Whole-Tree Harvesting: Nutrient Depletion Estimates and Post-Harvest Impacts on Nutrient Dynamics. Third Year Progress Report for 1981

摘要

Scientists at Oak Ridge National Laboratory are coordinating investigations on the environmental effects of residue removal and whole-tree utilization for several forest types in the United States. Sites were selected to include central hardwoods, northern hardwood, northern coniferous, southern appalachian oak-hickory, northwestern coniferous, and southern pine forests. All sites have been established at locations having a long history of biomass and nutrient cycling research to provide a foundation of data to assess the effects of whole-tree harvest on erosion, nutrients, water quality, and productivity. This report (the third in a series) describes the sites and sampling procedures and reports some data regarding direct effects of intensive harvesting. Harvesting, including bole-only and residue removal, is complete at most sites, and some ecosystem nutrient budgets are presented. Aboveground biomass and soil nutrient pools (N, P, K, Ca, Mg) are also given. Preliminary post-harvest effects data are discussed. (ERA citation 07:058225)