Classification Of Plant Functional Types Based On Warm Temperate Zone Secondary Forest At Huoshan Mountain

The study stands in the field were located in Qiliyu Forest Zone of Mt. Taiyue. At the altitude of 1250~2200m, the forest representative stands was chosen serving as standard plots, every increase 100m, at least set up a 50m×50m sample, the total of samples is 8.Applying the methods of field investigation and laboratory experiments to the research, measure every tree in the stands, while environmental factors were determined. Through the species composition, plant flora, Inter specific association, TWINSPAN classification, DCA and CCA ordination systematically analyzed the relationship between plant community in the study area and the environment. The results were as follows:1)There were 221 species of vines, belonging to 157 genera and 53 families in the Qili Valley experimental site, in which the pteridophyte account for 2 families, 2 genera and 4 species, the gymnosperm for 1 family, 2 genera and 2 specie, and the dicotyledon for 43 families, 133 genera and 187 species, the monocotyledon for 7 families, 20 genera and 28 species. The experimental site's flora can be divided into 12 distribution types and 6 subtypes. Among them, its percent are: North Temperate, 45.86 percent; World 11.46; Old World Temperate ,9.55 percent; all in all, the flora ch aracter belongs to temperate zone.2)According to the classification system of life form provided by Raunkiaer, Danmark ecologist , the life form of plant communities in Qiliyu Forest Zone of Mt. Taiyue was analysed, and the life form spectrum was organized. The life forms were according to Raunkiaer's classification: phanerophytes (28%), chamaephyte (5%), hemicryptophytes (41%), cryptophytes (4%), and therophytes (22%).3) Through Interspecific association, the plants of QiLi valley experimental site were divided into four plant functional types. The first group of functional is: Carya cathayensis Sarg.,Elaeagnus umbellata,Carex lanceolata Boott..The second group of functional is: Pinus tabulaeformis Carr.,Spiraea trilobata Linn.,Arthraxon hispidus (Thunb).The third group of functional is: Quercus liaotungensi Koidz.Forsythia suspensa (Thunb.),Carex lanceolata Boott..The fourth group of functional is: Larix principis-rupprechtii Mayr.,Lespedeza formosa (Vog.) Koehne.,Senecio nemorensis Linn.4)According to the results of TWINSPAN classification and DCA, CCA ordination, and in light of actual ecological significance ,the plants of Qili valley in the study area were divided into five functional types, namely: F1 Juglans mandshurica Maxim.,Syringa oblata,Syzygium aromaticum,Carex lanceolata Boott.;F2 Pinus tabulaeformis Carr.,Quercus liaotungensis Koidz.,Spiraea salicifolia L.,Carex lanceolata Boott.;F3 Quercus liaotungensis Koidz.,Acer ginnala Maxim.,Spiraea salicifolia L.,Forsythia suspensa (Thunb.) vahl.,Duchesnea indica (Andrews)Focke.;F4 Larix principis-rupprechtii Mayr.,Lespedeza formosa (Vog.) Koehne.,Senecio nemorensis Linn.;F5 Betula platyphylla Suk.Corylus heterophyllaFisch.exBess.Corylus heterophylla Fisch. Ex Bess.Var,Carex lanceolata Boott.5)Elevation and the environmental factor analysis result showed that in the plant functional type of dominant species include Pinus tabulaeformis Carr.,Larix principis-rupprechtii Mayr. and other conifers PH value of soil showing a weak acid. But in the plant functional type of dominant species include Quercus liaotungensis Koidz.,Betula platyphylla Suk.,Carya cathayensis Sarg.,Asso. Acer ginnala and other broadleaf trees PH value of soil showing a weak basic. With the altitude increased gradually the content of soil moisture,organic matter,alkhne hydrolysis N,total N,total phosphorus and available oacting K increased slowly. Conversely, with the altitude increased the content of total K reduced slowly. With the altitude increased gradually contents of available P first increase and then decrease.6)Analysis of various environmental factors related showed that elevation had positive correlation to soil pH, and rapidly available P content in soil. There were significant and positive correlations between elevation and the content of soil moisture,organic matter,alkhne hydrolysis N,available oacting K,total N and total P(P<0.01)...