Siberian cedar in subordinate crops

Abstract

The growth indices of the 56-year-old Siberian cedar, which grows in forest crops under the forest stand canopy of Pinus sylvestris and Betula pendula when the canopy closed 0.1–0.4; 0.5-0.7; 0.8-0.9 and the number of survived specimens in the sites (from 1 to 8 pcs.) in the suburban area of Krasnoyarsk. Initially, in each area measuring 0.7×0.7m, 9 pieces of four-year-old seedlings were planted under the Kolesov’s planting iron, placing them at a distance of 20 cm. There is a distance of 4 m between the centers of the sites. It was found that indicators of leading trees such as height, diameter of the trunk and crown significantly decrease with increasing closeness of the canopy (the share of the influence of canopy on the height of the leading trees amounted to 84.8%, to the barrel diameter - 91.3%). The share of the influence of the number of Siberian cedar trees preserved in the sites on the indicators of leading specimens is insignificant and amounted to 3.9% in height and 1.7% in trunk diameter. The creation of Siberian cedar cultures is recommended with a lesser density of the forest stand canopy or in an open area.