Research on the Growing Regularity of Natural Forests of Pinus Tabulaeformis Carr.in Guandi Mountain

In order to study the growth of natural forests of Pinus tabulaeformis Carr. in different site conditions in the forest zone of Guandi Mountains, and to probe into their growing regularity, and further to provide strong theoretical proof for managing forests in large area and improving the productivity of the forests of Pinus tabulaeformis Carr., and through choosing dominant trees by setting up sample-plots in the forest zone of Guandi Mountain to make stem analysis, this paper analyzes on and probes into the growing regularity of the height, breast diameter and volume of the Pinus tabulaeformis Carr. in different site conditions, the result indicates that the different site conditions have obvious influences on the growth of natural forests of Pinus tabulaeformis Carr.