Features of the development of standards for assessing the commodity structure of overmature two-layer beech forest stands
DOI:
https://doi.org/10.31548/forest2019.04.043Abstract
Modern researches of mensuration structure, assortment and commodity structure of forest stands of different wood species and age groups show certain specific features which do not correspond to the laws, which are modeled in the current assortment and commodity tables. And this applies in the first place to beech stands as the main forest-forming tree species of the Ukrainian Carpathians. Therefore, the development of appropriate regulatory information materials, that would account for the regional and age peculiarities of growth and product structure of overmature beech stands is relevant.
It was the first time that the structure of two-layer stands was modeled for the subsequent development of product tables. For this purpose, first there were modeled the theoretical lists of tree distribution and the second layer (has lower variance of trees by diameter compared to the first layer), and then the distribution of trees by diameter classes of the stand’s 1st layer was determined as the difference between the combined list and 2nd layer distribution.
It is determined that the main feature of the development of precise standards for assessing the commodity structure of two-layer stands is the need for their subsequent recalculation in connection with the displacement of the average diameter of layers (by 16–24 cm) compared to the total average diameter of the stand (for example, if the average diameter of a stand is 32 cm, then the average diameter of the 1st layer is 52 cm and the average diameter of the 2nd layer is 16 cm).
This offset has a rather complex relationship with the structure of the distribution of growing stock, since the stock of the corresponding categories of quality of stands, expressed in terms of volume of trees, is a cubic quantity that changes faster than the change in the mean diameter, which in turn depends on the square of the sum of trees’ cross sections in the stand.
Keywords: over-mature stands, two-layer plantations, commodity tables, statistical analysis, systematic errors.
References
Bala, O. P., Terentiev, A. Yu., & Vasylyshyn, R. D. (2011). Comparative characteristic of stands indicators of modal beech stands in Carpathian region of Ukraine. Scientific reports of NULES of Ukraine, 6 (28). Retrieved from http://www.nbuv.gov.ua/e-journals/Nd/2011_6/11bop.pdf [in Ukrainian].
Gaychuk, S., & Girs, O. (2012). Dimensional-Qualitative structure beech trees of Overmature Beech Forest Stands of the Ukrainian Carpathian Mountains. Scientific Bulletin of NULES of Ukraine, 173 (3), 16-23 [in Ukrainian].
Gaychuk, S., & Girs, O. (2015). Taxation structures in diameter of uneven-aged of Overmature Beech Forest Stands of the Ukrainian Carpathian Mountains. Scientific Bulletin of NULES of Ukraine, 216 (1), 44-50 [in Ukrainian].
Girs, О. (2011). Ripeness of forest stands and the use of arboreal resources in the forests of different purpose. Korsun-Shevchenkivskyi: FOP Maydachenko I. S. [in Ukrainian].
Kashpor, S. (2013). Forest inventory handbook. Kyiv [in Ukrainian].
Nikitin, K. E., & Shvidenko, A. Z. (1978). Methods and techniques for processing forest information. Moscow: Forestry industry [in Russian].
Nikitin, К., & Schvidenko, А. (1972). Еvaluation of cutting areas on computers. Kyiv.
Shvidenko, A. (Ed.). (1987). Normative and reference materials for the forest inventory of Ukraine and Moldova. Kiev, 560 [in Russian].
Svalov, N. N. (1983). The main provisions of the methodology for modeling tree stand productivity. Scientific bulletin of Lithuanian Academy of Agriculture, 38-40 [in Russian].
Zöhrer, F. (1972). The beta-distributions for best fit of stem-diameter-distributions. In UFRO 3 Conf. Gr. Consult statist forest (pp. 91-104). Paris.
Downloads
Published
Issue
Section
License
Relationship between right holders and users shall be governed by the terms of the license Creative Commons Attribution – non-commercial – Distribution On Same Conditions 4.0 international (CC BY-NC-SA 4.0):https://creativecommons.org/licenses/by-nc-sa/4.0/deed.uk
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
