Ключевые слова: сосновые древостои; радиальный прирост; климатические факторы; дендроклиматология.
The paper presents the results of dendroclimatic research of the annual rings of Scots pine (Pinus sylvestris L.), growing under dry forest growing conditions of the Kazakh upland. The authors discuss the main causes of the climatic dependence of the seasonal variability of the radial growth of pine trees. It was found that the climate signal of temperature and the least degree of precipitation have the greatest influence on the width of an annual ring. The first half of the growing season completely determines the width of the annual ring, and the main climatic factor, significantly affecting the width of the annual ring of pine growing in the dry conditions of Northern Kazakhstan, is the temperature in May and June. Hot May and June negatively affect the radial growth of Scots pine, and precipitation, on the contrary, contribute to the formation of wider annual rings. In this case, the main contribution to the variability of the width of the annual ring is made precisely by the air temperature. A close relationship was found between the June rainfall and the annual growth of pine under the dry conditions of Northern Kazakhstan, but over the past 10 years, there has been a sharp decrease in the effect of June rainfall on the radial growth of pine. There is a general tendency to increase the influence of temperature and a decrease in the effect of precipitation at the end of the growing season of the previous year (July-August) over the past 10-15 years.
Keywords: pine stands; radial growth; climatic factors; dendroclimatology.