Ecological classification of avian mating system 鸟类婚配制度的生态学分类
2.
The common defect of this system is that the land ecological characteristic do n ' t include in the system . s . o we want to establish the land ecological classification system according to the theory and principle of land classification and the land classification system in germany 因此，依据土地分类的基本原理、原则等，借鉴德国土地分类较为成功的作法，为了加强对土地生态系统的开发利用，我们尝试性地建立了土地生态分类系统。
