| Horticultural expositions in Jiangsu province has successfully held eight sessions.The construction of these horticultural expositions had a significant influence on the city development and greening level of Jiangsu province and even the whole east China area.This paper takes Taizhou garden expo,Suqian garden expo,Yangzhong garden expo in Jiangsu province as the object of study.Through overall survey and the quadrat investigation,it explored plant application status and the characteristics of plant communities of three garden expo,and it evaluated two types plant communities using the method of SBE and BIB-LCJ.Then,it analysised the excellent plant community cases that has concluded before.After that,this paper summed up the mode of plant configuration of each type.Finally,this paper summarized characteristic and the insufficiencies of the plant landscape in garden expo,and it gave optimization recommendations according to the existing problems in the landscape.The main conclusions are as follows:1.This paper investigated the plant communities of Taizhou garden expo,Suqian garden expo and Yangzhong garden expo in Jiangsu province,and it carried on the comparative analysis among them about the species composition,seasonal characteristics,plant type structure,numerical characteristics and diversity.The results show that Taizhou garden expo has a stable plant community,but herb layer of it is a litter single All aspects of level in Suqian garden expo is generally better.Species in Yangzhong garden expo is rich,but the tree layer is relatively single.2.Based on the regional position,61 samples were divided into 2 types:entrence plant communities and road plant communities.50 samples were selected from the 61 samples.Then using the SBE method,it evaluated plant community landscape in spring,summer and autumn of the 50 samples,and obtained the SBE scores of samples in each type.To make up the defects of SBE method,BIB-LCJ method was used to evaluate the condition of plant community landscape again.It found that the evaluation results are very close.3.Combined with evaluation results of SBE method and BIB-LCJ method,this paper gave a detailed analysis of the characteristics of plant community in each highest community,include drawing the plane graph,counting species information,analysising landscape characteristics and so on.At last,it summed up four different mode of plant community configuration.4.Finally,on the basis of analysis results above,this paper summarized the characteristic and the deficiencies of the plant landscape in three garden expo.And,it put forward the corresponding proposals for optimization problems in order to provide reference for the future development of horticultural expositions about plant landscape in Jiangsu. |
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