ВПЛИВ МЕТОДУ СТВОРЕННЯ НАСАДЖЕНЬ ДУБА ЗВИЧАЙНОГО (QUERCUS ROBUR L.) НА ЇХНЮ ПРОДУКТИВНІСТЬ В УМОВАХ СВІЖОЇ ГРАБОВОЇ ДІБРОВИ ПРАВОБЕРЕЖНОГО ЛІСОСТЕПУ УКРАЇНИ

Autor: V. S. Kuzovych, O. S. Ostapchuk, O. V. Sovakov
Rok vydání: 2018
Předmět:
Zdroj: Науковий вісник НЛТУ України, Vol 28, Iss 2, Pp 59-63 (2018)
ISSN: 2519-2477
1994-7836
DOI: 10.15421/40280210
Popis: The methods of creation forest stands are the sets of techniques for the formation of artificial stands, the main of which are sowing and planting. The purpose of the research is determined by the definition of the productivity of artificial oak stands in the D2 condition of oak forest according to the method of their creation. The task of the study was to establish a number of test areas and determine the silvicultural and forest stands parameters of uneven-aged oak stands at the age of 10–68 years which were created by the method of planting the seedlings and sowing the acorn in areas of fresh logging areas. General laboratory selection of forest stands and their review in nature was conducted during the research. The establishment of test areas and the determination of forest stands parameters were carried out in accordance with generally accepted methods in forestry mensuration and forestry. It was determined that in stands created by sowing oak acorns in all classes of age the oak seedlings had a higher height. It was found out that the oak trees are cleaned from knots and branches, have more full-tree trunks. Oak stands created by sowing in the ІІ – VІІ age classes have 6–19 % higher average height of the main stand. Comparing the dependence of the diameter of oak trees to the method of creation, we found that till the age of 35–40 the average diameter of oak trees was bigger than in the stands created by planting seedlings. There is no significant divergence in the diameter after this age. Unlike the average diameter, the difference in oak stock volumes under different methods of creation is found on all studied areas. Meanwhile, there is no significant difference between stock volumes of 10–20-year-old stands. With the increase of the age of stands, the difference in stock volume between oak stands created by sowing acorns and planting seedling increases. The research determined that the average stock volume of oak trees at the age of 10–68 years was 118 m3·ha-1 under the condition of sowing acorns and 71 m3·ha-1 – of planting seedlings, which is 48 m3·ha-1 (39 %) less. Regarding the overall productivity of oak stands, it was found that the average total stock volume of stands was 158 m3·ha-1 when sowing acorns and 131 m3·ha-1 when planting seedlings which is 27 m3·ha-1 less (17 %). By means of the study of 10–68-year-old artificial stands it was found that the method of creation significantly influences the forest stands parameters, condition, quality and, ultimately, the productivity of oak stands. The change of the average diameter by age of oak stands, depending on the method of creation, makes it possible to argue that in the oak stands at the age of 10–68 years the differences in tree diameter were not detected and the method of creation does not affect this forest stands parameters. The age-related change in the volume stock of oak trees planted by sowing acorns and planting seedlings indicates on more intense growth of oak stands created by sowing acorns. Comparing the overall productivity of mixed oak stands, it is determined that it has a logarithmic dependence on the method of creating stands. The overall productivity of oak stands is influenced by the average height and diameter of the oak trees, their conservation in the stand, the stock volume of the oak trees. Based on the principles of ecologically oriented forestry in fresh hornbeam oak forests on bare logging areas, we recommend creating young forests by sowing acorns.
Databáze: OpenAIRE
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