摘要
对分布在贺兰山的国家一级重点保护植物四合木的分布区自然条件和分布面积的调查 ,初步探讨了造成四合木种群衰老、濒危的自然因素和人为因素 。
An investigation was made in Helanshan mountain on the natural condition of distribution area and distribution situation of tetraena mongolica which was one of the state class Ⅰspecially protected plants. A preliminary exploration was made on natural and artificial factors which have brought about the aging and endangerment of tetraena mongolion population. Some measures was put forward for the protection of the plant.
出处
《宁夏农林科技》
2000年第C00期44-47,共4页
Journal of Ningxia Agriculture and Forestry Science and Technology
