[Parameters: Topic='LAND SURFACE', Term='SOILS', Variable_Level_1='SOIL MOISTURE/WATER CONTENT']
LBA-ECO TG-07 Soil Trace Gas Flux and Root Mortality, Tapajos National ForestEntry ID: LBA_TG07_STGFARM
Abstract: We conducted an experiment on sand and clay tropical forest soils to test the short-term effect of root mortality on the soil-atmosphere flux of nitrous oxide, nitric oxide, methane, and carbon dioxide. We induced root mortality by isolating blocks of land to 1 m using trenching and root exclusion screening. Gas fluxes were measured weekly for ten weeks following the trenching treatment. For ... nitrous oxide there was a highly significant increase in soil-atmosphere flux over the ten weeks following treatment for trenched plots compared to control plots. N2O flux averaged 37.5 and 18.5 ng N cm-2 h-1 from clay trenched and control plots and 4.7 and 1.5 ng N cm-2 h-1 from sand trenched and control plots. In contrast, there was no effect for soil-atmosphere flux of nitric oxide, carbon dioxide, or methane.
Data Set Citation
Dataset Originator/Creator: KELLER, M.M.VARNER, R.K.
Dataset Title: LBA-ECO TG-07 Soil Trace Gas Flux and Root Mortality, Tapajos National Forest
Dataset Release Date: 2009
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/924Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=924&term2attribut...
Start Date: 2000-06-04Stop Date: 2001-05-15
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > METHANE
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > NITROGEN OXIDES
ATMOSPHERE > ATMOSPHERIC CHEMISTRY > NITROGEN COMPOUNDS > NITROUS OXIDE
AGRICULTURE > SOILS > SOIL MOISTURE/WATER CONTENT
LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
AGRICULTURE > SOILS > SOIL TEMPERATURE
LAND SURFACE > SOILS > SOIL TEMPERATURE
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Creation and Review Dates
DIF Creation Date: 2009-04-30
Last DIF Revision Date: 2013-08-27