| Urban riverside green space has the environmental advantages of organic combination of water area and land area,and plays a variety of functions such as ecology,landscape,safety and humanity in urban environment.Plants are an important part of riverside green space.When building the landscape of riverside green space,abundant plant species are beneficial to improve the community stability and enhance its ecological benefits.In addition,from the perspective of users of riverside green space,building a landscape that meets the needs of public aesthetics and life will effectively promote human health and sustainable development of landscape.In the construction of riverside green space plant landscape,it is one-sided to consider only "ecological benefits" or "visual landscape",and understand what kind of plant landscape the public likes,what kind of plant landscape space stay activities,the relationship between plant diversity and public residence and plant landscape preference,It is of great significance to explore how to create plant landscape with both landscape and ecological benefits.Taking the riverside green space of three rivers,Dongfengqu,Xiong’er River and Qili River in Zhengzhou city of Henan Province as the research object,the species and diversity of plants in riverside green land were studied by general survey and sample survey.The dynamic experiment was designed.The photos of the crowd gathering area in different time periods of riverside green space were recorded through field investigation,and the spatial distribution characteristics of visitors’ stay were analyzed.The behavior characteristics and spatial distribution of the photo spots of riverside green space were analyzed by using the method of tourists’ voluntary shooting(VSEP).The paper selects the indexes to quantify the spatial physical and spatial elements of visitors’ stay and plant landscape preference samples.SPSS software is used to analyze the relationship between plant diversity,landscape evaluation factors and visitors’ residence preference and plant landscape preference,and summarizes the influencing factors of downstream people’s residence and plant landscape preference.The static experiment was designed.The students of specialty and non specialty were selected to evaluate the space of different types of plant landscape by using the beauty evaluation method(SBE),and to explore the factors influencing the public plant landscape preference,different attribute groups and the differences of plant landscape preference under static and dynamic tests.The results are as follows1.There are 210 species of plants belonging to 144 genera and 67 families in Dongfengqu,Qilihe and xiongerhe.The order of plant species in the three rivers is xiongerhe > Dongfengqu >Qilihe.Rosaceae,Leguminosae,luteaceae,Gramineae and Compositae are widely used in the riverside green space in the research area.The species ratio of arbor,shrub,herb and vine is about16:11:7:1,and the species ratio of evergreen and deciduous plants is about 1:2.7.The top ten important plants were Koelreuteria paniculata,weeping willow,Photinia serrulata,Poa pratensis,Ligustrum lucidum,Ophiopogon japonicus,Pittosporum fortunei,Nandina chinensis,Sophora japonica and Ligustrum lucidum.The plant diversity level of riverside green space in the research area is not high on the whole,and the richness,diversity,dominance and evenness index are tree layer > shrub layer > herb layer.Compared with shrub and herb layer,tree layer is more abundant in plant species and more evenly distributed in riverside green space.By analyzing the plant diversity of riverside green space in different rivers,it is found that the plant diversity level of tree,shrub and herb layer in Dongfengqu is higher than that in Qilihe and Xiong’er rivers,and the tree layer is unevenly planted,while the shrub and herb layer is evenly planted.2.The study of visitors’ preference for staying found that the most frequent stay points were in the middle and late evening of a day,followed by the morning and the least in noon.The number of the three riverside green spots on weekends is higher than that of working days.The hot spots are mainly distributed in the road plant landscape space,square plant landscape space and waterfront plant landscape space.SPSS correlation analysis found that visitors tend to stay in the plant landscape space with abundant plant species and ornamental characteristics,high green visual rate,large planting area of trees and shrubs,moderate spatial visibility,large grassland area and flowers.3.The study of visitors’ preference for plant landscape shows that the route of volunteer tour shows high hydrophilicity.At the beginning of the tour,there were many and concentrated photo spots.After that,with the decrease of physical strength and the increasing of environment boredom,the photo spots gradually decreased.The subjects’ shooting interest points are mainly distributed along the road,and the close water road plant landscape space,waterfront plant landscape space and lawn landscape space are the denser areas.The high frequency feature words are divided into three parts: landscape,behavior and perception.Volunteers pay attention to landscape elements most,and the vocabulary of trees,flowers,lawn and so on is mentioned frequently.The influence factors of downstream human plant landscape preference were analyzed by SPSS software.It was found that the tourists preferred plant types and ornamental characteristics,and could enter the plant landscape space with large grassland area,flowers,undulation,moderate open space view and water scenery.4.In static experiment,the score of landscape beauty of different types of plant landscape space is as follows: Road plant landscape space > waterfront plant landscape space > square plant landscape space > lawn landscape space > pure plant community landscape space.The aesthetic evaluation of different gender and professional personnel is generally consistent.The results of SPSS regression analysis show that the factors influencing the landscape beauty value are species richness(x1),main color(x2),surrounding element area(x3),green apparent rate(x4),accessible grassland area(x5),ornamental characteristic richness(x6),spatial line of sight(X7),water area(x8).The landscape evaluation model is as follows:SBE=0.021+0.008X1-0.014X2-5.285X3-2.225X4 +1.647X5+0.113X6+2.294X7+2.830X8Under the static test,the public preferred the plant landscape space with rich plant species and ornamental characteristics,large accessible grassland area,high spatial visibility,large visible water area,harmonious color,less surrounding interference elements and moderate green visibility.5.The results show that the preference level of most of the samples is consistent in the dynamic and static tests.Comparing the average values of the quantitative indexes of different preference grades in the dynamic and static tests,it is speculated that the subjects in the dynamic and static tests prefer plant landscape space with rich plant species and ornamental characteristics,large area of grassland,combination with water scenery,less interference elements around,green vision and moderate open space sight. |
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