云南和广东,是我国具有较大面积热带和南亚热带环境条件的两个重要省份。它们之间,有着许多共同之处。因此,树种交流,互相引种驯化,对发展我国南方林业生产,丰富树种资源,扩大优良树种的引种栽培地区,满足各地的绿化需要,发展林副产品都很有现实意义。广东省林业部门引种云南树种,最少有四、五十年历史。在海南岛,本世纪四、五十年代时曾大量引种和繁殖西双版纳的速生薪炭和用材树种铁刀木,这种树在热带较肥沃的土壤上生长特别迅速,砍伐后萌蘖能力 Yunnan and Guangdong are two important provinces in our country with large-area tropical and sub-tropical environmental conditions. There are many things in common between them. Therefore, tree species exchanges and mutual introduction and domestication are of great practical significance for the development of forestry production in southern China, enrichment of tree species resources, expansion of the introduction and cultivation of fine tree species, meeting the needs of afforestation in various places and the development of forest byproducts. Yunnan Provincial Forestry Department introduced Yunnan tree species, at least four or five decades of history. In Hainan Island, in the 1940s and 1950s, a large number of fast-growing firewood and timber species, Tegundir, were introduced and propagated in Xishuangbanna. This tree grows particularly rapidly on the more fertile soils of the tropics. Its ability to sprout after harvesting