小兴安岭针阔混交天然次生林主要树种NSC变异来源分析.

In order to explore the variation characteristics of the non-structural carbohydrate concentration of dominant tree species in the coniferous and broad-leaved natural secondary forest in the Xiaoxing’an Mountains with tree species, organs and thinning intensity, and to understand the distribution pattern, growth status, adaptation strategies and recovery potential of the NSC after the forest belt thinning, the coniferous and broad-leaved natural secondary forest in the mixed natural secondary forest with 6 kinds of thinning intensity(0%, 15%, 20%, 25%, 30%, 35%), select 5 main tree species, collect tree branches, trunks and leaves, and determine their soluble sugar and starch concentration, analyze the variation characteristics of NSC components with tree species, organs and thinning intensity. The results showed that there were significant differences in the concentration of soluble sugar, starch and total NSC among different tree species. All NSC components have high variation in different tree species. The coefficients of variation of the NSC components of Picea asperata, Acermono, Acer tegmentosum and Pinus koraiensis were all greater than 30%, and the highest was 88%. There were significant differences in NSC concentration among different organs. Among them, the concentration of soluble sugar was the highest in the leaves and the lowest in the trunk. The concentration of starch and total NSC was the highest in the trunk and the lowest in the branches. The various components of NSC had low variation in different organs, all of which were less than 35%. The intensity of thinning also had a significant effect on each NSC component. All NSC components had high variation in different. [ABSTRACT FROM AUTHOR]