ESTIMATION OF THE CARBON BUDGET OF STEM WOOD FALLING OF PINE PLANTATIONS OF SIBERIA BY GROWTH TABLES
The aim of the study was to estimate the value of the natural fall-off in the reserve in the pine plantations of Siberia, which would allow the most objective approach to the appointment of various types of economic activities and the assessment of biological productivity of plantations. As initial data the tables of growth of pine plantings of Siberia were used. They were supplemented with information on the size of phytomass and carbon fallout. As a result of the research, the following conclusions were obtained. The analysis showed that any regularity taking into account the type of forest was not revealed. The magnitude of the falloff is largely dependent on the size and quantity of its parameters, and is largely associated with the average taxation characteristics of plantations. With a decrease in the quality of the growing conditions (III-IV class of quality), there is a shift in the maximum age of carbon in the dropout (III - 70 years, IV - 130 years) and carbon size in diameter (III - 26.2 cm, IV - 23.5 cm). The age of the maximum reserve of phytomass of natural thinning varied from 20 to 190 years, depending on the category of plantings (normal, modal), forest type and classes of vegetation. In the distribution of the carbon stock of the fall-off of trees with age, the following regularities are distinguished: the value of the fall-off is insignificant and practically does not change with age; the maximum fall-off is observed at a young age, and then this value decreases; the carbon stock of the fall-off gradually increases, reaches the extreme point and then decreases; two maximum points are revealed at a young and The following regularities were revealed in the distribution of the carbon stock of tree fall-off depending on the average diameter of the stand: the fall-off value is insignificant and practically does not change; the maximum dropout is observed at a young age, and then this value decreases; the carbon stock gradually increases, reaches the extreme point, and then decreases. The carbon stock of the fall-off of trees in the pine stands of Siberia depends on the age of the stand, the category of completeness (modal, normal), the observation period, the area of growth and to a lesser extent on the conditions of the place of growth of this plant (the class of Bonita and the type of forest).