Влияние метеорологических условий на рост культур ели с закрытой корневой системой

Abstract

The assessment results of the five- and seven-year-old European spruce crops growth in the Gryazovetsky district of the Vologda region, created by one- and two-year-old seedlings with a root-balled tree system with improved hereditary properties, are presented. It is noted that in the studied seven year-old crops, the proportion of spruce in the plantation composition reaches four points, and in five-year-old — from two to four points. Natural renewal of hardwoods due to timely clearing is located mainly in the inter-row spacings and, by now, does not depress cultivated plants. All the surveyed sites are characterized by a tendency to increase the annual growth of terminal shoot, as well as a decrease in the level of its fluctuation with age. The correlation ratio (η = 0,85) indicates a high dependence of the growth of the axial shoot on the year of its formation. It is shown that meteorological factors influence the growth of spruce crops created by seedlings with a root-balled tree system in the phase of their individual growth. The greatest influence is the sum of the active temperatures of the growing season, precipitation, relative humidity in May and June and the average air temperature in the daytime. At the same time, the growth of axial shoots increases with an increase in the number of days with precipitation in May, but decreases with their increase in June. A significant positive dependence of the increase was noted on the relative humidity of the air in May, however, increased humidity in June leads to a decrease in the growth of spruce crops.