甘肃省天然林区森林资源蓄积量及用材林消长变化

The Volume of Forest Resources and Timber Dynamic Changes of Timber Forest of Natural Forest Region in Gansu Province

通过对甘肃省天然林区5次森林资源连续清查蓄积量及用材林蓄积量变化的分析,初步得出结论:1979～1988年甘肃省天然林区蓄积量为增长阶段,1988～1996年蓄积量属减少阶段,1996～2001年为增长阶段。通过对3个阶段的分析,说明甘肃省20多年来,天然林区蓄积量呈波浪式的增长、减少、再增长趋势,也充分说明了国家实施天保工程的正确性。

Through the dynamic changes analysis of forest resourees and volume of timber forest for five times continual forest inventory of natural forest region in Gansu province, the conclusion is drawn as follows: the volume increased from the year 1979～1988, and decreased from 1988～1996, but later regained it's increase from 1996～2001. The analysis of the three stages demonstrates that the volume of natural forest follows an 'increase-decrease-increase' trend over the last 20 years, which fully indicates that it is rational for the government to implement 'Logging-ban'.