一、从永续收获到持续发展传统的永续收获观点认为,林业是按照这样一种方式进行经营的,即未来潜在采伐量绝不会低于实际的采伐量水平。这并非是一种进取的林业发展战略。首先,它只考虑到材积收获的数量,而未考虑到森林收获过程中质量和价值这两个重要特征。其次,以永续收获为基础的经营只能以低收获量水平进行。例如,天然林生态系统在其进入成熟 First, from perpetual harvesting to sustainable development Traditionally, the sustainable harvesting view holds that forestry is managed in such a way that the future potential harvest will never fall below the actual harvesting level. This is not an aggressive forestry development strategy. First, it takes into account only the amount of volume harvested but does not take into account the two important characteristics of quality and value in the harvest of forests. Second, operations based on perpetual harvest can only be conducted at low harvest levels. For example, natural forest ecosystems mature at their entry