Distribution of English Oak (Quercus robur L.) and Norway Maple (Acer platanoides L.) with Height in a Shelterbelt

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630*228.7

DOI:

10.37482/0536-1036-2020-6-111-119

Abstract

The organizing framework of adaptive landscape agriculture is protective afforestation. The study of the shelterbelt state is necessary for detection of their protective height due to the dramatically changing climatic conditions. The research purpose is to carry out the distribution of trees of English oak (Quercus robur L.) and Norway maple (Acer platanoides L.) with height for the stand structure evaluation, as well as to propose the measures for the condition improvement of English oak. The shelterbelt, the spatial structure of which was studied, is located in the vicinity of the village of Zolotarevka (65 km from the city of Lugansk). Archival data on the creation time and age of the studied forest shelterbelt were not revealed. Shelterbelts in the Lugansk region were created in accordance with the “Great Plan for the Transformation of Nature”, which was designed for 1949–1965. Sampling areas were laid out in accordance with the industrial standard OST 56-69–83. The composition of the shelterbelt, the diameter and average height of the trees were determined based on the results of enumerative valuation. The coefficients of skewness and kurtosis of stands of the studied species were calculated by the standard methods of biometrics. The distribution of Norway maple and English oak trees with height was checked with the normal distribution of trees in the plantation according to the Shapiro-Wilk test. The authors revealed that arithmetic and valuation mean heights of the stands of English oak and Norway maple on two permanent sampling areas differ slightly. It was found that the stand of Norway maple on the first and second sampling areas is characterized by positive right-side symmetry and positive kurtosis. Analyzing the stand condition, it is arguable that the coefficient of skewness of the English Oak stand on both areas is not the same in sign and numerical value: on the first sampling area – leftside negative (As = –2.026) and on the second – right-side positive (As = 0.973). The authors pay particular attention to the fact that the value of the coefficient of kurtosis of the English Oak stands is the highest on the first sampling area – 3.044. On the basis of the ShapiroWilk test it is shown that the curve of distribution of the Norway maple stands with height on the first and second sampling areas does not correspond to the normal distribution curve for the plantations. While the curve of distribution of the English Oak stands with height on the second sampling area is close to the indicator of the Shapiro-Wilk test for normal stands and is 0.823 (for p = 0.05, W = 0.842, n = 10).

Authors

O.V. Gribacheva¹, Candidate of Biology, Assoc. Prof., Head of the Department; ORCID: https://orcid.org/0000-0002-5428-143X
A.I. Chernodubov², Doctor of Agriculture, Prof.; ResearcherID: AAS-8110-2020, ORCID: https://orcid.org/0000-0001-9195-8895

Affiliation

¹Lugansk National Agrarian University, gorodok LNAU-1, Lugansk, 91008, Lugansk People’s Republic, Ukraine; e-mail: olesya_kopaneva_78@mail.ru
²Voronezh State University of Forestry named after G.F. Morozov, ul. Timiryazeva, 8, Voronezh, 394087, Russian Federation; e-mail: chernodubov2010@yandex.ru

Keywords

shelterbelt, Quercus robur L., Acer platanoides L., tree stand, average diameter, arithmetic mean height, valuation mean height, coefficient of skewness, coefficient of kurtosis, Shapiro-Wilk test

For citation

Gribacheva O.V., Chernodubov A.I. Distribution of English Oak (Quercus robur L.) and Norway Maple (Acer platanoides L.) with Height in a Shelterbelt. Lesnoy Zhurnal [Russian Forestry Journal], 2020, no. 6, pp. 111–119. DOI: 10.37482/0536-1036-2020-6-111-119

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Received on October 16, 2019