论文部分内容阅读
对重庆四面山亚热带常绿阔叶林不同海拔、不同类型、不同土层的种子库中种子种类、数量、分布特征进行了研究。结果如下:1)种子库中种子种类和数量随海拔升高而减小;2)低海拔的种子库生态优势度最高,高海拔次之,中等海拔最低。生态优势度高的种子库物种多样性指数和群落均匀度都低;3)种子密度随土层加深而减小;4)山脊林窗种子库数量和种数最少,但损耗率最低.萌发率最高。
The species, quantity and distribution of seeds in seed banks of subtropical evergreen broad-leaved forests at different altitudes, different types and different soil layers in Chongqing were studied. The results were as follows: 1) The seed types and numbers in the seed bank decreased with the elevation; 2) The seed bank in the low altitude had the highest ecological dominance, followed by the high altitude and the lowest altitude. The species diversity index and community evenness of seed banks with high ecological dominance were both low; 3) The seed density decreased with the deepening of soil layers; 4) The seed banks with the lowest number and population of seedlings of mountain glade had the lowest loss rate. The highest germination rate.