Мінливість довжини хвої сосни звичайно

Abstract

Проаналізовано існуючі методики щодо вивчення мінливості хвої. Наведено результати аналізу зразків одно- та дворічної хвої у пристиглих і стиглих соснових деревостанах, що ростуть у різних типах лісу ДП «Скрипаївське НДЛГ» та ДП «Зміївське ЛГ» Харківській області. Установлено, що індивідуальна мінливість хвої досліджуваних сосняків у різних типах лісу відповідає середньому рівню. Довжина хвої поточного року більша у багатших лісорослинних умовах, довжина дворічної хвої однакова

Проанализированы существующие методики по изучению изменчивости хвои. Приведены результаты анализа образцов одно- и двухлетней хвои в приспевающих и спелых сосновых древостоях, растущих в разных типах леса ГП «Скрипаевское УОЛХ», ГП «Змиевское ЛХ» Харьковской области. Установлено, что индивидуальная изменчивость хвои исследуемых сосняков в различных типах леса соответствует среднему уровню. Длина хвои текущего года больше в богатых лесорастительных условиях, длина хвои предыдущего года одинакова.

In the forest fund of Ukraine pine forests occupy about 2243 thousand ha, their stock is 349 mln. m3that is 37 % of the area and 35 % of their stock. Pine forests are characterized by an uneven age structure and the ripening and mature forest stands prevail over the area in their composition. The productivity of the forest stands in different regions of Ukraine is not the same. Taking into consideration the importance of carrying out ecological, protective, social and other useful functions of pine forest stands from the one side and the dependence of the execution level of these features upon the pine forests productivity, which varies in different regions of Ukraine, the issue of needles' variability investigation as one of the factors that influence the productivity of forest stands in the whole, is quite important. Biometric, morphological and anatomical characteristics of needles is an important identification sign of species that enables to evaluate the action level of different ecological factors which characterize the peculiarities of forest stands growth (Koba). The needles length of species of genus Pinus L. is considered to be one of the most variable signs. It depends on the height above sea level, the complex of soil and climatic conditions, precipitation, and it is connected with other ecological conditions (Kizeev, Koba, Mamaev, Pashkevich, 2007; Pravdin, Solomaha). The needles' length is an important indicator of trees condition and their reaction to the forest site conditions [Pashkevich, 2005; Tereschenko]. The object of the research: of Scots pine needles. The subject of the research: needles' length variability of Scots pine in Kharkiv region. Methods of the research: in Kharkiv region the samples of annual and biannual needles of Scots pine from in 3 plantations of ripening and mature age were analyzed. These plantations are the followings: Skrypaivske forestry of "Skrypaivske Training & Experimental Forest Economy" of Kharkov National Agrarian University named after V.V. Dokuchaev ("Skrypaivske TEFE") (realtively poor forest site conditions – В2), "Zadinetske forestry" (realtively poor forest site conditions – В2), and "Chemuzhivske forestry” (relatively fertile forest site condition – С3) of the "Zmiivske Forest Enterprise". In each spruce stand the branches with needles were taken from 30 trees Conclusions. According to he analysis of the needles' length from mature and overmature stands that grow in different forest types of Skrypaivske forestry of "Skrypaivske Training & Experimental Forest Economy" of Kharkov National Agrarian University named after V. V. Dokuchaev ("Skrypaivske TEFE") (realtively poor forest site conditions – В2), "Zadinetske forestry" (realtively poor forest site conditions – В2), and "Chemuzhivske forestry” (relatively fertile forest site condition – С3) of the "Zmiivske Forest Enterprise" their differences from each other was proved. Individual variability of pine needles corresponds to the average level. It was ascertained that in richer conditions of moist relatively fertile forest site condition – С3 (moist relatively rich linden-oak-pine forest type) the annual needles of pine are longer than from fresh realtively poor site conditions – B2 (fresh relatively poor oak-pine forest type).