82 Principles of Plant Introduction 植物引种的原理 1. Theory of similarity in Climate气候相似论 P.53. 2. Conception of Ecological environment and ecological types p54. Ecological factors 生态因素 including climatic(T, Light, Water), Soil, Living organism factors Ecological environment生态环境 Ecological region 生态地区 Plant ecological type生态类型§2 Principles of Plant Introduction 植物引种的原理 1. Theory of Similarity in Climate 气候相似论 P. 53. 2. Conception of Ecological environment and ecological types p54. Ecological factors 生态因素 including climatic (T, Light, Water), Soil, Living organism factors Ecological environment 生态环境 Ecological region 生态地区 Plant ecological type 生态类型