INVESTIGATION OF THE RELATIONSHIP BETWEEN BIOMETRIC PARAMETERS OF SCOTS PINE JUVENILE SEEDLINGS FROM CONDITIONED SEEDS WHEN ASSESSING THE RESULTS OF REFORESTATION

Abstract

It is necessary to know the degree of relationship between the biometric parameters of Scots pine juvenile trees grown from conditioned seeds to assess the results of reforestation and the full use of the above algorithms and the development of new ones. Descriptive statistics were calculated for direct and indirect measurements of the biometric characteristics of single Scots pine trees (container-grown 1 + 0.2017 fall plants, seed spectrometric separation) grown from conditioned seeds on a linear plot of the experimental area (51. 49 '45.605200 "; 39. 20 '33.046700"). Direct measurements of the height and diameter of the root collar of seedlings were carried out directly in the field. Indirect Image J-measurements of the biometric parameters of seedlings were carried out on the basis of low-altitude photographs in plan, obtained from a camera mounted on an unmanned aerial vehicle with a four-rotor aerodynamic scheme. Pearson correlation tests were used to quantify the correlation between young tree height with root collar diameter and crown area. Biometric parameters were as follows: seedling height - 53.9 ± 16.2 cm (mean ± standard deviation); diameter of the root collar - 7.7 ± 2.9 mm; endurance coefficient - 73.8 ± 17.8; crown area - (229.111 ± 139.494) ×103 mm2. The height and diameter of the root collar of the seedling strongly positively correlated with each other (r = 0.807 at the p = 0.01 significance level) and with the crown area (r = 0.830 and 0.875, respectively, at the p = 0.01 significance level). The endurance coefficient had an inverse correlation with the diameter of the root collar (r = -0.621 at the significance level of p = 0.01), crown area (r = -0.407 at the significance level p = 0.01) and had no correlation with seedling height.