Five-year vegetation control effects on aboveground biomass and nitrogen content and allocation in Douglas-fir plantations on three contrasting sites
نویسندگان
چکیده
University of Washington, School of Forest Resources, Box 352100, Seattle, WA 98195, United States USDA Forest Service, Pacific Northwest Research Station, 3625 93rd Ave., SW, Olympia, WA 98512, United States Weyerhaeuser Company, Western Forestry Research, Centralia, WA 98513, United States Minnesota Forest Resources Council, St. Paul, MN 55108, United States Glen Burnie High School, Glen Burnie, MD 21060, United States Virginia Water Resources Research Center, College of Natural Resources and Environment, Virginia Tech, Blacksburg, VA 24061, United States
منابع مشابه
Soil carbon and nutrient pools in Douglas-fir plantations 5 years after manipulating biomass and competing vegetation in the Pacific Northwest
We assessed changes in mineral soil total carbon (C) and nutrient (exchangeable Ca, K, Mg, and total N) pools to 60 cm depth 5 years after manipulating biomass and competing vegetation at two contrasting Douglas-fir plantations (Matlock, WA, and Molalla, OR). Biomass treatments included whole-tree (WT) and bole-only (BO) harvest, and competing vegetation control (VC) treatments were applied as ...
متن کاملEffects of logging debris treatments on five-year development of competing vegetation and planted Douglas-fir
Although considerable research has focused on the influences of logging debris treatments on soil and forest regeneration responses, few studies have identified whether debris effects are mediated by associated changes in competing vegetation abundance. At sites near Matlock, Washington, and Molalla, Oregon, studies were initiated after timber harvest to quantify the effects of three logging de...
متن کاملEvaluating a simple radiation/dry matter conversion model using data from Eucalyptus globulus plantations in Western Australia.
A simple model that describes growth in terms of physical and physiological processes is needed to predict growth rates and hence the productivity of trees at particular sites. The linear relationship expected between absorbed photosynthetically active radiation (phi(pa), MJ m(-2)) and dry mass production (G(t)); i.e., G(t) = epsilonphi(pa), where epsilon is the radiation utilization coefficien...
متن کاملUnderstory vegetation leads to changes in soil acidity and in microbial communities 27 years after reforestation.
Experiments with potted plants and removed understories have indicated that understory vegetation often affects the chemical and microbial properties of soil. In this study, we examined the mechanism and extent of the influence of understory vegetation on the chemical and microbial properties of soil in plantation forests. The relationships between the vegetational structure (diversity for diff...
متن کاملPotential of Landsat-8 spectral indices to estimate forest biomass
Forest ecosystems are among the largest terrestrial carbon reservoirs on our planet earth thus playing a vital role in global carbon cycle. Presently, remote sensing techniques provide proper estimates of forest biomass and quantify carbon stocks. The present study has explored Landsat-8 sensor product and evaluated its application in biomass mapping and estimation. The specific objectives were...
متن کامل