Title: Fuels consumption and nitrogen loss following prescribed fire: a comparison of prescription types in the Southern appalachians
Author: Clinton, Barton D.; Vose, James M.
Source: e-Gen. Tech. Rep. SRS–101. U.S. Department of Agriculture, Forest Service, Southern Research Station: 231-240 [CD-ROM].
Description: Prescribed burning is frequently used as a tool for restoration of plant communities, wildlife habitat improvement, and site preparation. We compared and contrasted the effects of four burning prescriptions on forest floor and fine fuels consumption, and nitrogen loss. The burning treatments included dry (DU) and mesic (MU) understory burns, stand replacement (SR) burning, and fell and burn (FB) site preparation. On all sites, forest floor was sampled before and immediately after burning. It was separated into woody fuels (< 7.5 cm in diameter), the Oi layer (litter), and the Oa + Oe layer (fermentation plus humus), and dry weight and nitrogen content of each component was determined. Tiles with heat-sensitive chalk and paint were used to estimate flame intensity at 30 cm above the forest floor. Mean peak flame temperatures ranged from 700 ºC for the FB treatment to 169 ºC for the MU burn. Except in the FB treatment, which had a substantial amount of woody mass on the forest floor as a result of felling overstory trees and shrubs, the majority of pre-burn mass and nitrogen was contained in the humus layer. Following burning, mass loss ranged from 88 Mg ha-1 (90 percent wood, 10 percent litter, < 5 percent humus) on the FB treatment to 5 Mg ha-1 (5 percent wood, 55 percent litter, 40 percent humus) on the MU burns. Nitrogen losses followed similar patterns – 292 kg ha-1 (70 percent from wood, 28 percent litter, < 5 percent humus) on the FB to 30 kg ha-1 (65 percent from wood, 35 percent litter, < 5 percent humus) on the SR site. High-intensity ground fires may result in greater losses of site nutrients, and this may have negative short- and long-term consequences.
View or Print this Publication (290 KB bytes)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
Clinton, Barton D.; Vose, James M. 2007. Fuels consumption and nitrogen loss following prescribed fire: a comparison of prescription types in the Southern appalachians. e-Gen. Tech. Rep. SRS–101. U.S. Department of Agriculture, Forest Service, Southern Research Station: 231-240 [CD-ROM].
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility