Quantitative Analysis of Stand Structural Heterogeneity

Abstract

Abstract: The research of forest structure used to mainly focus on 1-dimensional diameter, height structure and 2-dimensional spatial distribution pattern, which ignored the 3-dimensional property of forest. The forest 3-dimensional structure model was used to research old-growth stand, primeval secondary stand and bristle tooth oak stand, which were selected from Jingouling Forest Farm and Jincang Forest Farm of Wangqing Forestry Bureau in Jilin province, and analysis was made on their spatial structure heterogeneity. The result revealed that: (1) the SCI indexes of old-growth forest, primeval secondary forest and bristle tooth oak forest are 4.03,3.16 and 2.74 respectively; (2) the vertical gradient and average patchtype number of old-growth forest,primeval secondary forest and bristle tooth oak forest are 7.67m, 12.60,6.58m, 10.97,5.36m and 8.13 respectively;(3) the diversity indexes of old-growth forest, primeval secondary forest and bristle tooth oak forest are 7.67m, 12.60,6.58m, 10.97,5.36m and 8.13 respectively. Forest 3-dimensional structure model can well reflect and evaluate stand structural heterogeneity. The structure of old-growth forest is most complex, then primeval secondary forest and bristle tooth oak forest.The 3-dimensional structural model can well reflect and analyse forest structural heterogeneity.

Key words: stand spatial structure, spatial distribution pattern, structural heterogeneity, 3-dimentional structure model, SCI index

CLC Number:

S718.5

LIU Fengqiang, ZHANG Huiru, JIANG Huiquan. Quantitative Analysis of Stand Structural Heterogeneity[J]. FOREST RESOURCES WANAGEMENT, 2010, (1): 33-38.

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