Tuesday, November 6, 2007
216-2

Carbon and Nitrogen Dynamics in Soil Following Prescribed Burning and Thinning in the First Stages of Southern Appalachian Forest Ecosystem Study.

Maria Nobles, P.O. Box 1208, Alabama A&M University, Alabama A&M University, Department Of Plant & Soil Science, Normal, AL 35762-1208, Wallace Dillon Jr., Department of Plant and Soil Science, Alabama A&M University, P.O. Box 1208, Normal, AL 35762-1208, and Monday Mbila, Alabama A&M University, 4900 Meridian Street, Department Of Plant & Soil Science, Normal, AL 35762.

Forest management practices such as prescribed burning and thinning are commonly used to restore degraded forest communities in southern forest regions. Prescribed burning and thinning can negatively affect soil and forest floor by removing organic matter and reducing beneficial nutrients such as C and N through volatilization and leaching. Organic matter combustion during fire is of particular significance, as it may lead to the subsequent release of greenhouse gasses such as CO2, CH4 and N2O. This study was conducted to investigate impacts of prescribed burning and thinning on total carbon and nitrogen pools in the first stages of a time-series study. The effects of several burning and thinning treatments were tested on a Typic Hapludults at the Bankhead National Forest in Northern Alabama. Changes in carbon and nitrogen distribution in forest ecosystems were identified and the impact of burning and thinning on carbon sequestration potential was accessed.