tailieunhanh - Báo cáo lâm nghiệp: "derivation of target stocking for forests of norway spruce vegetation zone in slovaki"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: derivation of target stocking for forests of norway spruce vegetation zone in slovakia. | JOURNAL OF FOREST SCIENCE 53 2007 8 352-358 Derivation of target stocking for forests of Norway spruce vegetation zone in Slovakia M. Moravcik National Forest Centre - Forest Research Institute Zvolen Slovak Republic ABSTRACT The present paper deals with derivation of target stocking in forests of Norway spruce vegetation zone. Target stocking in forests with prevailing ecological and social functions is the stocking when the forest fulfils demanded functions in the best way. For forests in the Norway spruce vegetation zone target stocking was derived by original procedures as an optimum stocking in harmonization of demands on the fulfilment of ecological functions especially erosion control hydrological and water protection ones securing static stability and preconditions for the formation and growth of natural regeneration. We investigated the relations between stocking and indicators of static stability slenderness coefficient and ratio of crown length to tree height natural regeneration phases ground and non-wood vegetation coverage and natural regeneration coverage. The most favourable status of these indicators was found out in stocking and in the upper forest limit . Keywords Norway spruce vegetation zone target stocking static stability slenderness coefficient As a rule stocking is defined as an indicator of the growth space utilization by a forest stand. According to Gregus 1976 target stocking is the stocking when the stand fulfils the determined functions in the best way. In commercial forests it is mainly production of wood and simultaneously fulfilment of other functions in protective forests mainly fulfilment of publicly beneficial ecological and social functions Midriak 1994 . Gregus 1989 considered target stocking as an important component of management objectives especially because it informs us though indirectly but clearly about the fulfilment of desired functions and about the phase of regeneration. Especially by a change in stocking the

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