当今,世界现代林业的发展趋势,是建立复合生态系统,把立地、环境、气象、乔木、灌木、草本植物、农副和动物等多种群、多层次、多效益的资源,作为相互联系、相互制约、相互影响的统一整体进行开发和研究。营林在这个系统中,占据主导地位,是复合生态系统的设计师和建造师,在空间位置上和时间顺序上,对全面经营、培育和扩大森林资源都具有重要作用。森林资源的内涵,应是复合生态系统内的全部资源并 Nowadays, the development trend of modern forestry in the world is to establish a complex ecological system that takes resources of multiple groups, multi-levels and multiple benefits including stand, environment, meteorology, trees, shrubs, herbs, agricultural and sideline animals and animals as the interrelated and mutually Constraints, the unity of the overall impact of mutual development and research. Forests are the dominant system in this system. They are the designers and builders of the composite ecosystem. They play an important role in the overall management, cultivation and expansion of forest resources in space and in time sequence. The connotation of forest resources should be all resources within the composite ecosystem