P-07 木質バイオマス生産量に影響する皆伐の制度的制約

抄録

The increase of woody biomass demand for electricity in Japan has promoted log production in many regions, together with large-scale and stable log demand of sawmills which have pursued the advantage of scale. By contrast, only limited planted forests fulfill requirements necessary for efficient logging operation such as stand conditions, forest road conditions and forest owners’ agreement, and increase of clearcutting is required for short-span increase of log production. Then, the constraint of clearcutting ruled in Forest Management Plan system, which has promoted sustainable forest management by motivated management bodies, can be an obstacle. Clearcutting is not allowed when its harvested logs exceed the ruled constraint, meaning that what can affect the available amount of clearcutting log volume are the current volume and distribution of non-industrial stands within the target of each Forest Management Plan.