Ecological and economic assessment of quality losses of stem timber after the impact of forest fires and insects

The research objective was the assessment of impact of the fires, insects and windfall on the quali-ty of stem timber on the example of the woods of Krasnoyarsk Region, and also the development of the correcting coefficients in calculation of payment for preparation of business wood in the plantings damaged by the fires, insects and windfall. The objects of our researches were the woods of Kras-noyarsk Region. Total square covered with the wood within lands of forest fund of the region on 01.01.2015 made 105.1 million hectares. The main forest forming species of forest fund are a larch, a birch, a pine and a cedar. The woods on the pur-pose are subdivided on protective (the area of 51 880 hectares), operational (62 352.2 thousand hectares, or 39.3 % of lands of forest fund) and reserve (44503.6 thousand hectares). The major factors reducing the quality of stem timber as a re-sult of impact of the fires and insects on a forest stand were revealed. Statistical datum of these dy-namics of the area of the plantings which were lost as a result of impact of the fires, insects and a windfall was analyzed. It was established that as a result of impact of the fires and insects in pine plantings the part of trees perished at once, and the main postfire fall of the trees occurred within the first 2-3 years. The changes in time of quality of stem timber after the impact of forest fires, insects and a windfall depending on the species of a tree were defined. Decreasing coefficients for plantings depending on the quality of stem timber changed as a result of the impact of the fires and insects were brought. The need of entering of additions into a method of calculation of payment for wood was considered. For the purpose of identification of reserves of growth of the forest income methodical approach to determination of decreasing coefficient allowing to correct rates of calculation of a payment for unit of volume of business timber received when developing of damaged forest plantings was of-fered. Correcting coefficients were offered and rec-ommendations about calculation of a rent for the boreal woods after impact of the fires were made.