(1) Although present annual amount of growing stock is increasing, annual amount of growing stock in whole region changes in a big margin, which is effected by some factors.

(2) To do research on China's growing stock market and to understand the rule of it are of great theoretical and practical meanings.

(3) Forest growing stock of forest resources is an important component of the survey, the traditional survey of forest resources is a long task, labor intensive, and require a lot of funding for the work.

(4) Based on site classification and projecting site index tables and quantized site index tables for China fir Masson's pine, growing stock per ha, was used to be a evalution index on site quality.

(5) There are in total 151 state-owned forest farms in Guangxi now, whose forest area covers 9% of Guangxi's total forest area and their growing stock volume accounts for 16%.

(6) The research results showed:the mean height, DBH, the individual volume and the growing stock increased distinctly with the increasing of stand ages.

(7) Site level in Hexi-corridor area was divided into 4 types by comprehensive analyzing the growing stock of stand and soil productivity of all kinds of farmland shelterbelt.