FEATURES OF GROWTH OF PLANTS OF KOREAN CEDAR PINE AFTER SELECTIVE LOGGING
In this work, complex studies of the relationship of taxational displays were carried out on 15 trial areas laid in stands of Korean pine growing in the Khabarovsk territory and the Jewish Autonomous region and passed by logging operations. The remaining pine trees of cedar age drill at a height of 1.3 m determined the age. The age variation in thickness steps reaches two or more age classes. The whole set of model trees (558 pieces) belongs to the category of different-age stands. According to the correlation coefficients between age and height, age and diameter, the sample areas are differentiated into two types of age structure: single-age and multi-age. Most of the sample areas (67%) belong to different age stands. Cedar reacts to the changed growing conditions after cutting by the size of the increase in diameter. Immediately after felling (5 and 10 years), the value of the radial growth is slightly dependent on the growth of the tree, the length of the crown and the diameter at a height of 1.3 m. After 15 years, the relationship was restored - the multiple correlation coefficient increased to 0.78. When describing the relationship between age and diameter at a height of 1.3 m with a parabola of the 3rd order, it was established that the type of age structure has a multidirectional effect on the parameters of the cubic regression. Therefore, the model trees were grouped by growing area. For the combined set of model trees, regression equations are selected, based on which the age and speed of transition of trees from stage to stage is determined for each stage of thickness. In the Lazovsky district, the cedar will spend 129 years on the transition from step 12 to step 56, in the Nanai district - 133, in the irradiation District - 110 years.