Growth and Development of Planted Northern Red Oak on Bulldozed Skidroads After Clearcutting in Appalachian Hardwoods Forest Service research paper

摘要

Artificial regeneration of northern red oak in Appalachian clearcuts on mesic sites is hindered by accessibility and competition from developing vegetation. The use of skidroads as a planting medium was evaluated on two clearcuts with contrasting aspects in north-central West Virginia. Stratified acorns were planted in tree shelters at three positions (cut, middle, fill) on the roadbed and one position (off road) adjacent to the roadbed. Height growth, percent survival, competitive status, and potential crop trees (PCT) were measured after eight growing seasons. Bulk density and percent soil moisture and organic matter also were measured. Height growth was greatest on the off-road and fill positions. The overall height difference (1.5 feet) between off-road and fill positions was less than expected from measurements of soil parameters. Roadbed bulk densities were highest at the cut and lowest at the fill positions. Bulk densities were lowest at the off-road positions. Roadbed moisture content remained about 40 percent lower than that at off-road positions throughout the year. Increased soil depth and organic-matter content from soil deposited at the fill position may have offset some effects of soil compaction. Reduced competition improved the competitive status of all roadbed trees, though competitor trees on average were 4.4 feet taller than PCTs after 8 years. The results indicate that the fill portion of newly constructed skidroads can be used by land managers to facilitate enrichment plantings in Appalachian clearcuts.