山西省油松人工林立地指数表的编制

Compilation of Site Index Table of Pinus Tabulaeformis Plantation in Shanxi Province

通过收集近40年山西省连清森林资源数据并结合实地调查,获取人工油松林数据,拟合优势木树高和平均树高的关系。按龄阶(组)分别统计林分平均年龄和优势木平均树高,利用理查德方程拟合导向曲线。以导向曲线为基础,确定基准年龄和指数级距,完成地位指数表的编制。并用落点法进行验证,结果表明,编制的山西省油松人工林立地指数表可以预测油松树高的生长趋势。

Through the collection of forest resources investigation data in Shanxi Province in recent 40 years and field investigation,the data of Pinus tabulaeformis plantation were obtained to fit the relationship between dominant tree height and average tree height.The average age of the stand and the average height of the dominant trees were counted according to the age class(group),and the Richard equation was used to fit the guide curve.The baseline age and index grade distance were determined based on the guidance curve,and the compilation of the site index table was completed.It was verified by the falling point method,which results showed that the site index table of Pinus tabulaeformis plantation in Shanxi Province could be used to predict the growth trend of Pinus tabulaeformis height.