豫西熊耳山领春木分布规律调查研究

领春木（Euptelea pleiosperma Hook．f.et Thorns．）为国家重点保护野生植物．为了了解领春木在豫西熊耳山的种群数量、分布规律及生长发育状况，对熊耳山的领春木进行了初步调查研究．结果表明：领春木在熊耳山的分布北坡多于南坡，在北坡主要分布于海拔700～1800m范围内，在1200～1500m之间，领春木常成为群落申的亚优势种、优势种或建群种；在南坡，领春木分布于1200～1400m范围内，且呈零星散生状态．领春木为天然次生林群落中的过渡性树种，有被其它沟谷优势植物取代的趋势．熊耳山是领春木的集中分布区和适生区，应加强定向抚育管理和重点保护．

Study on Distribution of Euptelea pleiosperma Hook. f. et Thoms. in Xiong'er Mountain in the West of Henan Proince

Euptelea pleiosperma Hook. f. et Thoms is a state level rare plant species. To know well its species amount,distribution,growth ruler,preliminarily investigated the resources in Xiong'er mountain in the west of Henan province. The results show that:there is more Euptelea pleiosperma Hook. f. et Thoms on the north slope than it on the south slope. On north slops,it is distributed mainly an elevation of 700～1800 m,it is sub-dominant species,dominant species or constructive species;On south slops,it is sporadically distributed an elevation 1200～1400 m elevation. Euptelea pleiosperma Hook. f. et Thoms is a transitional species of natural secondary forest community,and has the trend of being replaced by other dominant species of the valley. Xiong'er mountain area is a concentrated distribution area and suitable area for Euptelea pleiosperma Hook. f. et Thoms,it should be directed cared and protected in this area.