ANALYSIS OF SOIL CARBON FRACTIONS FROM PRE-TREATMENT CORES FROM THE LONG-TERM BIOMASS EXPERIMENT
Location: Grassland, Soil and Water Research Laboratory
Project Number: 6206-11220-005-09
Specific Cooperative Agreement
Start Date: Jan 01, 2011
End Date: Dec 31, 2015
Measure soil microbial activity and soil carbon fractions of pretreatment soils collected from the Long Term Biomass Experiment at Temple, TX.
GSWRL will collect soils from 24 experimental plots. Soil samples consist of soils from 0-3, 3-6, 6-12, 12-24, and 24-36" depth increments from three pooled 1.5" diameter cores per plot. Coarse (>250 micrometer) and fine (250-53 micrometer) particulate organic matter will be assessed on these samples using established procedures.
Active soil microbial biomass will be determined using a substrate-induced respiration technique, and long-term (1-year) laboratory incubations will be conducted on two subsamples from each plot. These 1-year incubations will be used to determine soil pool sizes and turnover using a two-pool model of soil organic matter decomposition.