

M. Mujiyo ◽

B.H. Sunarminto ◽

E. Hanudin ◽

J. Widada ◽

J. Syamsiyah

Keyword(s):

Soil Properties ◽

Soil Profile ◽

Rice Field ◽

Farming Systems ◽

Rice Fields ◽

Maximum Point ◽

Production Potential ◽

Organic C ◽

Mitigation Options ◽

Organic Rice

The use of organic fertilizers in the organic paddy/rice field can increase methane (CH4) production, which leads to environmental problems. In this study, we aimed to determine the CH4 production potential (CH4-PP) by a soil profile from samples using flood incubation. Soil properties (chemical, physical, and biological) were analyzed from soil samples of three different paddy farming systems (organic, semi-organic, and conventional), whilst soil from teak forest was used as the control. A significant relationship was determined between soil properties and CH4-PP. The average amount of CH4-PP in the organic rice field profile was the highest among all the samples (1.36 µg CH4/kg soil/day). However, the CH4 oxidation potential (CH4-OP) is high as well, as this was a chance of mitigation options should focus on increasing the methanotrophic activity which might reduce CH4 emissions to the atmosphere. The factor most influencing CH4-PP is soil C-organic (Corg). Corg and CH4-PP of the top soil of organic rice fields were 2.09% and 1.81 µg CH4/kg soil/day, respectively. As a consequence, here the mitigation options require more efforts than in the other farming systems. Soil with various amounts of Corg reached a maximum point of CH4-PP at various time after incubation (20, 15, and 10 days for the highest, medium, and the lowest amounts of Corg, respectively). A high amount of Corg provided enough C substrate for producing a higher amount of CH4 and reaching its longer peak production than the low amount of Corg. These findings also provide guidance that mitigation option reduces CH4 emissions from organic rice fields and leads to drainage every10–20 days before reaching the maximum CH4-PP.

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Relation between methanogenic archaea and methane production potential in selected natural wetland ecosystems across China

Biogeosciences ◽

10.5194/bg-8-329-2011 ◽

2011 ◽

Vol 8 (2) ◽

pp. 329-338 ◽

Cited By ~ 59

Author(s):

D. Y. Liu ◽

W. X. Ding ◽

Z. J. Jia ◽

Z. C. Cai

Keyword(s):

Tibetan Plateau ◽

Organic Carbon ◽

Soil Layer ◽

Methanogenic Archaea ◽

Natural Wetland ◽

Production Potential ◽

Wetland Ecosystems ◽

Ch4 Production ◽

Top Soil ◽

Methanogen Population

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 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 in the alpine climate zone. The top soil layer had the highest population of methanogens (1.07–8.29 × 109 cells g−1 soil) in all wetlands except the Ruoergai peatland and exhibited the maximum CH4 production potential measured at the mean in situ summer temperature. There is a significant logarithmic correlation between the abundance of methanogenic archaea and the soil organic carbon (R2 = 0.72, P < 0.001, n = 13) and between the abundance of methanogenic archaea and the total nitrogen concentrations (R2 = 0.76, P < 0.001, n = 13) in wetland soils. This indicates that the amount of soil organic carbon may affect the population of methanogens in wetland ecosystems. While the CH4 production potential is not significantly related to methanogen population (R2 = 0.01, P > 0.05, n = 13), it is related to the dissolved organic carbon concentration (R2 = 0.31, P = 0.05, n = 13). This suggests that the methanogen population might be not an effective index for predicting the CH4 production in wetland ecosystems. The CH4 production rate of the top soil layer increases with increasing latitude, from 273.64 μg CH4 kg−1 soil d−1 in the Poyang wetland to 664.59 μg CH4 kg−1 soil d−1 in the Carex lasiocarpa marsh of the Sanjiang Plain. We conclude that CH4 production potential in the freshwater wetlands of Eastern China is mainly affected by the supply of methanogenic substrates rather than temperature; in contrast, low summer temperatures at high elevations in the Ruoergai peatland of the Qinghai–Tibetan Plateau result in the presence of dominant species of methanogens with low CH4 production potential, which in turn suppresses CH4 production.

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Methanogenic Community, CH4 Production Potential and Its Determinants in the Active Layer and Permafrost Deposits on the Tibetan Plateau

Environmental Science & Technology ◽

10.1021/acs.est.0c07267 ◽

2021 ◽

Author(s):

Yutong Song ◽

Leiyi Chen ◽

Luyao Kang ◽

Guibiao Yang ◽

Shuqi Qin ◽

...

Keyword(s):

Tibetan Plateau ◽

Active Layer ◽

The Tibetan Plateau ◽

Production Potential ◽

Methanogenic Community ◽

Ch4 Production

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Influence of niche differentiation on the abundance of methanogenic archaea and methane production potential in natural wetland ecosystems across China

Biogeosciences Discussions ◽

10.5194/bgd-7-7629-2010 ◽

2010 ◽

Vol 7 (5) ◽

pp. 7629-7655 ◽

Cited By ~ 6

Author(s):

D. Liu ◽

W. Ding ◽

Z. Jia ◽

Z. Cai

Keyword(s):

Tibetan Plateau ◽

Organic Carbon ◽

Soil Layer ◽

Methanogenic Archaea ◽

Natural Wetland ◽

Production Potential ◽

Wetland Ecosystems ◽

Ch4 Production ◽

Top Soil ◽

Methanogen Population

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 (1.07−8.29×109 cells g−1 soil) in all wetlands except the Ruoergai peatland and exhibited the maximum CH4 production potential measured at the mean in situ summer temperature. There is a significant logarithmic correlation between the abundance of methanogenic archaea and the soil organic carbon (R2=0.718, P<0.001, n=13) and between the abundance of methanogenic archaea and the total nitrogen concentrations (R2=0.758, P<0.001, n=13) in wetland soils. This indicates that the amount of soil organic carbon may affect the population of methanogens in wetland ecosystems. While the CH4 production potential is not significantly related to methanogen population (R2=0.011, P>0.05, n=13), it is related to the dissolved organic carbon concentration (R2=0.305, P=0.05, n=13). This suggests that the methanogen population is not an effective index for predicting the CH4 production in wetland ecosystems. The CH4 production rate of the top soil layer increases with increasing latitude, from 274 μg CH4 kg−1 soil d−1 in the Poyang wetland to 665 μg CH4 kg−1 soil d−1 in the Carex lasiocarpa marsh of the Sanjiang Plain. The CH4 production potential in the freshwater wetlands of Eastern China is affected by the supply of methanogenic substrates rather than by temperature, whereas the supply of substrates was mainly affected by the position and stability of the wetland water table. In contrast, low summer temperatures at high elevations in the Ruoergai peatland of the Qinghai-Tibetan Plateau result in the presence of dominant species of methanogens with low CH4 production potential rather than the reduction of the supply of methanogenic substrates, which in turn suppresses CH4 production.

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