RUSSIAN JOURNAL OF FOREST SCIENCE, 2021, No. 5, P. 494–508


VARIABILITY OF VEGETATIVE ORGAN CHARACTERISTICS OF DAHURIAN LARCH IN ZABAYKALSKY REGION
V. P. Makarov, O. F. Malykh, T. V. Zhelibo
Institute of Natural Resources, Ecology and Cryology, Siberian Branch of the RAS
Nedorezova st. 16a, Chita, 672014, Russia
E-mail: vm2853@mail.ru


Received 22 October 2020
The article summarizes for the first time the results of a study of the morphological organs variability in 38 populations of Dahurian larch (Larix gmelinii (Rupr.) Rupr.) in various natural conditions of the Zabaykalsky Region. There are also presented the characteristics of the trunk, crown, needles and seed production intensity. The correlation was found among the different features, as well as between the features and environmental conditions. The stands were distinguished, possessing important selection traits and properties that may prove economically useful.
It was found that the variability of the trunk straightness in a number of larch populations reaches a very high level. The value of the trait is statistically reliably related to the steepness and exposure of the slope, the hydrotope type, as well as the altitude and geographic coordinates of the habitat. The variability of the crown width in relation to the height of the trunk is can vary highly, from very low to high levels. A correlation was also found between the trait and geographic longitude and hydrotope type. The crown width also varies considerably, which is reliably correlated with geographical coordinates and altitude, as well as with the ecological conditions of the habitat – the steepness and exposure of the slope, and the type of hydrotope. The average values of the branching angle in populations are in the range of 60–90 °. Trees with obtuse branching angles are rare. The trait significantly correlates with the geographic and ecological parameters of the habitat. It was found that the number of needles in the bundle correlates with the geographical coordinates and altitude, as well as the ecological conditions of the habitat. The length of the needles is correlated with the geographical latitude, however the correlation of the trait with the ecological conditions of the habitat has not been established. The seed production intensity has a close correlation with the geographical latitude, altitude, and hydrotope type. Individual variability of the trait occurs on an increased level. The article also presents the results of the correlation analysis of the morphological traits of the Dahurian larch.
Keywords: Dahurian larch, morphological diversity, traits correlation, environment
DOI: 10.31857/S0024114821050119


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