Oak Ridge National Laboratory Distributed Active Archive Center

nasa-ornldaac-924

LBA-ECO TG-07 Soil Trace Gas Flux and Root Mortality, Tapajos National Forest

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.

daac.ornl.gov

http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=924

Identified by : LBA_TG07_STGFARM

This dataset was released on January 01, 2009.

The time range for this dataset is June 04, 2000 to May 15, 2001.

The spatial range for this dataset is -3.017° to -3.017° latitude, and -54.9707° to -54.9707° longitude. map

DOI : 10.3334/ORNLDAAC/924
Also known as :

• dataset oai:mercury-ops2.ornl.gov:ornldaac_924 (ornl lexicon)
• dataset oai:mercury.ornl.gov:ornldaac_924 (ornl lexicon)