A new variant to determine the annual allowable cut for regular high forest system or group selection system by age classes method

摘要

The procedure of establishing the annual allowable cut using the methodof age classes for regular high forest system or the method of revocable peri-odic block for group selection system, which are recommended by the Roma-nian guidelines for forest management (Ministry of Silviculture, 1986) oftenseems not to assure good results.The new variant proposed in this paper keeps the principle of the classicalmethod of age classes, but it has a dynamic character comparing to the classicvariant and it assures the continuity of wood volume.Stand establishment in periodic block is based both on the differencesbetween the actual age and exploitability one, and the regeneration period.After the normalization of the periodic block the annual allowable cut by vo-lume, assuring the continuity of the production on the first rotation. The newvariant results seem to be clearly more close to the forest reality