基于林分状态分析的蒙古栎林分质量评价

Evaluation of Forest Quality of Quercus mongolica Based on Stand Status Analysis

【目的】通过林分状态分析法对抚远地区蒙古栎林进行林分质量评价,为抚远地区蒙古栎林的森林经营及森林质量的提升提供理论科学依据。【方法】在抚远大峰山设置三块固定样地,利用固定样地内每木定位调查数据和分析统计软件,基于林分状态法对不同海拔高度的蒙古栎林分质量进行分析评价,同时对不同样地的土壤进行理化性质分析,了解林分状态与土壤基础理化性质之间的关系,根据评价结果进行经营措施优先性选择。【结果】样地1林分质量极差(ω=0.20),林分水平结构和年龄结构2个指标不合理;样地2林分质量较差(ω=0.29),年龄结构、树种多样性和顶级种竞争不合理;样地3林分质量处于中等(ω=0.49),顶级种竞争不合理。三块固定样地土壤含水量较大的林分质量较好,土壤全氮与林分状态值呈正相关,土壤全碳与林分状态值也呈正相关,全磷在三块样地中差异不明显。【结论】抚远大峰山三块蒙古栎林分质量总体一般,可进行经营措施优先性选择,从而提高林分的质量。在一定范围值内土壤碳、氮含量越高,蒙古栎林分质量越好,林分质量与土壤理化性质存在一定关联性。

【Objective】The forest quality of Quercus mongolica forest in Fuyuan was evaluated by stand status analysis,which provided theoretical and scientific basis for forest management and forest quality improvement in Fuyuan.【Method】Three fixed sample plots were set up in Dafeng Mountain,Fuyuan,and the forest quality of Quercus mongolica at different altitudes were analyzed and evaluated based on the stand status,and the relationship between soil physical and chemical properties and forest quality was analyzed,and the priority of management measures was selected.【Method】Three fixed sample plots were set up in Dafeng Mountain and the forest quality of Quercus mongolica at different altitudes were analyzed and evaluated based on the stand status,and the relationship between soil physical and chemical properties and forest quality was analyzed,and the priority of management measures was selected.【Result】The forest quality of sample plot 1 was extremely poor(ω=0.20),and two indexes of stand horizontal structure and age structure were unreasonable.Sample plot 2 has poor forest quality(ω=0.29),and the age structure,tree species diversity and top species competition are unreasonable.The forest quality of sample plot 3 is medium(ω=0.49),and the competition of top species is unreasonable.Forest quality,which has higher soil water content in three fixed sample plots,is better.There is a positive correlation between soil total nitrogen and stand state value,and there is also a positive correlation between soil total carbon and stand state value.There is no obvious difference in total phosphorus among the three sample plots.【Conclusion】The forest quality in the three sample plots of Dafeng Mountain in Fuyuan is generally average,so the priority of management measures can be selected to improve the stand quality.The higher the soil carbon and nitrogen content,the better the forest quality of Quercus mongolica,and there is a certain correlation between the forest quality and soil physical and chemical properties.