Source:http://linkedlifedata.com/resource/pubmed/id/18574963
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
2
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pubmed:dateCreated |
2008-6-25
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pubmed:abstractText |
CH4 and N2O fluxes from soil under a tropical seasonal rain forest in Xishuangbanna, Southwest China were measured for one year using closed static chamber technique and gas chromatography method. Three treatments were set in the studied field: (A) litter-free, (B) with litter, and (C) with litter and seedling. The results showed that the soil in our study was a sink of atmospheric CH4 and source of atmospheric N2O. The observed mean CH4 fluxes from treatments A, B, and C were -50.0 +/- 4.0, -35.9 +/- 2.8, -31.6 +/- 2.8 microgC/(m2 x h), respectively, and calculated annual fluxes in 2003 were -4.1, -3.1, and -2.9 kgC/hm2, respectively. The observed mean N2O fluxes from treatments A, B, and C were 30.9 +/- 3.1, 28.2 +/- 3.5, 50.2+/-3.7 microgN/(m2 x h), respectively, and calculated annual fluxes in 2003 were 2.8, 2.6, and 3.7 kgN/hm2, respectively. Seasonal variations in CH4 and N2O fluxes were significant among all the three treatments. The presence of litter decreased CH4 uptake during wet season (P < 0.05), but not during dry season. There was a similar increase in seedlings-mediated N2O emissions during wet and dry seasons, indicating that seedlings increased N2O emission in both seasons. A strong positive relationship existed between CH4 fluxes and soil moisture for all the three treatments, and weak relationship between CH4 fluxes and soil temperature for treatment B and treatment C. The N2O fluxes correlated with soil temperature for all the three treatments.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Air Pollutants,
http://linkedlifedata.com/resource/pubmed/chemical/Methane,
http://linkedlifedata.com/resource/pubmed/chemical/Nitrous Oxide,
http://linkedlifedata.com/resource/pubmed/chemical/Soil Pollutants,
http://linkedlifedata.com/resource/pubmed/chemical/Water
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pubmed:status |
MEDLINE
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pubmed:issn |
1001-0742
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
20
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
207-15
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pubmed:meshHeading |
pubmed-meshheading:18574963-Air Pollutants,
pubmed-meshheading:18574963-Biomass,
pubmed-meshheading:18574963-China,
pubmed-meshheading:18574963-Environmental Monitoring,
pubmed-meshheading:18574963-Methane,
pubmed-meshheading:18574963-Nitrous Oxide,
pubmed-meshheading:18574963-Rain,
pubmed-meshheading:18574963-Seasons,
pubmed-meshheading:18574963-Seedling,
pubmed-meshheading:18574963-Soil Pollutants,
pubmed-meshheading:18574963-Temperature,
pubmed-meshheading:18574963-Trees,
pubmed-meshheading:18574963-Tropical Climate,
pubmed-meshheading:18574963-Water
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pubmed:year |
2008
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pubmed:articleTitle |
Fluxes of CH4 and N2O from soil under a tropical seasonal rain forest in Xishuangbanna, Southwest China.
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pubmed:affiliation |
Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China. yanyp@xtbg.org.cn
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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