绵刺的生物学特性及其保护

The biological characters and protection of Potaninia mongolica

绵刺是蒙古高原特有的单种属植物，已列为国家二级重点保护植物。系统综述了绵刺的生态生物学特性，并探讨了其适应性，研究结果表明，绵刺具有典型旱生植物的结构和特征，耐旱、耐贫瘠、耐盐碱和抗风蚀能力较强，对恶劣的环境条件具有良好的适应性。另外还分析了绵刺濒危的可能原因并提出了保护措施。

Potaninia mongolica\% is the endemic single species genus plant in Mongolia plateau and has been classified as second degree national priority protective plant.In this paper,we have systematically described the eco biological characters of the \%P.mongolica\% and discussed its adaptation.The results show that \%P.mongolica\% has the typical structural and formal characters of xerophyte,and has strong capability of enduring dry,salt and infertility and of against wind erosion,so it can well adaptation to the cruel envirenment.\;In addition,we also have analysed the possible reasons that made the plant in the endangered:A.The natural regeneration capability of the plant is weak because of the smaller fruiting and germination percentages;B.It demand quite strict sand thickness for the plant to live in its living environment;C.The artificial damage is grave,ect.So some effective protective measures have been suggested as follows:A.The active propaganda and education should be carried on while the nature preservation is establishing;B.The science studies should be taken to search the ways and methods for artificial reproducing in order to expand the numbers of the species group.