Trends in radial growth of Scott pine trees in geographical crops

Abstract

The purpose of the research is to identify trends in the change in radial growth, the width and structure of annual rings in forest-steppe and steppe pine ecotypes in 59-61-year-old geographical cultures. To achieve the intended goal, according to the methodology adopted in forest inventory, 32 trial plots were laid, on which the diameter of trees at a height of 1.3 m with an accuracy of 0.1 cm and the height with a Blume-Leiss altimeter with an accuracy of 0.1 m were measured with a measuring fork. area (PP) from 3 trees of average diameter and height, radial wood cores were taken with a Haglof-60 age borer at a height of 1.3 m. After dating the growth rings of wood, their width was measured at the Lintab-6 complex, divided into early and late. The obtained data were statistically processed using the programs Statistica 8.2 and Excel-10. In the forest-steppe and steppe ecotypes, the trends of radial growth were determined and their features with age were revealed. So, up to 10 years it increases, then sharply decreases and after 20 years it stabilizes.