Ukrainian Journal of Forest and Wood Science

The urgency of the problem lies in the need to have indicators of the structure of the stands in the development of commodity tables of alder gray on the basis of existing assortment tables for this breed. The aim of the work was to establish the parameters for the distribution of alder stands of gray alder in diameter. The methods of investigation were conventional taxation, silvicultural and statistical methods. Results of the study: on the material of 229 trial plots laid in different forest sub-zones in the forests of Belarus, the structure of the diameter of the alder stands of black alder and olhi gray was studied. It is established that the distribution of trees along the diameter corresponds to the curve of the generalized normal distribution (curve type A). The age-dependent dynamics of the structure of alder stands is characterized by 3 series of distribution: up to 20 years; 21-40 and more than 40 years. For the development of commodity tables, it is legitimate to use one combined distribution series for ripening, ripe and overmature stands. the obtained results will be used in the development of commodity tables for alder gray.

alder black, alder gray, stand structure, curve type A, dynamics of stand structure