Polypores Resources And Flora Characteristic Of Huoditang In Qinling Mountains

Huoditang Foreast Region in Qinling Mountains locates at the transition of subtropics and warm temperate zone, its vegetation and the species of Polypores is abundant. In this study, the species, ecological distribution and flora of the Polypores of Huoditang in Qinling Mountains were investigated, which gives people clearer recognition of the Polypores of this area and provides the foundation for further exploitation and utilization of Polypores resources. The results as follows:126 species of Polypores were identified. They belong to 52 genera,12 families, in which, 3 species are new in China ,and they are Coriolopsis byrsina (Mont.) Ryvarden,Inonotus crocitinctus (Berk.&Curt.)Ryv and Hyphodontia apacheriensis (Gilb. & Canf.) Hjortstam & Ryvarden. 17 species are new in Shaanxi Province.The Polypores resources are very abundant. While the dominant families are Polyporaceae,Hymenochaetaceae,Fomitopsidaceae,Stereaceae, the dominant genera are Trametes,Coriolopsis,Polyporus,Stereum,Corticium,Ganoderma,Gloeophyllum,Lenzites,Trichaptum,Tyromyces, in which ,55 species are pharmaceutical,8 species are edible and 1 poisonous . There are 99 species of white rot type of Polypores belonging to 35 genera and 10 families which has 78.57% and rank the highest amount type in the Qinling moutains in this investigation; While there are 25 species of brown rot type of Polypores belonging to 5 genera and 12 families, only covering 19.84% of the whole.Influences of the ecological factors, such as forest type, moisture, temperature and season, on the occurrence of Polypores are extensively discussed in this dissertation. Quercus aliena var. acuteserrata forest has the most diversified Polypores species,70 species, accounting to 55.56% .Mixes forest(Pinus tabulaeformis and Quercus aliena var.acuteserrata) occupies the second place,64 species , accounting for 50.79%. Polypores in Chinese pine forest is the least,6 species, only 4.76% .The result of flora diversity study indicated that there were rich fungal flora in Huoditang Forest Farm in Qinling Mountains. In genera, Cosmopolitan elements are the main characteristics in Qinling Mountains 63.46%, with 15.38% of pantropical element and 15.38% North Temperate element, respectively. Regarding the composition, the species can be divided into 8 geographical elements, Cosmopolitan element 30.95%, North Temperate element 26.19%, Temperate-subtropical or Tropical element 18.25%, Tropical Asia-Tropical America element 14.29, Eastern Asia-North America element 6.35%, Eastern Asia element 3.17%, Endemic element to China 0.79% and Endemic element to Qinling Mountains 2.38%. Of these 8 geographical elements, North Temperate element is the main characteristics in the region. The fungal flora in Huoditang Forest Farm in Qinling Mountains is very similar to that of Southwest region of China.This suggests that the origins of these two floras may have a certain relationship.