Methane emission from paddy fields in Taiwan

2001 ◽  
Vol 33 (2) ◽  
pp. 157-165 ◽  
Author(s):  
S.-S. Yang ◽  
H.-L. Chang
Keyword(s):  
Methane Emission ◽  
Paddy Fields

scholarly journals Isolation of Key Methanogens for Global Methane Emission from Rice Paddy Fields: a Novel Isolate Affiliated with the Clone Cluster Rice Cluster I

2007 ◽  
Vol 73 (13) ◽  
pp. 4326-4331 ◽  
Author(s):  
Sanae Sakai ◽  
Hiroyuki Imachi ◽  
Yuji Sekiguchi ◽  
Akiyoshi Ohashi ◽  
Hideki Harada ◽  
...  
Keyword(s):  
Methane Emission ◽  
Methane Production ◽  
Rice Paddy ◽  
Defined Medium ◽  
Paddy Fields ◽  
Low Concentrations ◽  
In Situ Conditions ◽  
Culture Independent ◽  
Rice Paddy Fields

ABSTRACT Despite the fact that rice paddy fields (RPFs) are contributing 10 to 25% of global methane emissions, the organisms responsible for methane production in RPFs have remained uncultivated and thus uncharacterized. Here we report the isolation of a methanogen (strain SANAE) belonging to an abundant and ubiquitous group of methanogens called rice cluster I (RC-I) previously identified as an ecologically important microbial component via culture-independent analyses. To enrich the RC-I methanogens from rice paddy samples, we attempted to mimic the in situ conditions of RC-I on the basis of the idea that methanogens in such ecosystems should thrive by receiving low concentrations of substrate (H2) continuously provided by heterotrophic H2-producing bacteria. For this purpose, we developed a coculture method using an indirect substrate (propionate) in defined medium and a propionate-oxidizing, H2-producing syntroph, Syntrophobacter fumaroxidans, as the H2 supplier. By doing so, we significantly enriched the RC-I methanogens and eventually obtained a methanogen within the RC-I group in pure culture. This is the first report on the isolation of a methanogen within RC-I.

scholarly journals METHANE EMISSION FROM PADDY SOIL IN RELATION TO SOIL TEMPERATURE IN TROPICAL REGION

2016 ◽  
Vol 78 (1-2) ◽  
Author(s):  
Fazli P. ◽  
Hasfalina C. M. ◽  
Mohamed Azwan M. Z. ◽  
Umi Kalsom M. S. ◽  
Nor Aini A. R. ◽  
...  
Keyword(s):  
Soil Temperature ◽  
Methane Emission ◽  
Paddy Soil ◽  
Emission Rate ◽  
Paddy Fields ◽  
Tropical Region ◽  
Emission Pattern ◽  
Short Period ◽  
Methane Emission Rate

Methane (CH4) is 21 times more powerful as a greenhouse gas than carbon dioxide. Wetlands including flooded paddy fields are one of the major sources for this gas. Paddy fields are responsible for producing 25 to 54 Tg of CH4 annually. Methane emission rate could be affected by several factors such as irrigation pattern, fertilizer type, soil organic matter and soil temperature. Among them, soil temperature is a determining factor which deserves to be investigated. This study performed with the aim of understanding the effect of soil temperature on the methane emission rate from paddy soil in a short period of time (hourly) and long term (during rice growing season). The results of this study suggest that soil temperature could control the amount of methane emission and there is a positive and strong correlation in both soil temperature and methane emission pattern in short period of time. However, in case of long term trend, other factors such as water management and plant age decreased this correlation from 0.768 to 0.528.

Estimation of methane emission in organic paddy fields using remote sensing indexes

2018 ◽  
Vol 44 ◽  
pp. S59
Author(s):  
S. Kingpaiboon ◽  
S. Khantotong ◽  
P. Mungkarndee
Keyword(s):  
Remote Sensing ◽  
Methane Emission ◽  
Paddy Fields

Effect of soil temperature on methane emission from paddy fields

Chemosphere ◽  
1993 ◽  
Vol 26 (1-4) ◽  
pp. 247-250 ◽  
Author(s):  
D.C. Parashar ◽  
Prabhat K. Gupta ◽  
J. Rai ◽  
R.C. Sharma ◽  
N. Singh
Keyword(s):  
Soil Temperature ◽  
Methane Emission ◽  
Paddy Fields

scholarly journals Methane Emission from Paddy Fields and its Mitigation Options on a Field Scale

2006 ◽  
Vol 21 (3) ◽  
pp. 135-147 ◽  
Author(s):  
Kazunori Minamikawa ◽  
Naoki Sakai ◽  
Kazuyuki Yagi
Keyword(s):  
Methane Emission ◽  
Paddy Fields ◽  
Field Scale ◽  
Mitigation Options

scholarly journals Rice plants reduce methane emissions in high-emitting paddies

F1000Research ◽  
2019 ◽  
Vol 7 ◽  
pp. 1349 ◽  
Author(s):  
Masato Oda ◽  
Nguyen Huu Chiem
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Methane Emission ◽  
Rice Variety ◽  
Mekong Delta ◽  
Rice Paddy ◽  
Methane Emissions ◽  
Paddy Fields ◽  
Rice Plants ◽  
Oxygen Pathways

Background: Rice is understood to enhance methane emissions from paddy fields in IPCC guidelines. However, rice actually has two opposite functions related to methane: i) emission enhancement, such as by providing emission pathways (aerenchyma) and methanogenetic substrates; and ii) emission suppression by providing oxygen pathways, which suppress methanogenesis or enhance methane oxidation. The overall role of rice is thus determined by the balance between its enhancing and suppressing functions. Although previous studies have suggested that rice enhances total methane emissions, we aimed to demonstrate in high-emitting paddy fields that the overall methane emission is decreased by rice plants. Methods: We compared methane emissions with and without rice plants in triple cropping rice paddy fields in the Mekong Delta, Vietnam. The gas samples are collected using chamber method and ware analyzed by gas chromatography. Results: We found that rice, in fact, suppressed overall methane emissions in high-emitting paddies. The emission reductions increased with the growth of rice to the maximum tillering stage, then decreased after the heading stage, and finally recovered.  Discussion:  Our result indicates that the overall methane emission is larger than that of rice planted area. In addition, although many studies in standard-emitting paddies have found that the contribution of soil organic matter to methanogenesis is small, prior studies in high-emitting paddies suggest that methanogenesis depended mainly on soil organic matter accumulated from past crops. The higher the methane emission level, the lower the contribution of the rice-derived substrate; conversely, the higher the contribution of the rice providing oxygen. Finally, rice plants reduce methane emissions in high-emitting paddies. Conclusion: The present study demonstrates that during the growing season, rice is suppressing methane emissions in high-emitting paddies. This means the significance of using the rice variety which has high suppressing performance in high-emitting paddies.

Impact of gas transport through rice cultivars on methane emission from rice paddy fields

1997 ◽  
Vol 20 (9) ◽  
pp. 1175-1183 ◽  
Author(s):  
K. BUTTERBACH-BAHL ◽  
H. PAPEN ◽  
H. RENNENBERG
Keyword(s):  
Methane Emission ◽  
Gas Transport ◽  
Rice Paddy ◽  
Paddy Fields ◽  
Rice Cultivars ◽  
Rice Paddy Fields
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