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A Non-destructive Method for Estimating Tree Biomass
出版Ontario Forest Research Institute, 1997
主題Photography / ReferenceTechnology & Engineering / Agriculture / Forestry
ISBN07778676489780777867648
URLhttp://books.google.com.hk/books?id=6j0Spp10gBYC&hl=&source=gbs_api
註釋Photo imagery is a promising non-destructive method for estimating the above-ground biomass of tree seedlings. This report describes a test of this new method using 9-year-old naturally regenerated white spruce seedlings growing in the understory of a mixed conifer shelterwood. The seedlings were exposed to one of three mechanical release treatments to examine the effects of seasonal timing of release on physiology and growth of white spruce. Two photographs of each seedling were taken in the field and used to measure the vertical projected area of the seedling crowns. The seedlings were then harvested, separated, and dried to estimate total above-ground and component biomass. Regression analysis was used to determine the relationship between seedling biomass and projected area. The results indicate the usefulness of photo imagery as an alternative to traditional methods of biomass estimation.