About the Journal

Authors: 

A. E. OSIPENKO, post-graduate student,

S. V. ZALESOV, doctor of agricultural sciences, professor, head of the department,

URAL STATE FOREST ENGINEERING UNIVERSITY (37 Sibirskiy tract, 620100, Ekaterinburg)

Abstract.  The relationship between the initial density of plantations and the actual taxation parameters of the plantations aged between 13 and 81 years were analyzed on the basis of 57 sample plots in the artificial pine plantations of the southwest of the Altai territory. Researches cover forest stands from 13 to 81 years of age, the II–V yield classes, located on various elements of mesorelief (tops, slopes and the foot of the hils). Researches were conducted in the Barnaul tape pine forest on the territory of the Rubtsovsk and Uglovsky administrative regions. It was found that: about 50 % of the trees at the foot and on the slopes of the hills die during first 25 years after planting; 65 % of the trees on the tops of the hills die for the same period; mortality slows for the trees aged over 25. The dynamics shows the necessity to conduct thinning in tape pine forests of the Altai region, with a decrease in the density of leaves left on the rearing of the tree stand up to 2.5–3 thousand units/ha. and thinnings with reduced thickness up to 1–1.5 thousand units/ha. To improve the stability of forests against fires, one cuts the branches of the left on rearing trees to a height of 2.5 m. The original density of the forest cultures should be of 5–6 thousand units/ha., which provides greater stability and better cleaning. The lower planting density, as a rule, leads to sparse and low-productivity forests.