Patterns and Controls of N2O and CH4 Fluxes (LT15)
Arvin R. Mosier, P.O. Box E, Ft. Collins, CO 80522-0470
970-490-8250 amosier@lamar.colostate.edu
David W. Valentine
D.S. Schimel
William J. Parton
Objective: 1) Long term monitoring of N2O and CH4 fluxes. 2) Evaluate the effect of soil texture, N-fertilization, etc., on N2O and CH4 fluxes. 3) Quantify physical and biological processes which regulate these fluxes.
Methods: At each site 8" diameter X 4" high PVC tubes have been driven into the soil, 1 cm remains above the soil surface. These "rings" serve as anchors for gas flux monitoring chambers. Fluxes are measured 1-5 times each week at each location. Soil gas probes (3 at each site) have been inserted 50cm into the soil to permit soil gas analyses. Soil samples are collected from each site weekly.
Study Area: Pastures, fertilized and unfertilized pastures, catena, and catena with soil textural variates. Using 22SE, 23SW, 26S and 25SE (begun using this site September, 1991). We would also like to start a new site in pasture 26NE. We will locate PVC pipe (8" X 4") tubes in both the native rangeland and in that area that was plowed in the past. We will setup 6 tubes in each treatment. We also want to plow approximately 10m2 of native rangeland.
Link to Data and TRAGNET Network of Sites:
http://www.nrel.colostate.edu/projects/tragnet
03/21/2002