| The purpose of this paper is to study the community characteristics of mountain forests in southwestern Zhejiang,and to evaluate out-forest and in-forest beauty in the southwestern Zhejiang,to establish a model for the evaluation of the beauty,and to study the main factors which influent the out-forest and in-forest landscapes in the autumn,and to explore the optimal forest color composition model.Taking 42 plots in the mountain forests in southwestern Zhejiang as the research object,the system clustering method was used to divide the plant community,and the characteristics of each community were studied.The SBE method（the beauty evaluation method）was used to evaluate the fall forest and the forest.Close to the beauty of the landscape,the data is standardized and then imported into SPSS to establish a beauty evaluation model.The curve estimation method is used to study the influence of the main landscape elements on the beauty value;the evaluation model is transformed,and the enumeration method is used to obtain the best.The forest phase color constitutes the pattern.The main results are as follows:（1）The system clustering method can be used to divide the forest communities in southwestern Zhejiang into 21 groups including Pinus massoniana + Fragrant eucalyptus-Camellia oleifera-Manggao sylvestris,Pinus massoniana + Schima superba-Loropetalum-Dicranopteris dichotoma,and masson pine group.（2）In the plot of 25200 m2,there are 210 species of landscape plants,belonging to 67 families and 150 genera,including 9 species of ferns,belonging to 8 families and 9 genera,201 species of seed plants,belonging to 141 genera of 59 families.（3）The species diversity of the shrub layer in the forest landscape plants in the southwestern Zhejiang is greater than that in the tree layer.Based on the four diversity indices of arbor layer and shrub layer,the landscape plant diversity of Cinnamomum camphora+Pinus massoniana-Eurya muricata-Woodwardiajaponica cluster（C07）and Paulownia fortunei + Liquidambar formosana-Camellia oleifera-Dicranopteris dichotoma cluster（CIO）is the best,and the landscape plant diversity of Ulmus parvifolia-Cer.cis chinensis-Erigeron annuus（C16）and the Myrica rubra-Syzygium grijsii-Dicranopteris dichotma clusters（C18）is the worst.（4）The community structure characteristics of different clusters are different.For example,the scent of Liquidambar formosana-Vitex negundo-Pteris cretica（C09）has the highest canopy density and arbor density,but the average height of shrubs is the lowest;The average height,the average crown width of trees,the average height under trees,the height and the canopy density of Myrica rubra-Syzygium grijsii-Dicranopteris dichotom-clusters（C18）are the lowest.（5）The out-forest landscape beauty in autumn in southwestern Zhejiang is mainly affected by main color（x5）,green proportion（x8）,red proportion（x9）,yellow proportion（x10）and total saturation（x13）.The evaluation model of the out-forest landscape in the southwestern part of Zhejiang Province is:SBE=-2.999 +0.1 116x5 + 2.85x8 +5.05x9 +3.3x10+0.007x13（6）Judging from the ranking of the SBE of in-forest landscape,there is no obvious regularity in the distribution of the SBE in each group,but the SBE of the Ulmus parvifolia group is still the lowest.The main framing elements that affect the SBE of in-forest landscape in autumn in southwestern Zhejiang are total saturation（x 11）,forest arrangement（x 12）,average branch height（x19）,and undergrowth growth（x22）.Finally,The evaluation model of the in-forest landscape in the southwestern part of Zhejiang Province is:SBE =-1.059h+0.027x11-0.178x2 +0.084x,9 +0.143x22（7）The color composition model of forest forests in southwestern Zhejiang is:SBE=0.216x8c+0.383x9b+0.740x9c.The optimal color composition pattern of the optimal forest landscape in the autumn forests of southwestern Zhejiang is:70%-80%of green,20%-30%of red,and 0-10%of yellow.When this forest color pattern is adopted,the beauty of the out-forest landscape in the autumn forests of southwestern Zhejiang is the largest.（8）For the near-landscape of the forest,"color" is more important.For the forest landscape,the "forest structure" is more important.The reason is speculated that the color of the foreground is the most stimulating to the human visual experience,but for the close-up of the forest,the color is no longer so important,people pay more attention to whether the arrangement of the trees is beautiful,and whether the lower layer of the forest is neat. |
