Long-term effects on distribution of forest biomass following different harvesting levels in the northern Rocky Mountains

摘要: Abstract With increasing public demand for more intensive biomass utilization from forests, the concerns over adverse impacts on productivity by nutrient depletion are increasing. We remeasured 1974 site of Forest Residues Utilization Research and Development in northwestern Montana to investigate long-term aspects productivity. The historical experiment was implemented a western larch ( Larix occidentalis Nutt.) forest at three levels (high, medium, low) combined with prescribed post-harvest burning treatments (burned unburned) under regeneration cuttings (clearcut, group selection, shelterwood). has two replicates designed as split-plot design an imbalanced manner. Regenerated tree height diameter breast height, shrub root collar diameter, soil properties (C, N, total organic matter) floor mineral layers were measured. tree, shrub, aboveground C, matter contents calculated. Results indicated that pools ecosystem level similar across cutting treatments, there no differences among either production or 38 years after harvest. Minor observed seemed originate dynamics responses treatment. Our results indicate this type unaffected these levels.