Reduction numbers and diameter increase of Scots pine (Pinus sylvestris L.) in the Maykop city conditions
УДК 630.519
DOI: 10.34736/FNC.2024.125.2.002.16-21
Svetlana G. Biganova, Cand. Sci. (Agr.), Associate Professor, ORCID: 0000-0002-0581-3612
Yuri I. Sukhorukikh, e-mail: drsuchor@rambler.ru, Dr. Sci. (Agr.), Professor, ORCID: 0000-0001-5073-6102
Lyubov A. Kolesova, Master Student
Ekaterina О. Kiyashkina, Post-Graduate
Maykop State Technological University, e-mail: info@mkgtu.ru, 385000, Pervomajskaya st., build. 191, Maykop city, Russia
Abstract. The study of the reduction numbers changes regularity of trunk diameters and the width of annual rings in Scots pine (Pinus sylvestris L.) makes it possible to solve economic and scientific problems. The aim of the research was to establish the values of reduction numbers and the width of annual rings during the growth period of Scots pine in an artificial forest on the Maikop city outskirts in the Republic of Adygea. Such studies for that species are being carried out for the first time in the region. 100 individuals of the species were studied. Taxation indicators were determined by generally accepted methods. Statistical data processing was performed using the Stadia 8.0 software for Windows, graphical data processing was performed using the Excel software. The reduction numbers were determined using the Schiffel method and newly calculated models. The reduction numbers determined by the Schiffel method had no statistical difference from the classical ones (F = 0.0119, significance = 0.989) and varied in parallel (Tparallelism = 0.504, significance = 0.6255). There was also a high statistical relationship between them (r = 0.9882, significance = 4.558E-6). For individual ranks, the differences were significant (rank 0 – 22.66, rank 20 – 6.49, rank 30 – 5.34, rank 100 – 5.64 %). Based on the calculated models, new reduction numbers values of diameters in the studied conditions are determined. The size of pine trees annual rings in the Maykop city conditions tended to decrease with age. It was adequately approximated by an exponential function (R2 = 0.83). The results obtained can be used to develop recommendations for the pine plantings formation and to assess the impact of external conditions on woody vegetation.
Keywords: forest plantations, annual rings, tree height, bonitet, statistical distribution, correlation
Funding. The work was carried out within the framework of the Maykop State Technological University «Monitoring of the engineering and biological structures condition and development to prevent environmental degradation» topic. Reg. no. AAAAA -А20-120122590046-8.
Citation. Biganova S. G., Sukhorukikh Yu. I., Kolesova L. А., Kiyashkina Е. О. Reduction Numbers and Diameter Increase of Scots Pine (Pinus Sylvestris L.) in the Maykop City Conditions. Scientific Agronomy Journal. 2024;2(125):16-21. DOI: 10.34736/FNC.2024.125.2.002.16-21
