Features of the growth of amur linden in the cedar forests of the far east

Abstract

Cedar-broadleaved forests in the Far East occupy an area of just over 3 million hectares. The Amur linden (Phellodendron amurense) is a permanent participant of the forest formation process in cedar-broadleaved forests. Volumetric, assortment and commodity tables were developed for this species in the last century. There are no growth progress tables for this species. In the present article, the growth rate tables for Amur linden were constructed based on the materials of the state forest inventory. Experimental material was 254 model trees of Amur linden from permanent plots laid in plantations of different forest types and bonitet classes. Two approaches were used to study the growth patterns of Amur linden. In the first case, tree diameter was taken as an independent variable in the alignment of taxation indices, while in the second case, tree age was taken as an independent variable. By design, the first variant of the growth rate table corresponds to a discharge scale of volumes, in the second case, to the generally accepted form. In both variants, the total tree productivity as well as bark volume were calculated. The number of trunks was calculated through the thinning constant. In plantations, Amur linden occurs both as single specimens and in groups of 10 to 30 trees. In the analyzed sample, the maximum age of linden trees is 190 years, height 30 m, diameter 100 cm or more. The developed tables of the course of growth reflect the growth patterns of the Amur linden growing in the Amur- Priamorsky coniferous-broadleaf region. The compiled productivity tables can be used to calculate timber reserves, honey production, bark volumes, the amount of damage when plantations are damaged by fires, and for other purposes. The high growth rate of Amur linden trees at a young age indicates that this species is promising for afforestation.