Study On Woody Liana Resources Of Bifengxia In Ya’an City

By using the line-road and sampling plots investigation methods of Bifengxia scenic woody liana resource is studied, based on what types of resources, the families, genera flora and ecological habits, ornamental characteristics were analyzed, the study of regional biodiversity, using AHP to watch evaluation of study area woody liana, and accordingly recommends high ornamental value, have greater development potential of the species and landscaping. The main results are as follows:Bifengxia scenic woody liana species richness. There are111species,51genera,22families accounting for woody liana, species, our28.95%and5.10%. Mainly species of them are in Rosaceae, Leguminosae, Liliaceae, Ranunculaceae, and Vitaceae.2Large genuses even contain more than10species, they are Rebus10species and Clematis10species; and the monotypic genus containing1specie is at most amount among those woody liana.At family level, the floristic components showed tropical zone characteristics. About63.16%in total families and63.27%in total genera are tropical woody liana, the R/T reaches as high as2.21, which sufficiently shows that the woody liana in this Area originates from tropics.By comparison analysis with the floristic similarity of other4scenic areas, shows that the floristic genera coefficient of Bifengxia scenic area is higher, reached45.95%, the species coefficient in this area is only0.33, which indicates a high bin-inhabitation consistency as well as higher human disturbance in Bifengxia Scenic Area.The genera similarities coefficients between Bifengxia and other3floras in Fanjing mountain, Wawu mountain, Tianmu mountain are more than50%, which shows that they are of the same origination. Given the overall consideration of the genera similarities coefficients and species similarities coefficients, the woody liana in Bifengxia and Fanjingshan are closely related.Researches of species diversity point out that in17setting locations of sample, the following species are playing the dominant role, such as Rubus ichangensis, Holboellia grandiflora, Mucuna sempervirens, Rubus hunanensis, Smilax China, Rubus tsangii, Smilax glabra, Pueraria Montana var. Lobata, Broussonetia kaempferi, Hedera sinensis. The increasing altitude make the number of plants species, individuals as well as coverage decreased. Among the following types of brook ditch and shrub, the woody liana species number, individual number and coverage are significantly higher than other vegetation types. However, species and individual number of Cryptomeria fortunei component the minority. Discrepancies of a diversity index in those sample plot are very subtle, all is in2above, among whicha diversity index from Cryptomeria fortunei forest buttom the lowest point.βdiversity index, belonging to the same sample plot of same vegetation type shows higher. The bigger the altitude difference between two sample plots appears, the smaller the βdiversity index is. The coverage of woody liana in research area, because of the uneven spatial and punctate distribution, is less than30%.In order to enrich resources of research area’s woody liana as well as improve the scenic effect, the methods of artificial graft and breeding should be carried out.Studies on the ecological habits and ornamental characteristics state that in the researching area, types of woody liana are various; dicotyledons dominate while monocotyledonous plants are only consisted of one family-Liliaceae; the species of woody liana spreading in forest and shrub component the most, respectively amount to86and74; the main climbing is winding, up to26genera and52families, of which stems twining dominate; plant flowers, fruit, leaf, stem have high ornamental value, and woody liana is available for watching whole year; the researching areas contain a lot of vertical greening woody liana resources which can be used for scaffolding, corridor greening, fence greening,wall greening as well as mountain greening. Given factors, such as the spring summer ornamental period, dim color of flower and fruit, and low Display degree, we can introduce some species with higher display degree, Bright color as well as quality of whole year blossom so as to improve the ornamental value of Regional woody liana. By using artificial scaffolding and dragging,we can also raise the ornamental value.From3aspects of ornamental value, biological characteristics, development and utilities of resources potential, we can select17suitable evaluation index to construct the comprehensive evaluation model for the utility value of woody liana, while using analytic hierarchy process to judge the utility value of woody liana in Bifengxia. The evaluation results show the following woody liana, such as Mucuna sempervirens Hemsl., Wisteria sinensis., Trachelospermum jasminoides., Millettia dielsiana., Clematis armandil., Hedera sinensis. have higher utility values. According to the Comprehensive analysis of evaluation results, the5species, like Clematis armandii, Sargentodoxa cuneata, Diploclisia affinis, Clematis urophylla, Schisandra rubrifolia, with high use value, but still not in a large number of applications in gardens were given a detailed introductions in the characteristics of morphological, biological, landscape and other aspects.