云南的龙脑香林

在云南省东南部、南部及西南部陆续发现了由龙脑香科树种所组成的森林，共分七类，其中三类是以龙脑香科树种为优势的单优林。本文概述了各类龙脑香林的分布、生境、组成、群落结构特征以及立木蓄积量和天然更新调查材料。通过比较，说明在组成成分、山地植被垂直带谱等方面，云南龙脑香林与邻近的亚洲热带雨林都是很接近的；而在云南的热带植被中，它们属于比较湿热的类型。 高大茂密的龙脑香林具有丰富的组成种类和很高的生产力，是我国珍贵的自然资源，应重视保护，并加强研究利用。建议在河口、马关县和绿春县李仙江地区再增设龙脑香林自然保护区。

The Dipterocarpaceae Forests in Yunnan Province

Forests consisting of the Dipterocarpaceae have been found in the southeast, south and southwest of Yunnan Province. The forests can be divided into seven types, three of which are excellent mixed forests dominated by trees of Dipterocarpaceae. This article deals with the distributions, habitats, compositions, the characteristics of the community organization, the growing stock and preliminary information of natural regeneration of every kind of the Dipterocarpaceae forests. By the comparison it shows that the Dipterocarpaceae forests in Yunnan are very similar to the tropical rain-forests of Southeast Asia in components, vertical zone of distribution, etc.The dense Dipterocarpaceae forests are rich in aggregate components and have great productivity. They are the valuable natural resources of our country. We must take vital and effective measures for their protection. Further more, to fit in with the needs of forests, we should explore the scope of the Dipterocarpaceae trees and make reasonable use of them.