Study On The Plant Diversity Of The Greenway In Zhengzhou City

Greenway as corridor in the landscape elements, not only play an important role of connecting the urban green space, but also has to improve urban species diversity and maintain the ecological balance.Through the study of the greenway plant species diversity in Zhengzhou, on the one hand, it can provide the basis for the study of the greenway landscape diversity, on the other hand, it can provide reference for know introduction plant and the urban plants configuration. In this paper, analyzed the plant characteristics and ornamental characteristics of built-up greenway in Zhengzhou, researched the plant species diversity of representative greenways, in order to find the characteristics of greenway plants, to provide the basis for the construction of the greenway.Research results show that:1、There are 229 species plants belonging to 121 genera and 61 families of greenway in Zhengzhou, which gymnosperm has 16 species belonging to 8 genera, 4 families and angiosperm has 213 species belonging to 113 genera, 57 families, the angiosperm has greater advantage. The greenway plants accounted for the garden plant families, genera and species of 54.46%, 35.69% and 36.76% in the Zhengzhou. Native plants have 170 species, introduced plants have 59 kinds, introduction of plant is more flowers and foliage plants. From the point of family composition analysis, Rosaceae, Oleaceae, Gramineae, Leguminosae this 4 families proportion is greatly, this families accounting for 37.12% of Zhengzhou greenway species.2、After investigation proceeds, greenway of Zhengzhou has ornamental leaves plants, ornamental flowers plants and ornamental fruit plants 118 species, accounting for 51.53% of the total of the species. Among them, there were 82 species of ornamental flower plants, accounting for 35.81% of the species; Ornamental leaves plants have 50 species, accounting for 21.83% of the species; Ornamental fruit plants have 25 species, accounting for 10.92% of the species. Ornamental leaves trees, ornamental flowers trees and ornamental fruit trees have 63 species, accounting for 61.76% of the species of trees; Ornamental leaves shrubs, ornamental flowers shrubs and ornamental fruit shrubs have 55 species, accounting for 70.51% of the species of shrubs, ornamental plants is relatively rich. Ornamental flowers plants in pink-red series more, other color is less, flowering mostly concentrated in the spring and summer, less in autumn, winter is only one species.3、The investigation of the quadrat have 211 kinds of plants, including 93 species of trees,73 species of shrubs,41 species of herb,4 species of kenji, which belong to 114 generaand 57 families. On the physiognomy, evergreen woody plants and deciduous woody plants ratio 0.42 of Zhengzhou greenway, evergreen woody plants and deciduous woody plants ratio 0.33 of Zhengzhou greening, relative to Zhengzhou greening, greenway evergreen is less, and the aspectl change is more obvious.4、From the point of species application frequency, frequency application in the first 10 plants mainly includes ornamental plants and evergreen plants. The highest frequency plant of the tree layer is Glossy Privet, the highest frequency plant of the shrub layer is Photinia. From the species important value analyzing, trees layer and shrubs layer important value in the top 10 plant are ornamental strong, highly adapt. Importance values of all greenway plants in more than 9% were analyzed, found the most of the greenway is given priority to different ornamental plants, part of the greenway ornamental plants of important value is low, it to bring a single community landscape.5、The tree layer in the quadrat of the total species richness index, Simpson diversity index and Shannon-Wiener diversity index is higher than the shrub layer, the evenness index tree layer evenness slightly larger than the shrub layer.6、The each greenway of quadrat of species richness index showed tree layer > shrub layer, Simpson diversity index and Shannon-Wiener diversity index fluctuations lager, most greenway of diversity index showed tree layer > shrub layer, the trend of evenness index fluctuation and diversity index is more consistent. Compared with other greenway, songshan road, university of south road, south third ring road(erqi district) has high species richness, diversity and evenness, diaogou ecological corridors species richness, diversity and evenness is low.