黄土丘陵沟壑区不同复垦时间沙棘纯林物种多样性分析

以生态修复为目的的人工沙棘林具有较好的水土保持效应,在生态环境的恢复建设中意义重大。但是通过对沙棘群落土壤种子库和地上植被的研究发现,随着样地复垦时间的增加,其物种多样性指数的提高趋势下降。由此可见沙棘纯林存在弊端,应考虑生态建设的可持续发展。

Analysis on Diversity of Species of Pure Sea Buckthorn in Different Secondary Reclamation Time of Gullied Rolling Loess Area

Man-planted Seabuckthorn woods,that for the purpose of ecological rehabilitation,have fairly good effect of soil and water conservation and have a significant meaning in the rehabilitation of ecological environment.It is found out through the study on soil seed bank of Seabuckthorn community and standing vegetation that along with the increase of secondary reclamation time of sample lands,the increasing trend of index of diversity of species is decreased.Thus,we can see the malpractice existed in pure SeaBuckthorn woods and the sustainable development of ecologic building should be considered.