Evaluation And Community Characteristics Of Wild Woody Ornamental Plants In Kuanshui National Nature Reserve In Guizhou Province

Wild woody ornamental plants are woody plants which have certain ornamental value and can beautify the nature and human living environment.The investigation of wild ornamental plant resources is an important topic in the research and utilization of landscape plants.It can not only enrich the diversity of plant species and landscape abundance,but also serves an important role in effectively protecting wild ornamental plant resources.Kuankuoshui National Nature Reserve is located in Suiyang County,Guizhou Province.Its unique natural environment breeds rich and diverse wild woody ornamental plant resources.In this paper,the wild woody ornamental plants and typical plant communities in Kuankuoshui Nature Reserve will be investigated by using the method of transect and quadrat.After studying a large number of relevant literature,the floristic plant ecology,Quantitative Ecology and other theoretical methods will be applied to analyze the species composition,floristic characteristics,community structure and species diversity in this paper.At the same time,a comprehensive evaluation system will be established for some wild woody ornamental plants with good ornamental value to be studied and evaluate.The results are as follows:(1)According to the investigation and statistics,there are 580 species of wild woody ornamental plants belonging to 85 families and 235 genera,14 species of gymnosperms belonging to 6 families and 11 genera,561 species of dicotyledons belonging to 78 families and 223 genera,and 5 species of monocotyledons belonging to 1 families and 1 genera.From their life form composition perspective,there are 224,302,5,47 and 2 life form species of arbor,shrub,subshrub,woody liana and parasitic interlayer shrub,respectively deciduous species slightly having an advantage over evergreen species.From the floristic analysis,there are 8 types and 10 forms at the family level,including 47 tropical families and 23 temperate families,the tropical families being dominant.There are 14 types and 15 forms at the level of genus,102 genera belonging to tropical elements and 127 genera belonging to temperate elements.The flora in this area has tropical affinity,being characterized as middle subtropical flora and it is deeply influenced by temperate elements.(2)Using AHP to build a comprehensive evaluation system in line with the objective of this study,considering the ornamental value,ecological adaptability and resource potential of the three main limiting factors,the wild woody ornamental plants in the nature reserve were comprehensively evaluated and sorted.The wild woody ornamental plants in the nature reserve were classified into 14 species of grade ?,27 species of grade ?,44 Grade ? supplementary resources,and 25 Grade ? species.The recommended wild woody ornamental plants should give priority to the ornamental value,and take the flowering shrubs and arbors in spring as the main recommended species,and then combine the ecological adaptability and resource potential to develop and utilize reasonably,moderately and sustainably.(3)By analyzing the appearance of the plant community,it is found that the plant community in the reserve is dominated by medium and small phanerophyte,and the life form spectrum is characterized as the main forest communities in the middle subtropical broad-leaved forest region in the life form.In vertical structure,Fagus lucida is the dominant species in arbor layer,Cyclobalanopsis multinervis,Sassafras tzumu and Lindera megaphylla are the common dominant species,Chimonobambusa utilis is the dominant species in shrub layer,and Elatostema involucratum is the dominant species in herb layer except pteridophyte.In diameter class structure,the overall diameter class distribution of the community in the nature reserve is relatively uniform,showing a growth type.However,some dominant tree species have difficulty in population regeneration,gradually developing to a decline type.The species diversity index is used to analyze the diversity of different communities.The results show that the species diversity of different communities is quite different,but the trend of the four indexes in the community level is Tree Layer > shrub layer > herb layer.To sum up,the evaluation of woody ornamental plants and the study of plant community characteristics in Kuankuoshui Nature Reserve are of great significance for the conservation of plant resources,the cultivation of regional species diversity and the promotion of sustainable development and utilization of natural resources in North Guizhou and even Guizhou Province.