Objective Analyzing the development stages and stand structure characteristics of the hard broad-leaved forest in Maor mountain, through reasonable management measures to accelerate the positive succession of secondary forest development, and also providing scientific basis for the growth prediction and multifunctional sustainable management of natural secondary forests.
Method Taking the natural hard broad-leaved forest of Maor mountain experimental forest farm in Heilongjiang Province as the research object, using TWINSPAN bidirectional indicator species analysis method, interspecific linkage cluster analysis method, and discriminant analysis method to divide the development stages of hard broad-leaved forests; selecting different forest stand indicators from three aspects: age structure, diameter structure, tree species diversity, and analyzing the structural characteristics of forest stands at different developmental stages; and 11 parameters, including forest stability, target tree species diversity index and simpson diversity index, were combined through the entropy weight method-AHP method, constructing a comprehensive evaluation index to divide the development stages.
Result The research results show that the development process of the natural hard broad-leaved forest in Maor Mountain can be divided into group establishment stage, competition growth stage and near natural forest stage. At different stages, the age structure shows an increasing pattern, while the diameter structure generally shows an anti J-shaped pattern and the species composition is rich and relatively stable.
Conclusion The TWINSPAN classification method can effectively divide the developmental stages of natural hard broad-leaved forests in Maor Mountain, and reveal the characteristics of their age structure, diameter structure, and species diversity at different stages. It provides a reference for the study area to formulate more targeted management measures.
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