适地适树是杉木速生丰产的基础。近年来我省丘陵区改地适树取得了一定成效。但在广大山区,山多人少,改地适树是受到客观限制的,况且改地适树仅能改变土壤条件,不能改变气候条件,在半山区、山区的土壤又较丘陵区肥沃,更适合杉木生长。我县四个林场均地处海拔800 Appropriate tree is fir fast growing basis. In recent years, the hilly area in our province to adapt to tree has achieved some success. However, in the vast mountainous areas, there are few people in the mountains and trees, and changing trees is subject to objective restrictions. In addition, adapting to changing trees can only change the soil conditions and can not change the climate conditions. In the semi-mountainous areas, the soil in the mountainous areas is more fertile than the hilly areas Suitable for fir growth. Four counties in our county are located at an altitude of 800