在人类关注的环境问题中,水域生物生态系统保护成为热门话题之一。人们为此采取营造水源林的对策,但对水域的保护性森林经营技术却缺乏经验。欧美北方林在这方面做了有益尝试,取得了一定的成绩。有的国家还专门制定了技术规程,以手册形式提供生产者使用。综观他们的做法,林业的贡 Among the environmental issues of concern to human beings, the protection of biological ecosystems in waters has become a hot topic. People have taken countermeasures to create water-source forests for this purpose, but they lack experience in protected forest management techniques. Northern Europe and the United States made a useful attempt in this area, and achieved some success. In some countries, technical regulations have been specially formulated to provide producers with manuals. Looking at their practices, forestry tribute