广西苍梧县山脊防火线立地分类及其立地质量评价

Site Classification and Quality Evaluation of Fire Proof Belt of Ridge of Cangwu County, Guangxi Province

通过对山脊防火线立地因子和生物产量因子的调查 ,采用逐步回归分析法筛选出影响山脊防火线内生物产量的主导因子为 :海拔、土层厚度、石砾含量、坡位 ;建立生物产量数学模型 ,利用模型生物产量将立地类型归并成三大类型组 ,并进行质量评价 。

Based on survey of site factors and biological productivity of fire proof belt of ridge of Cangwu county, Guangxi province, the dominant factors affecting the biological productivity were screened by progressive regression analysis, and the mathematical model of biological productivity was constructed. The results showed that the dominant factors affecting the biological productivity of fireproof belt of ridge were elevation, soil thickness, content of stone and slope position. The sites were incorporated into three groups according to the mathematical model constructed, and the qualities of the sites were evaluated as well. The research provided a basis for tree species selection of fireproof belt of ridge.