Az oldal 2020-tól nem frissül. Friss információkért látogasson el az alábbi oldalra: https://ojs.lib.unideb.hu/kitaibelia

Kivonat:

The new Hungarian Law on Forestry (1996) and the Law on Nature Conservation (1996) simultaneously prescribe a more natural silviculture. The Law on Forestry emphasizes that „sustainable silviculture” should maintain high biodiversity, fertility, vitality and the potential for the renewal of forests. According to both laws, a census of the non-protected forested areas with valuable, diverse floristic and faunistic composition should have been taken till the end of 1998.

In the last two years, numerous papers related to the above aims and prescriptions were published, in which forest scientists (and partly also botanists) discussed various theoretical and practical problems like:

(1) naturalness of forests and its criteria (alternatives: the use of the whole floristic composition, the use of the species composition in the tree layer, the use of the stand structure in judgement of naturalness),

(2) the use and importance of historic phytosociological descriptions in the identification of plant communities when surveying valuable forest stands,

(3) even aged, managed, „economic” forests and forests with diverse age distribution and their properties (the need for intact virgin forests),

(4) the aspects of recent environmental deterioration affecting the composition and existence of forest communities (e.g.: a decrease in the water table in the Great Hungarian Plain and forest decline) and the proper forestry strategy (alternatives in the use of native and exotic tree species).

The author contributes to some of the above topics and disagrees with some views. In his opinion, the characterisation of forests based on the whole floristic composition is a good way. The importance of using indigenous tree species and preserving native stands in forest management is highly stressed.