天然林保护依据的探讨

从森林生态环境价值的角度，说明了天然林的生态环境价值远大于其实物形态的经济价值，并大于人工林的生态环境价值；提出了建立森林生态环境补偿机制是实施天然林保护工程的保障，森林生态环境质量评价是实施天然林保护工程的一项基础工作，并构建出区域水土流失潜在风险评价的指标体系框架和评价方法。最后提出了确定天然林保护对象的三个因素即生态脆弱性，天然林保护目标和社会经济因素。

Preliminary Analyses on the Base of Natural Forest Production

Some important problems on natural forest protection are demonstrated in this paper. From the point of view of forest eco_environmental value, it has been illustrated that the eco_environmental value of the natural forest is far more than its economical value, and more than eco_environmental value of the artificial forest. It has been put forward that establishing the compensation mechanism of the forest eco_environmental value is to gurantee the implement of natural forest protection engineering, and the forest eco_environmental quality assessment is an impontant foundation for carrying out natural forest protction engineering. The indicator system framework and the method of the potential risk evaluation for water loss and soil erosion in zone have also been constructed. Finally, this article has put forward three factors to determine the protection object of natural forest, namely, ecological fragility, the purpose of natural forest protection as well as social and economical factors.