基于立地条件的森林生产力估算模型与适宜性研究

以广西省宁明县马尾松和桉树为例,利用高分辨率DEM提取研究区地形因子,综合考虑包括地形因子和土壤因子在内的立地条件和树龄,建立森林生产力估算模型,并生成区域潜在森林生产力分布图。研究结果显示:用基于DEM提取的地形因子数据进行森林生产力估算建模,能降低成本,有效提高建模效率;确定树木生长最优树龄后,仅利用立地条件因子就可以建立森林的潜在生产力模型,而两树种建模所需的立地条件因子各有不同;从生成的潜在生产力分布图可得看出宁明县的北部与东部均适宜林木生长,在中部发展林业的条件则相对较差,南部比较适宜种植马尾松,西部适宜桉树地种植。

The Estimation Model of Forest Productivity and Forest Suitability Based on Site Condition

Site condition calculated by DEM and tree age was applied to build estimation models of different forest species＇ productivity and distribution of potential forest productivity in Ningming County was generated, in which Pinus massoniana Lamb. and Eucalyptus were taken as examples. The results showed that：Established model with site condition calculated by DEM will reduce labor cost and increase efficiency ; It＇ s reasonable and feasible to establish forest productivity model with site condition factors while optimal growth age （OGA） was fixed, and different site condition factors were chose to establish model depending on the forest species;Poten- tial forest productivity was produced, which finds that north and east of Ningming County are suitable for plant- ing forest, while midland holds poor condition for developing forestry, moreover, south was suitable for Pinus rnassoniana Lamb. planting while west for Eucalyptus.