The Investigation And Evaluation Of Resource On The Aquatic Flowers In Poyang Lake

Poyang Lake is located in the middle reaches of the Yangtze River south bank, the northern part of Jiangxi Province, in 115°47’to 116°45’degrees east longitude, latitude 28°22’to 29°45’ degrees, which belongs to the subtropical humid monsoon region. Poyang Lake is China’s largest freshwater lake, is also China’s second largest, after the Qinghai lake. For the state-level nature protection area, was included in the Ramsar list of wetlands of world famous. The construction of Poyang Lake ecological economic zone rises for national strategy, based on the area’s unique resources and the advantages of the ecological environment, the Poyang Lake area construction becomes a beautiful ecological environment, the rapid economic development, social harmony and functional area. In order to serve the major strategy, from Poyang Lake, Poyang Lake to beautify ecological protection level system in-depth study of Poyang Lake aquatic flowers have important realistic significance. Research shows that, Poyang Lake aquatic macrophytes community area of 1081 square kilometers, submerged plant communities with an area of 420 square kilometers, aquatic vegetation distribution area of about water season is normally in the waters of Poyang Lake area 58%. Aquatic flowers community in Poyang Lake wetland biological prey, its situation is related to the survival of wetland in Poyang Lake. The present study in 2010November to2012March comprehensive survey of Poyang Lake Aquatic flowers species distribution and collection of specimens, and in the interior of its classification and identification The main types of comprehensive evaluation, and filtering out certain ornamental value and development prospect of aquatic flowers. For the beautification of Poyang Lake and provide reference for ecological protection in Poyang Lake, Poyang Lake a aquatic flowers resources exploitation and utilization on. The main results are as follows:1.Poyang Lake aquatic flowers isrich in resources, in a 17 survey points collected 216 specimens, which identified 207 species, belonging to 70 families and 163 genera. The ferns 5 families 5 genera in 5,65 families of angiosperms (monocotyledonous plants 14 families 39 genera and 47 species,51 families and 119 genera in dicotyledonous plants155 species).2. In the survey, collected 207 species of dominant families (≥5) of the total number of 10 Department department. Are the Labiatae,Leguminosae,Gramineae, Compositae,Polygonaceae,Ranunculaceae,Rosaceae,Umbelliferae,Cyperaceae and scrophulariaceae.3. The 207 plant specimens of emergent plants,18 species, accounting for 8.7% of the total; floating-leaved plant 7 species, accounting for 3.4% of the total; floatingplants 5 species, accounting for 2.4% of the total; submerged plants 3 species, accounting for 1.4% of the total; the shore wetland plants 174 species, accounting for 84.1% of the total.4. The aquatic flowers in Poyang Lake of seed plants geographical distribution has 7 main types. With the world wide cloth (39 subjects), pantropical distribution (16 subjects), north temperate (5 subjects) mainly tropical distribution, there are 19 families,the flora family number 29.2%,temperate distribution 7 department,the flora family number 10.8%.The aquatic flowers in Poyang Lake department geographic distribution with certain tropical, and Poyang Lake is a subtropical monsoon humid climate coincide.5. Poyang Lake aquatic flowers of genus of seed plants in the area is divided into 12 types. The distribution in the world (45 genera, which account for 28.5% of total genera), pantropical distribution (41 genera, which account for 25.9% of total genera), north temperate (24 genera, which account for 15.2% of total genera) mainly.6. In a 17survey points higher frequency in the plant has 23 kinds. Water chestnut (Eleocharis dulcis (Burm. f.) Trin. ex Henschel.) respectively, cocklebur (Erigeron annuus (L.) Pers.),(Aeschynomene indica L.) and adorable (Aeschynomene indica L), clover (Kummerowia striata schindl), water (Zizania latifolia (Griseb.) Stapf), Polygonum perfoliatum (Polygonum perfoliatum L), (Alternanthera Alternanthera philoxeroides philoxeroides (Mart.) Griseb), rockbell (Wahlenbergia marginata (Thunb.) A. DC), Chenopodium album (Chenopodium album), litchi chinensis grass (Saluia plebeia R. Br.), grass (Polygonum hydropiper L.var.flaccidum Polygonum subsystem (Meissn.)), Artemisia vulgaris (Artemisia selengensis), Arundo donax (Arundo donax), Ma Lan (Kalimeris indica (Linn.) Sch.)), Buttercup (Ranunculus japonicus Thunb) (Gnaphalium affine), cudweed, cress (Oenanthe javanica (Blume) DC), Carex (Car ex tristachya), Mazus (Mazus japonicus (Thunb.) O. Kuntze), Polygonum hydropiper (Polygonum plebeium R. Br dock (Rumex), japonicus Houtt.), wild carrot (Daucus Carota L.).7. Screening has the ornamental value of aquatic flowers of 52 species, belonging to 31 families and 47 genera. Application of analytic hierarchy process (AHP) to evaluate 52 kinds of ornamental plants were selected, including 14 grade Ⅰ, Ⅱ grade 16,12 grade Ⅲ, Ⅳ 10. This method system is proved to be satisfied in flexibility and accuracy and it was a scientific foundation for exploiting and utilizing the aquatic flowers in Poyang lake.