Study On Indigenous Plant Resources&Scenery In Anshun City

Indigenous plants are functioning to improve landscape effect and enrich plant diversity,promoting the development of urban biodiversity in return.To develop indigenous plant resources scientifically and reasonably,enrich urban landscaping plant landscape and form indigenous characteristics of plant landscape,this study applied literature research method and field investigation method to investigate and analyze the indigenous plant resources and their landscape application status in Anshun City.On this basis,Delphi method and analytic hierarchy process(AHP)are used to evaluate and screen indigenous plant resources,and then a proposal is put forward about the targeted application strategy for indigenous plant landscape in Anshun city.Contents and results are as follow:1)Anshun is a city rich in indigenous plants with outstanding characteristics.In the area,there are 1773 indigenous plant species categorized into 187 families and827 genera.Among all these species,there are 309 trees,421 shrubs,162 lianas,861 herbaceous plants and 20 bamboo;there are 8 gymnosperms and 1746 angiosperms,the latter belonging to 170 families and 802 genera,accounting for 98.03% of the total.They include 1453 flowering plants,accounting for 81.95% of the total resources,851 fruit plants,555 foliage plants,409 branch plants,306 evergreen plants and 78 aromatic plants.The city is abundant in reserves,complete in variety,diverse for the ornamental characteristics,most of which are obvious with indigenous characteristics.2)The coverage of indigenous indigenous plants in urban landscape greening is at low level.There are a total of 582 species of indigenous plants planted,belonging to 143 families and 428 genera,respectively.The species used has accounted for 32.83% of the total resource species.It includes 410 flowering plants,141 foliage plants,28 aromatic plants,96 fruit plants and 95 evergreen plants.Various types of coverage area for urban garden greening include: regional green space(423)> subsidiary green space(403)> park green space(275)> square green land(144).40 species such as Photinia fraseri Dres,Cinnamomum camphora,Osmanthus fragrans,are treated as capital trees of city landscape in Anshun city,and44 tree species such as Orchidaceae,Gesneriaceae,Gentianaceae,have not been brought into the city,which means that the majority of indigenous indigenous plants have not been fully cultivated for urban greening,and are growing in the wild.3)The construction of evaluation index system of indigenous plant resources is made on the basis of the criterion of ornamental value,ecological value,development potential and adaptability,and on the basis of 23 indicators,including the flower,foliage and fruit.The weighted value of the criterion for trees,shrubs and bamboo is ornamental value(0.3824)>development potential(0.2963)>ecological value(0.2190)>adaptability(0.1104).The weighted value of the criterion for herbaceous vines is ornamental value(0.3242)>development potential(0.3190)> ecological value(0.2727)> adaptability(0.0841).Through the analytic hierarchy process(AHP)method,it is suggested that the city cultivate species with high ornamental value,ecological value,development potential and high adaptability,including 131 kinds of trees,3 species of bamboo,152 kinds of herbs,74 species of vines,with a total of 459 species of indigenous plants.In addtion,855 kinds of plants are considered alternatives to for plant diversity in Anshun city,and 476 species of plants are considered low comprehensive benefit as supplementary plants.4)According to the status of urban landscape greening in Anshun city,it is suggested that 90 indigenous indigenous plants with higher weight of ornamental value in form,texture,color and season,are applied into park green space and attached green space,such as Sophora prazeri var.maieri,Hypericum patulum and Bauhinia purpurea;65 indigenous indigenous plants with higher weight of ecological value and adaptability are applied into regional green space and protective greenbelt,such as Machilus pingii,Indigofera tinctoria and Triarrhena sacchariflora;60indigenous indigenous plants with higher weight of development potential,are applied into square space,such as Paulownia,Coriaria nepalensis and Miscanthus sinensis.There are 50 spring plants,such as Cerasus scopulorum ? Melastoma candidum and Saururus chinensis;50 summer plants,such as Rhododendron simsii?Zenia insignis and Portulaca oleracea;55 autumn plants,such as Tilia fulvosa ?Bischofia polycarpa and Zingiber striolatum;25 winter plants,such as Armeniaca mume?Chimonanthus praecox and Pterolobium punctatum;20 indigenous indigenous plants,such as Litsea kobuskiana?Hypericum kouytchense and Berberis cavaleriei.Therefore,some strategies,such as formulating relevant local norms or standards,developing indigenous plants,studying on plant diversity and biodiversity conservation and landscape construction of Karst geomorphological cities,are put forward to promote and restrain the application of indigenous plants and to promote the development of urban biodiversity conservation and construction planning in Anshun City.