1986年10月21—25日,中国植物学会在浙江省杭州市召开了珍、稀、濒危植物保护研究学术会议。会议强调,植物是人类生存,物质文明和精神文明的基础。由于人类经济活动的影响,在温带地区大约有10％的植物受到不同程度的威胁,其中我国有3000余种,欧洲1800余种,美国有3,000余种。在热带地区,由于大量森林的砍伐,估计有60,000种植物在我们这一代的时期内灭绝。植物资源破坏,带来自然环境恶化,目前世界上每年被侵蚀的土壤250亿 From October 21 to October 25, 1986, the Chinese Society of Botany held a conference on the research on the conservation of rare, rare and endangered plants in Hangzhou, Zhejiang Province. The meeting stressed that plants are the basis of human existence, material civilization and spiritual civilization. About 10% of the plants in the temperate zone are threatened to varying degrees due to the economic activities of human beings, of which over 3,000 are in China, 1,800 in Europe and more than 3,000 in the United States. In the tropics, an estimated 60,000 species of plants are extinct during the period of our generation due to the deforestation of large numbers of forests. The destruction of plant resources, resulting in deterioration of the natural environment, the current annual erosion of the earth 25 billion