Methane flux from irrigated paddy and dryland rice fields, and from seasonally dry tropical forest and Savanna soils of India

Singh, Jaya; Raghubanshi, A. S.; Reddy, V. S.; Singh, Surendra; Kashyap, A. K.

doi:10.1016/s0038-0717(97)00112-0

Cited by 48 publications

(30 citation statements)

References 24 publications

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“…The measured methane uptake rates of the Thailand soils (up to Ϫ5.6 mg CH 4 m Ϫ2 day Ϫ1 at site AC) were similar to rates published previously in several other studies of upland soils (up to Ϫ7 mg CH 4 m Ϫ2 day Ϫ1 ) but were not as high as the highest rates reported for some tropical forest soils (up to Ϫ14 mg CH 4 m Ϫ2 day Ϫ1 ) (27,28). Both forested sites (sites SK and AC) showed net methane uptake, but only weak methane uptake or even net methane emission was observed at site CF.…”

Section: Discussionsupporting

confidence: 88%

“…With the exception of a Brazilian rainforest soil (16), all data on methanotrophic community structure are data for upland soils of the temperate zone of the Northern Hemisphere. Because some tropical sites have much higher rates of methane oxidation than temperate sites (27,28,29), it is of interest to investigate the MB community composition in these areas.…”

Section: Discussionmentioning

confidence: 99%

“…Atmospheric methane oxidation has been detected in many different upland soils, including arctic and subarctic tundra soils, grasslands and arable soils of the temperate zone, tropical forest soils, savannah soils, and even arid desert soils (25,31). Most studies have been performed to estimate the methane uptake capacity of upland soils of the temperate zone, and few data are available for tropical and subtropical soils (10,21,22,27,28). Most of these data indicate that the methane uptake rates of tropical and subtropical forest soils are comparable to those of forest soils of the temperate zone, but higher oxidation rates have been reported for some tropical soils (29).…”

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confidence: 99%

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Diversity of Methanotrophic Bacteria in Tropical Upland Soils under Different Land Uses

Knief

Vanitchung

Harvey

et al. 2005

Appl Environ Microbiol

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Three upland soils from Thailand, a natural forest, a 16-year-old reforested site, and an agricultural field, were studied with regard to methane uptake and the community composition of methanotrophic bacteria (MB). The methane uptake rates were similar to rates described previously for forest and farmland soils of the temperate zone. The rates were lower at the agricultural site than at the native forest and reforested sites. The sites also differed in the MB community composition, which was characterized by denaturing gradient gel electrophoresis (DGGE) of pmoA gene fragments (coding for a subunit of particulate methane monooxygenase) that were PCR amplified from total soil DNA extracts. Cluster analysis based on the DGGE banding patterns indicated that the MB communities at the forested and reforested sites were similar to each other but different from that at the farmland site. Sequence analysis of excised DGGE bands indicated that Methylobacter spp. and Methylocystis spp. were present. Sequences of the "forest soil cluster" or "upland soil cluster ␣," which is postulated to represent organisms involved in atmospheric methane consumption in diverse soils, were detected only in samples from the native forest and reforested sites. Additional sequences that may represent uncultivated groups of MB in the Gammaproteobacteria were also detected.The current atmospheric mixing ratio of the greenhouse gas methane (CH 4 ) is 1.75 ppm by volume (8). An estimated 30 Tg of CH 4 year Ϫ1 is consumed via microbiological oxidation in upland soils, accounting for about 6% of the global methane sink (17). Atmospheric methane oxidation has been detected in many different upland soils, including arctic and subarctic tundra soils, grasslands and arable soils of the temperate zone, tropical forest soils, savannah soils, and even arid desert soils (25,31). Most studies have been performed to estimate the methane uptake capacity of upland soils of the temperate zone, and few data are available for tropical and subtropical soils (10,21,22,27,28). Most of these data indicate that the methane uptake rates of tropical and subtropical forest soils are comparable to those of forest soils of the temperate zone, but higher oxidation rates have been reported for some tropical soils (29).Among upland soils, forest soils are much more efficient methane sinks than cultivated soils (1, 3). Changes in land use, especially cultivation of formerly undisturbed soils, reduce the sink strength for atmospheric methane by 60 to 90% (30, 31). Such reductions have been reported for tropical soils as well (10, 21). However, the methane oxidation rate seems to recover much faster after abandonment of agricultural activities (22) compared to systems in the temperate zone.Methane oxidation in upland soils is mediated by methanotrophic bacteria (MB). Seven recognized genera of MB belong to the group containing the type I methanotrophs (Gammaproteobacteria), while the group containing the type II methanotrophs consists of four genera of MB (Alphaproteobacteria)...

