Vegetation Investigate And The Research On Typical Plant Community Construction In Nandujiang Basin

Hainan province is in the construction of international ecological tourism island, its mother river NanDuJiang about forest vegetation restoration and protection on both sides of the river basin become the important content in the ecological construction in hainan province. In this context, researching the forest status quo of vegetation, vegetation types, community structure on both sides of the river basin, and constructing the community system, will have the important meaning in the construction of vegetation restoration and ecological within the basin. Simulating natural, and building typical and stability artificial landscape plant community, can provide the theory basis for building zonal plant communities in hainan, provide reference for waterfront landscape construction within urban and rural areas on both sides basin, and provide technical guidance for tropical garden community construction and plant configuration.In this paper forest vegetation which is within the first layer ridge of natural terrain or within100m area of the ground on the both sides of NanDuJiang basin is as the respondents. Through the method of data collection, the present situation investigation, data processing and analysis, etc, it discusses the type selection and structure of constructing nature-approximate plant communities, and then conclude, summarized, refine several typical plant community mode.So as to guide the landscape construction of plant community on tropical garden. The main results are as follows:1) The flora characteristics in NanDuJiang basin. Its flora geographical elements gives priority to tropical, subtropical ingredients, and give the directivity to species choosing in the building of plant community. It recordes122families,357genera and515species of Vascular plants together, among19families,23genera and34species of ferns, and103families,334genera and481species of angiosperms. It also contain25rare and endangered plants and23exotic plants.2)The characteristics of community type and structure in NanDuJiang basin. Vegetation types of plant community in the sample plot of the river basin are divided into3vegetation type groups, contains broadleaf secondary forest, shrub forest and meadow;6Vegetation types, low mountain tropical rain forests-. tropical monsoon forest(Tropical evergreen forests、Semi-deciduous forests), shrub forest(Coastal shrub、 Beach scrub), Beach grass, and24formations. The analysis of5typical represents community can draw the community structure is composed of the tree layer, the shrub layer,the herb layer and the interlamination plants. The crown density of plant community is large.The important value between each layer of plants is larger, so can show the plant community has obvious dominant species. And build a scientific and applicable<Thes selected plant logging for the nature-approximate plant community construction in NanDuJiang basin>, including76families and230species.3) The nature-approximate plant community mode in the NanDuJiang basin. According to the difference of landscape types, divided into3types of plant community mode, which contains the plant community mode of the Artificial Rain Forest landscape, the plant community mode of Monsoon Forest landscape, the plant community mode of Sparse Shrubs and Lawn landscape. And put forward the "Bischofia poly carp a+Ficus variegata-Ficus subpisocarpa+Cryptocarya chinensis-Piper hancei+Psychotria straminea-Neottopteris nidus+Alpinia zerumbet-Tetrastigma-planicaule-Nephrolepis auriculata"etc2artificial rain forest community configuration."Bombax malabaricum+Ficus benjamina-Hydnocarpus hainanensis+Pterospennum heterophyllum-Mallotus hainanensis+Murraya exotica-Liriope graminifolia+Crinum asiaticum-Artabotrys pilosus+Tetracera asiatica" etc8Monsoon Forest community configurations."Cocos nucifera+Roystonea regia-Chuniophoenix+Livistoria chinensis-Axonopus compressus" etc3Sparse Shrubs and Lawn forest community configurations.