论文部分内容阅读
采用红松基准上层高及环境因子地形、地貌、土壤、气候、地理、立地条件等为区划指标，通过建立地理信息系统和应用主成分分析、有约束条件的二维逐步聚类方法，实现了以乡（林场）为区划单元的生态区划。采用定性与定量相结合的数量化非线性模型，提出了任意地点立地质量评价及造林地选择方法。
Based on the index of Korean pine and topographical factors of topography, topography, soil, climate, geography, and site conditions, the index of zoning was established through the establishment of geographic information system and the application of principal component analysis and constrained two-dimensional stepwise clustering. To township (forest farm) for the division of ecological zoning unit. The qualitative and quantitative quantitative nonlinear model was used to evaluate the site quality of any place and the selection method of afforestation site.