Stand Characteristics of 65-Year-Old Planted and Naturally Regenerated StandsNear Sequim, Washington

摘要

Tree numbers, height, and volume were determined in six 63- to 66-year-oldplantations of coast Douglas-fir (Pseudotsunga menziesii (Mirb.) Franco var. menziesii in northwest Washington. These stands resulted from the first extensive plantings of this species in the Pacific Northwest. Data from 0.25-acre plots in these plantations were compared to those from matched plots in adjacent, naturally regenerated stands with the same history of logging, wildfire, and absence of further siviculture after regeneration. Planting resulted in well-stocked Douglas-fir stands with volunteers of other tree species. Natural seeding resulted in similarly stocked stands of western hemlock (Tsunga heterophylla (Raf.) Sarg.) with Douglas-fir in the dominant crown class.