Discussion on the Plant-diversity Conservation and Development Strategy of Urban Green Space System——Taking Yancheng Planning Area as an Example

In this paper,four representative green lands are selected as targets to research on plant diversity in the Yancheng planning area,including Yancheng People's Park,Yandu Park,Chuanchang River scenery zone and Tongyu River ecological green zone.Yancheng People's Park and Yandu Park are the key points in the green space system.Yancheng People's Park has a long history while Yandu Park is a new green park.Chuanchang River scenery zone,being a new riparian green land,is blue and green lines which connect different green lands.But Tongyu River ecological green zone is a united area between line and plane.The plant diversity is analyzed based on a survey of four green lands.The results indicate the plant diversity is relatively higher in all green lands.But,it is a difference between the Simpson index and Pielou index because of community evolvement and artificial design.Plant diversity conservation and development strategy has also been purposefully put forward according to different green lands in Yancheng city.And the work would have certain significance for Yancheng ecological-landscape-city construction.