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Diversity of Methanotrophic Bacteria in Tropical Upland Soils under Different Land Uses

Knief

Vanitchung

Harvey

et al. 2005

Appl Environ Microbiol

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“…The concentration of greenhouse gas emissions was analyzed for flux using the following equation (Singh et al, 1998). …”

Section: Air Analysismentioning

confidence: 99%

Effect of Organic Fertilizer on CO2, CH4 and N2O Emissions in a Paddy Field

Sampanpanish

2012

MAS

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A study on the effect of organic fertilizer (cow manure) on carbon dioxide (CO 2 ), methane (CH 4 ) and nitrous oxide (N 2 O) emissions in a paddy field was conducted. Suphanburi 1 rice varieties were planted in a double-crop organic rice field at Pathum Thani Rice Research Center, Pathum Thani Province, Thailand. The study was categorized into 4 sets of experiments as follows: 1) control, without added fertilizer, 2) addition of organic fertilizer (cow manure) at 3.13 t·ha -1 , 3) addition of organic fertilizer at 9.38 t·ha -1 and 4) addition of organic fertilizer at 12.50 t·ha -1 . The study showed that the set with the addition of organic fertilizer at 12.50 t·ha -1 had the highest emissions rate of methane at an average rate of 4.94 mg·m -2 d. Lower methane emissions were found in the sets with added organic fertilizer at 9.38 t·ha -1 and in the control set without added fertilizer and the set with added organic fertilizer at 3.13 t·ha -1 , with an average emission rate of 3.08, 1.77 and 1.49 mg·m -2 ·d, respectively. The differences in the methane emissions of all of the sets are statistically significant, (P<0.05). Compared to the other sets, the carbon dioxide emissions were highest in the set with added organic fertilizer at 9.38 t·ha -1 , at an average rate of 380.55 mg·m -2 ·d. The rates were lower in the set with added organic fertilizer at 3.13 t·ha -1 , the control set without added fertilizer, and the set with the addition of organic fertilizer at 12.50 t·ha -1 , with emission rates of 325.24, 253.92 and 198.16 mg·m -2 d, respectively. However, these results had no significant difference. Meanwhile, the nitrous oxide emissions during the growing season of the rice were the highest in the set with the addition of organic fertilizer at 9.38 t·ha -1 , which had an average rate of 1.41 mg·m -2 ·d. The rate was lower in the control set without added fertilizer, the set with added organic fertilizer at 3.13 t·ha -1 , and the set with added organic fertilizer at 12.50 t·ha -1 with average emissions rates of 1.10, 1.40 and 0.60 mg·m -2 ·d, respectively.

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“…Furthermore, high-and lowaffinity kinetics for methane oxidation were measured in Italian paddy soils (4). Rain-fed rice fields have even been shown to act as a net sink for atmospheric methane when not flooded (26). Thus, in seasonally flooded paddy fields, type II methanotrophs harboring a second pMMO isoenzyme with a high affinity to methane (1) might be responsible for this process.…”

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confidence: 99%

Potential of pmoA Amplicon Pyrosequencing for Methanotroph Diversity Studies

Lüke

Frenzel

2011

Appl Environ Microbiol

132

111

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We analyzed the potential of pmoA amplicon pyrosequencing compared to that of Sanger sequencing with paddy soils as a model environment. We defined operational taxonomic unit (OTU) cutoff values of 7% and 18%, reflecting methanotrophic species and major phylogenetic pmoA lineages, respectively. Major lineages were already well covered by clone libraries; nevertheless, pyrosequencing provided a higher level of diversity at the species level.

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Methane flux from irrigated paddy and dryland rice fields, and from seasonally dry tropical forest and Savanna soils of India

Cited by 48 publications

References 24 publications

Diversity of Methanotrophic Bacteria in Tropical Upland Soils under Different Land Uses

Diversity of Methanotrophic Bacteria in Tropical Upland Soils under Different Land Uses

Effect of Organic Fertilizer on CO2, CH4 and N2O Emissions in a Paddy Field

Potential of pmoA Amplicon Pyrosequencing for Methanotroph Diversity Studies

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