Studies On Seed Flora In Huanglong Mountains Crossoptilon Mantchuricum Nature Reserve, Shaanxi Province

Huanglong Mt. Crossoptilon mantchuricum Nature Reserve in Hancheng, Shaanxi is aimed to protect Crossoptilon mantchuricum and its habitats. This paper studyed the seed flora, nature and characteristics, plant resources and vegetation resources in Huanglong Mountains Crossoptilon mantchuricum Nature Reserve, aiming to provide a reference for conservation and use of its biodiversity, and for habitat restoration. And provide the basic information for the study of the flora of Chinese Crossoptilon mantchuricum's habitat. The main results are as follows:1. Seed flora and plant resources in Hancheng Huanglongshan Crossoptilon mantchuricum Natural Reserve of Shaanxi province were studied according by investigating and statistical dataits. The result shows: It is comparatively rich in species, there are 97 families, 408 genera, 762 species (including infraspecific taxa), Among them, 729 species are of wild seed plant (belonging to 392 genera and 96 families), seed flora dominant families are comparatively rich, and dominant genera are poor, for example, dominant families have Compositae, Gramineae, Rosaceae, Leguminosae, Ranunculaceae, Liliaceae, Labiatae, etc. Monogenus is poor, The genera of including 2~5 species is comparatively rich, and many are herb. In addition, four genera belong to endemic to China. The geographical elements of the flora are comparatively complex and varied, the geographical elements of families have 5 areal types and 6 areal subtypes, and the geographical elements of genera have 15 areal types and 13 areal subtypes, among them, the genera of temperate are the dominant areal types. The flora is ancient origin, but also younger elements,2. Rare and endangered plants are poor the State-level protection of rare and endangered plants and key protection plants, 4 species, the Provincial key protected plants, 4 species, the protectorate area level key protection plants, 12 species.3. Resources plants is rich and varied the Medicinal plant, 445 species, the starch and carbohydrate plant, 64 species, the lipid plant, 62 species, the aromatic plant, 43 species, the potherb plant, 23 species, the pesticide plant, 135 species, the fiber plant, 52 species, the tanned plant, 54 species, the resin and gum plant, 16 species, the rubber and hard rubber plant, 3 species.4. The life forms of plant is variety, and main hemicrytophyte. Namely, there are phanerophyte, 205 species, chamaephyte 14 species, hemicryptophyte, 338 species, geophyte, 40 species, and therophyte.5. The elements of dominant floristic geography is mainly north temperate, at the same time, the tropic elements affect to a certainty the flora of this region.6. There are the diversity of vegetation types in Huanglong Mt. Crossoptilon mantchuricum Nature Reserve. The communities of secondary forest in the reserve are divided into 3 vegetation type group, 3 vegetation type, 4 vegetation subtype, 18 formation and 23 association.Finally, the concrete strategy of vegetation resources protection and utilization were given.