AGE STRUCTURE AND COMPOSITION OF HIGH PRODUCTIVE PINE FORESTS IN PRIBAYKALIE
A. L. Grebenyuk1, A. G. Matveeva2
1Bratsk State University, Bratsk, Russian Federation
2Pacific State University, Khabarovsk, Russian Federation
Keywords: Pinus sylvestris L, first class of productivity (bonitet), age structure of tree stands
Abstract
The article presents the results of the study of the age structure of high-productive pine stands in Pribaykalie. The structure of forest stands by area, timber stocks, age, species composition and other characteristics is analyzed. An attempt is made to identify patterns in the distribution of the age structure of forest stands in sections with different forest inventory formulas. The establishment of these patterns and common features can be used in economic activities, as well as for solving forest restoration issues. Determining the relationship between tree species and their age structure in specific areas allows us to distinguish simple stands with one storey in height and complex stands with two or more storeys. The age character of a forest stand establishes a certain set of trees that form homogeneity in the age and biological development of the stand, which predetermines its economic importance in organizing forestry. The studies have shown that the intra-population structure of the stands has two predominant species, belonging to the pine (Scots pine ( Pinus sylvestris L.)) and aspen (common aspen ( Populus tremula L.)) economic parts. In relation to these economic parts, an analysis of the age character of the forest stand of the predominant pine economic part is given, which grows in the lingonberry, forb, green moss, alder and nettle groups of forest types. Pine stands of the first quality class are defined as even-aged and uneven-aged. Simple even-aged stands are characterized as pure and absolutely even-aged, as well as even-aged with the inclusion of accompanying species, having in the composition less than one in the reserve of the allotment. Among complex multi-storey stands, relatively even-aged stands located within the same age class, absolutely uneven-aged, relatively uneven-aged with an age spread of up to sixty years stand out. Intermediate types of age structures are characterized by stepped-uneven-aged forest generations.
|
