FORESTRY POTENTIAL OF INCREASING PINE FORESTSPRODUCTIVITY IN WESTERN SIBERIA

The article touches upon the reasons why pine forests in Western Siberialoose their productivity. The main reasons of these losses are: harsh climate, waterloggedterritories, poor forest growth conditions, forest fires and failure to comply withrational exploitation methods. Conditionally continuous felling and failure to finish cuttingtrees result in direct wood loss. Because of these reasons lack of growth exceeds5 mln m3 per year. Forestry aims at increasing plantation productivity, retaining and improvingincrease rate: it is facilitated by sampling dry, dwarfed and defected trees. Theattendance being taken in a right way, increase rates of section area and stem wood increase.Analyzing plantation growth according to stem section area in unmixed pine forests,attendance cuttings should start when young trees link their crowns and be carriedout after each anthropogenic disturbance and decrease in plantation increase rates. Inmixed young growths and mean-aged plantations attendance should be aimed at formingunmixed pine forest stands: first of all trees of other breeds are cut down and only thendefected and suppressed specimens of the main breed.

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