鲁中水土保持生态修复区种子植物区系特征

Characters of spermatophyte flora in ecological restoration area of soil and water conservation in the middle of Shandong province

为鲁中石质山地水土保持生态修复过程中适宜植物种类的选择、保护与合理经营提供理论依据，对淄川峨庄水土保持生态修复区内植物区系组成和地理成分进行分析。结果表明：1）该植物区系内共有种子植物271种，隶属于61科157属，分别占我国种子植物区系科、属、种的17．28％、4．90％和0．998％，其中单种科和极小科（含2-9种）所含的种数占总种数的91．6％，单种属和含2-4种的属有161个，占总属数的96．18％，可以看出该研究区内植物科和属的分布是比较均匀和丰富的；2）该区植物区系温带成分，特别是北温带成分具有明显优势，热带性质属在该区系中占有较大的比例，说明该地区植物区系与热带植物区系有较密切渊源，并具有一定的亚热带一热带区系的过渡性；3）该区植物区系的特有性较低。

In order to provide the theoretical basis for selecting, conservation and reasonable managing of vegetation species in the course of ecological restoration of soil and water conservation in the mountain area of middie Shandong province, the composition of the spermatophyte flora and geographical characteristics were analyzed. The results show that firstly there are 271 kinds of seed plant in all in this flora, belong to 61 families and 157 genus, accounting for 17.28%, 4.90% and 0.998% of family, genus and species of the spermatophyte flora in our country separately. The number of species which include single family and light family （including 2 - 9 species） account for 91.6% of the total species. The number of the single genus and the genus which include 2- 4 genus is 161, accounting for 96.18% of the total genus. It can be showed that distribution of the family and genus in this flora are rather even and abundant. Secondly, the composition of temperate zone in this flora is obvious advantage, especially the composition of the north temperate zone. Genus of tropical nature in this flora occupy large proportion, it prove that the origin of this local flora and tropical flora is closed. It can be showed that distribution of the family and genus in this flora are more even and abundant. Thirdly, the endemicity of this flora is unconspicuous.