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

The forestry "Twelve Five" and the medium-and long-term development plan in Hainan provincial has stated that the river shelterbelt construction projects has been included in the eco-system project., the12th Five-Year plan of Sanya city has also used the beach vegetation restoration and protection project as the key project of the international tourist city construction in Sanya cit. In this context,the paper use the vegetation on both sides of Ningyuan river Basin which is the first rive of Sanya city in Hainan Province as the research object, selects the relative stability typical plant communities in the watershed area, investigates and systematic studys the floristic composition of plant communities, community types, typical community structure,summarizes the characteristics of typical plant communities in Ningyuan river basin and explores the artificial plant communities build mode in Ningyuan river. Thus,the paper not only provides a scientific basis to cological restoration of destructed natural vegetation and plant selection and configuration of plant communities in forest reconstruction modes of green garden in Ningyuan river basin,but also restores the vegetation ecological environment in Ningyuan river of Sanya city. The result will raise the level of plant community building in Hainan province,and has great significance and contribution to the sustainable development construction of the international ecotourism island in Hainan province.The main results are as follows:(1) The flora characteristics in Ningyuan basin. The survey area has recorded406species of vascular plants and lower units, which belongs to114families,313genera.among11families,16genera and22species and units,2families,2genera and2species of gymnosperms,101families,295genera,and382species of angiosperms and kinds of units. There are17species of national and provincial protection plants and24exotic plants.(2) The characteristics of community type and structure in Ningyuan 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,4vegetation types,including tropical rain forests, tropical monsoon forest (tropical evergreen monsoon forest, semi-deciduous monsoon forest), shrubberies. 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 plant community has the dominant species.(3)The artificial plant community mode in the Ningyuan basin of Sanya city.According to the difference of landscape types, divided into2types of plant community mode, which contains the plant community mode of the artificial rain forest landscape and the plant community mode of monsoon forest landscape. And put forward the "Toona microcarpa(C.DC)Harms+Bischofia polycarpa+Terminalia hainanensi+Ficus superba Miq. var. japonica Miq.+Wendlandia uvariifolia+Psychotria rubra+Alpinia katsumadai Hayata+Selaginella pictaA. Br. Ex Baker.+PellioniapulchraN.E.Brown+Piper hancei Maxim.+Tetrastigma planicaule "etc2artificial rain forest community configuration,"Evodia lepta+Sapium discolor+Pterospermum lanceaefolium Roxb+Symplocos poilanei Guill.+Eurya japonica van nitida Dyer+Breynia fruticosa (L.) Hook.f.+Psychotria rubra+Erythropalum+Smilax china"etc2monsoon forest community configuration.