ТАКСАЦІЙНІ ПОКАЗНИКИ ЛІСОВИХ КУЛЬТУР ДУБА ЧЕРВОНОГО (QUERCUS RUBRA DU ROI) В УМОВАХ ПІВНІЧНОЇ ПІДЗОНИ СТЕПУ УКРАЇНИ
Journal Title: Питання біоіндикації та екології - Year 2015, Vol 20, Issue 2
Abstract
The aim of this work is to implement the valuation of forest plantations of the red oak in the experimental area in the Northern subzone of the Steppe of Ukraine. The research was carried out in the Leninsky forestry of SE "Dnipropetrovsk forestry" on stratum with pure cultures of the red oak. To study and evaluate taxali indicators we have carried out inventory of forest crops of red oak. It is determined that the total number of trees on the stratum 2527 copies. The ordinary planting system, distance between rows 2,5 m between trees in the rows – 0,75 m. The total number of ranks 32. The minimum number of trees in the first and the last rows and is 17 and 7 instances, respectively, while in others an average of 80. The most widely represented in the planting of trees with diameters 2, 3 and 4 cm. Their number in percentage terms is 20,42; 23,43 and 22,92 % respectively of the total number of trees in the plantation. The number of trees with diameter 1 cm is 11 %, 5 cm 13,02 %. Specimens with diameters of 6 and 7 cm is 6,25 and 2,41 % respectively. At least there are plants with a diameter of 8 cm – 0,55 %. The trees at the heights at planting divided by the four grades. The highest percentage has a height of 3.1–4.0 m – 51,54 %. Some smaller number are specimens with a height of 4.1–5,0 m. Their number is 26,36% of the total. In planting plants of a height of 2,1 m and 3,0 m are 17,49 %. The least amount consists of the panel with height of 1,1 m–2,0 m – 4,61 % of the total number of individuals. In the examined stand according to the established groups of heights identified the following classes of land capability: I class – 26,36 %, II class – 51,54 %, III – 17,49 %, IV – 4,61 %. There are two types of sprout plantings of this species: young small stumps and stumps of large size [4]. In the experimental section we have identified 123 red oak stumps with coppice shoots. The number of shoots of each cutting varied from 2 to 7, different values of their heights and diameters. An important indicator of plant growth is the amount of apical growth and the growth of side shoots. A feature of the forest vegetation of the Steppe is that of active growth processes they occur in young age. The magnitude of apical growth in a pure planting the red oak is for plants that reached a height of 3 m, up 78,2±6,0 cm, number of leaves on the growth – 24±1,12. According to A.K. Polyakov. P. Suslova for the conditions of Donetsk Botanical garden of NAS of Ukraine, apical growth for 18-year-old individuals is 60.5±4,6 cm. Blinkova A. I. believes that the culmination of current height increment in the woodlands at the oak overtakes in 8–15 years in pure stands. According to obtained data, the annual growth of the shoots has a value of 22.6±0,91 cm, number of leaves 11±0,25. According to V. A. Maiboroda, 10-year-old culture of red oak in the Forest-Steppe reach a height of 10.2 m in the D3 forest type (humid forest) at high density, the diameter is 4 cm for the low density plantings of a height and diameter have values of 8,8 m and 4,5 cm, respectively. Stock cultures 110 and 62 m³. When comparing the obtained results with the data. A. Maiboroda found that 10-year-old culture of the Steppe red oak have a lower height on average by 56,6 %, the diameter – 12,6 %. Is significantly reduced and the value of the stock. This difference is due to different forest growth conditions (high rainfall and different type of soils in Forest-steppe zone). Изучено основные таксационные показатели лесных культур дуба красного в условиях подзоны Северной Степи Украины. Рассчитано средний диаметр и высоту, определены продуктивность и приросты деревьев.
Authors and Affiliations
А. П. Криворучко A. P. Krivoruchko
Keywords
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