THE EFFECT OF DIFFERENT TENDING FELLING REGIMES ON GROWTH, PRODUCTIVITY AND MERCHANTABLE STRUCTURE OF ARTIFICIAL PINE STANDS IN IZYUM PINE FOREST

O.M. Tarnopilska

Abstract


The results of studies of tending felling regimes impact on inventory indices, stability, productivity, and merchantable structure of artificial Scots pine (Pinus sylvestris L.) stands are presented. The studies were carried out on stationary research objects of Izyum steppe bor (pine forest on sandy ground) in A1-2 (fresh bor) and A2 (fresh bor) forest site conditions. Optimal parameters of the felling intensity and repeatability were determined. It was found that the preference should be given to intensive tending felling in artificial pine stands, depending on the density and conditions of plantations. It was also discovered that the average height and diameter of the remained trees were significantly increased with increasing thinning intensity, improving the merchantable structure and increasing the pine stands resistance to physical stress. The gradual increase in the intensity of tending felling causes growing stock depletion, but over time the stock reaches almost the same amount in variants with tending felling carried out and without it.

Keywords


artificial Scots pine stands; different methods and intensity of tending felling; forest inventory indices; merchantable structure

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