Influence of Residue Removal and Prescribed Fire on Distributions of Forest Nutrients

摘要

The effects of two levels of residue (removal of all woody material larger than 15 x 180 cm and 10 x 120 cm) on the distribution of nitrogen and sulfur on the forest site and the added effects of postharvest prescribed fire on those distributions were studied in the Cascade Range in Oregon. Nutrients lost from increased removal of residue were small compared with nutrients removed in merchantable timber. Differences in the amount of nutrient capital removed during harvest between the two levels of residue removal amounted to 1 percent of the total site nitrogen and 4 percent of the total site sulfur. The amount of nutrient lost during fire depended not only on residue levels, but also on moisture content of residue and duff.