针对上思县森林分布及其生长情况，选取林地土壤厚度、海拔高、坡度、坡向、坡位、石砾含量、交通区位等7项因子作为林地质量评定因子，采用数量化理论I模型方法对林地质量进行评定。分析了林地质量各个等级的空间分布，得出了林地质量评定结果较符合实际，可以满足编制林地保护利用规划要求，并为今后林地小班选择造林树种提供了依据的结论。%In order to prepare the forest land protection and utilization planning for Shangsi County in Guangxi province, woodland in small classes in this region were conduted one by one for quality grading assessment. According to the forest distribution and growth performance, 7 indices were selected as the factors for the woodland rating factors including thickness of the soil, altitude, slope, aspect, slope position, gravel content, traffic location, taking the quantification theory I as the modeling tool. Results of the study tally well with the actual situation, and thus meet well the requirement for the preparation of forest protection and utilization planning and provide theoretical basis for the selection of reforestation species.
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