ОПТИМАЛНИ ТУРНУСИ НА СЕЧ ЗА ИЗДЪНКОВИ ДЪБОВИ НАСАЖДЕНИЯ В БЪЛГАРИЯ.

In last two decades a problem for determination of optimal rotation ages when considering not only wood production but carbon uptake has had big importance. The coppice stands in Bulgaria occupy approximately 47% of the forest area. The biggest part of it consists of species of genus Quercus which are managed by two silvicultural systems: traditional coppicing and conversion from coppice to high forest. The aim of this paper is to propose optimal rotation ages based on biological and technical maturity for two types of coppice oak stands: for compulsory conversion to high forest and for mixed coppice-seed management. Based on data obtained from forest management plans and temporary sample plots we propose different rotation ages from official regulations for main oak species and recommend some guidelines for forest management of coppice oak stands. [ABSTRACT FROM AUTHOR]