Investigation And Application Characteristic Evaluation Of Plant Resources In Dehang Scenic Spot Of Hunan Province

Dehang scenic spot is located in the southern part of Wuling Mountains,one of the key areas for biodiversity of terrestrial ecosystem with global conservation significance.The diversity of habitats and the humid and rainy climate in this area have resulted in a rich variety of plant resources,but the overall composition of plant resources in this area is still unclear.In order to provide theoretical basis for the protection and development of plant resources in this area,this study used transect survey method,association rule method,analytic hierarchy process and the entropy weight method to explore the characteristics and application value of plant resources in this area.The main results are as follows:(1)Rich in germplasm resources,there were 1715 species of resource plant belonging to 776 genera and 186 families in Dehang Scenic Spot.According to the five categories of edible,medicinal,industrial,environmental protection and transformation and special germplasm resources,there are 574 species of edible resource plant belonging to 313 genera and 103 families,708 species of medicinal resource plant belonging to 449 genera and 139 families,805 species of industrial resource plant belonging to 426 genera and 128 families,491 species of protection and transformation of environmental plant resources resource plant belonging to 326 genera and 119 families,311 species of special germplasm plants belonging to 108 genera and 66 families.During the investigation,a new plant species was found,namely Scutellaria jishouensis.It is morphologically similar to S.indica and S.calcarata,but can be easily distinguished by its stem with forked adventitious roots,leaves membranous,glabrous,etc.Phylogenetic analyses showed that S.jishouensis and S.calcarata were sister species with good support.(1)Species composition is complex.The dominant number of the five types of plant resources were different.The edible and medicinal plants were mainly herbaceous,while the industrial and environmental protection and transformation plants were mainly woody.At the family level,the plant resources are mainly distributed in the world and pan-tropical areas,at the genus level,the plant resources are mainly distributed in the north temperate zone and pan-tropical areas,and at the species level,the plant resources are mainly distributed in East Asia and endemic to China,reflecting the basic attributes of the east Asian components.reflecting the basic attributes of east Asian components of plant resources in this region.(2)Diversity of resources.The five major plant resources can be divided into 20 minor plant resources.The edible plant resources included 142 species of wild vegetables belonging to 53 families and 117 genera,261 species of nectar sources belonging to 72 families and 176 genera,249 species of forage plants belonging to 51 families and 139 genera,130 species of wild fruits belonging to 28 families and 49 genera,and 49 species of coarse grains belonging to 22 families and 38 genera.Medicinal plant resources included 608 species of Chinese medicinal herb belonging to132 families and 405 genera,190 species of poisonous plants belonging to 67 families and 144 genera,99 species of botanical pesticide plant belonging to 46 families and 74 genera.Industrial plant resources included 429 species of grease plants belonging to 90 families and 239 genera,319 species of essential oil plants belonging to 88 families and230 genera,164 species of material plants belonging to 41 families and 79 genera,128 species of pigment plants belonging to 57 families and 97 genera,119 species of fibre plants belonging to 32 families and 88 genera,118 species of tanning plants belonging to 36 families and 72 genera,20 species of glue plants belonging to 14 families and 16 genera.Protecting and transforming environmental plant resources included 31 species of green manure plants belonging to 11 families and 23 genera,422 species of ornamental plants belonging to 114 families and 285 genera.Special germplasm plants resources included 9 species of endemic plants belonging to 7 families and 8 genera,86 species of rare and endangered plants belonging to 40 families and 66 genera,7 families and 8 genera,315 species of characteristic plants belonging to 60 families and 102 genera.It reflects the diversity and versatility of plant resources in this area.(3)Through correlation analysis,it is found that there is a certain correlation between various plant resources,among which there is a close correlation between grease-materials,Chinese medicinal herb-wild vegetables,Chinese medicinal herb-ornamental honey source and essential oil,essential oil-wild vegetable,essential oil-pigment.In addition,according to the comprehensive evaluation value,the resource plants in Dehang are divided into five grades,including 194 species of plants in grade I.this kind of plants have high application value,strong adaptability to the environment and rich resources,such as Chimonanthus praecox,Pyracantha fortuneana,Tetrastigma hemsleyanum,Gnaphalium affine,ect.This reflects the great utilization potential of plant resources in this region.(4)Combined with the local tourism development demand and the actual characteristics of plant resources,analyzing the plant resources of wild vegetables,poisonous,chinese herbal medicines,essential oils,pigments and ornamental plants,and found that there were 19 kinds of common wild vegetables in this area,such as Toona sinensis,Cryptotaenia japonica.The toxic parts of toxic plants are mainly the whole plant,the toxic chemical components are mainly alkaloids,and the toxicological types are mucosal irritant toxicity.There is a certain correlation between the families,genera,chemical components and efficacy of chinese herbal medicine,such as Liliaceae-saponins,zanthoxylum-alkaloids were highly correlated with chemical components of chinese herbal medicine.High correlation with the efficacy of Liliaceae-expectorant cough suppressant and anti-asthmatic drug,Hypericum-styptic.The oil storage parts of essential oil plants are mainly leaves and whole plants,with a total of 10 kinds of oil content of more than 10%.The chemical components of essential oil are mainly terpenoids,and the use type is mainly daily chemical industry.The pigment parts were mainly leaves and fruits,and the pigment colors were red,black and yellow more frequently,mainly in warm colors,The plants with flavonoids as pigment chemical components were the most.Among the uses of various pigment chemical components,the types of raw materials used as hair dyes were the least.The ornamental parts of ornamental plants are mostly flower plants,and the garden uses are mainly ornamental plants.These plant resources are abundant in Dehang and should be paid attention to and reasonably developed and utilized.To sum up,based on the research of the plant resources in Dehang,First the paper reveals the features of the region plant resources of germplasm resources are rich,complex structure characteristics,the second by correlation analysis and comprehensive evaluation reveals the application value of the plant resources,the region based on the above two points can be DE ram scenic spot the protection and development and utilization of plant resources provide theoretical guidance,It also provides scientific information for youth research trips in the area.