日本最近的林业经营基本方针是提高产量、加强培育速生林和改进造林技术。为了提高人工造林的质量,首先必须培育优良的苗木,而苗木必须选择能适合造林地的气候、土壤等环境条件。因此,苗木的鉴别和培育巳成为重要的技术问题。但是目前日本的苗圃生产和苗木栽植后的生长情况却还未能完全合乎要求。因此,日本农林省林业研究所认为,对于选苗的 The basic principle of Japan’s forestry management is to increase production, strengthen the cultivation of fast-growing forests and improve afforestation techniques. In order to improve the quality of afforestation, we must first cultivate fine seedlings, and seedlings must choose suitable climatic conditions, soil and other environmental conditions. Therefore, the identification and cultivation of seedlings has become an important technical issue. However, at present, the growth of nursery production and seedling cultivation in Japan has not yet fully met the requirements. Therefore, Japan’s Agriculture, Forestry and Forestry Research Institute believes that the election of seedlings