Особливості росту та формування штучних насаджень тополі чорної (Populus Nigra L.)
| Autor: | O. V. Kobets, N. Yu. Vysotska |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Forest inventory
geography.geographical_feature_category biology Range (biology) Steppe Forest management Edaphic Forestry biology.organism_classification Black poplar Geography Productivity (ecology) Yield (wine) lcsh:SD1-669.5 General Earth and Planetary Sciences тополя чорна математичні моделі таблиці ходу росту вік стиглості lcsh:Forestry General Environmental Science |
| Zdroj: | Науковий вісник НЛТУ України, Vol 29, Iss 1, Pp 20-23 (2019) |
| ISSN: | 2519-2477 1994-7836 |
| DOI: | 10.15421/40290103 |
| Popis: | The black poplar stands (Populus nigra L.) provide a range of ecological services and have an economic significance. Stands of ІХ and higher age classes are dominating. Therefore, it is necessary to systematize data on the productivity of black poplar in various natural and climatic zones of Ukraine. Yield tables are the basis for regulatory and reference data in forest management, accounting of forests and forest resources. Most of existing yield tables was developed primarily for normal stands. Such tables do not take into account regional characteristics of growth and state of forest plantations. The aim of the investigation is to determine the characteristics of the course of growth and productivity artificial modal black poplar stands in various natural and climatic zones of Ukraine. To determine the characteristics of growth and formation of modal stands and to develop yield tables, data of Forest inventory Database of Production Association "Ukrderzhlisproekt" were analyzed using conventional techniques. Yield tables for Populus nigra L. were constructed from 4650 plots. A significant differentiation in the dynamics of areas and stocks of poplar stands has been found by age classes in different natural and climatic zones and typological range. It was established that modal artificial stands black poplar grows in ІІ–ІІІ site class in the conditions of mesic mesotrophic (C2) and meso-hygric mesotrophic (C3) (in accordance with the Alekseev-Pogrebnyak edaphic grid). Forest yield at the age of 70 is reaching 435, 450 and 500 m3 ha-1 in the conditions of Steppe, Forest-Steppe and Polissya, respectively. The mathematical relationships accurately characterize the growth of artificial black poplar stands of conditions of mesic mesotrophic and meso-hygric mesotrophic, and the determination coefficients of the equations fluctuate between 0.90–0.99. By the ratio of mean and current annual increments in yield tables the age (30–35) of quantitative maturity of modal stands was identified. |
| Databáze: | OpenAIRE |
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