Calculating the amount of forest biomass extractable by commercial thinning in relation to the price of domestic timber
2007
Tsuchiya, A.(Aichi-ken. Government Office, Nagoya (Japan)) | Yamada, Y. | Nakazawa, M. | Yoshida, C. | Jinkawa, M.
We calculated the potential forest biomass that could be obtained from commercial thinning in terms of the price of domestic timber, without a subsidy for thinning. Then, we considered six subsidies, divided into three types, and examined the impact of these subsidies on forest biomass. The calculation of potential forest biomass included four conditions for judging the feasibility of commercial thinning. Under these conditions, the feasibility of commercial thinning was determined by comparing the price of domestic timber with the production cost of thinning, and calculating the amount of extractable forest biomass. For the region examined (Toei-cho, Kitashitara-gun, Aichi Prefecture, Japan), we calculated that there was a small potential amount of forest biomass in commercial thinning areas for the fiscal years 2002 to 2004. This was because the extraction ratio was low, due to the long extraction length and low price of timber in the region. When subsidies were considered, the variance in the ratio of the extractable amount of forest biomass differed when all the thinned trees were extracted and when timber alone was extracted.
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