Наукові горизонти (Mar 2020)

FEATURES OF THE GROWTH OF MODAL ARTIFICIAL OAK STANDS OF THE LEFT-BANK FOREST-STEPPE ZONE AND USING THE FOREST GROWTH POTENTIAL

  • L. Lunachevskyy ,
  • M. Rumіantsev

DOI
https://doi.org/10.33249/2663-2144-2020-88-3-106-115
Journal volume & issue
Vol. 88, no. 3
pp. 106 – 115

Abstract

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Yield tables are the basis of regulatory materials for forest fund accounting, design and planning of forestry operations, and implementation of measures to increase forest productivity. Growth modeling of oak stands and construction of yield tables were performed according to generally accepted methods by analyzing the Database of Production Association «Ukrderzhlisproekt». The correlation bonds of the main taxations indexes of artificial oak stands within the territory of the Left-bank Forest-Steppe zone were revealed. The calculated correlation coefficients to select adequate regression models of growth were used. To simulate the growth processes of forest plantations, the Mitcherlich function is used which takes into account the biological features of oak growth. On the basis of presented the mathematical models regional tables of growth of modal and reference plantations artificial oak forest stands of the Left-bank Forest-steppe zone of Ukraine created in conditions of fresh maple-lime oak forest are compiled. The resulting yield tables describe tree stands and their removed parts (due to natural thinning or forest management operations). It is determined that the age of quantitative maturity of the reference artificial oak stands comes earlier (43 years) than of the modal artificial oak stands (48 years). The index of the forest growth potential utilization of forest lands is defined for modal stands of artificial origin in the studied forest area. By comparison with reference artificial oak stands of the Left-bank Forest-steppe zone the importance of indexes of the forest growth potential utilization of forest lands is in the range of 49 % (stands 10 years old) to 83 % (stands 120 years old). The weighted average was 75 %. The resulting yield tables of modal and reference plantations artificial oak forest stands of the Left-bank Forest-steppe zone of Ukraine it is appropriate to apply at the time of the planning of forestry operations (in particular care fellings).

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