Studies On The Dendrocola Fungi Of Chinese Fir Plantation

Chinese fir is an important tree species for timber in the south of China, which is fast-growth, good-timber, high-yield, and abroad-distribution, and the plantation of Chinese fir has over millennium history. Chinese fir has a very important status and function in the south forestry production of China. Dendrocola fungi are important parts in Chinese fir plantation ecosystem, which occupy very important status in the whole Chinese fir plantation ecosystem. There are a lot of fungi on the surface of Chinese fir: some have a strong pathogenic, and can make health Chinese fir sensed diseases and influence the growth even cause the death of Chinese fir; some have a weak or no pathogenic; some have strong resistance function to pathogens and can suppress pathogens. In view of this, aimed at the weak research points, this thesis is based on ecological principle, adopts basic methods of mycology, forest pathology and community ecology, in which the population quantity, annual trends and species diversity of the dendrocola fungi in Chinese fir plantation ecosystem are studied, understand the Chinese fir dendrocola fungi different populations dynamic change under different environmental terms, for finding out the development rule of Chinese fir fungal disease, looking for benefit fungi group, and create favorable emergence ecological terms for the development of the helpful groups, thus create good microecological environment for the surface of Chinese fir, provide some theoretical bases for ecological control of the disease of the Chinese fir. The main results are as follows:1. Chinese fir plantation bud dendrocola fungi: Through isolating and culturing, 42 species fungi were obtained from Chinese fir bud, the advantage populations are Cladosporium herbarum and Pestalotiopsis apiculatum. 31 species fungi were obtained from bud body, and the advantage population is Cladosporium herbarum; 35 species fungi were obtained from bud scale, and the advantage population is Aspergillus terreus. 18 species bud dendrocola fungi were obtained in October, and the advantage population is Fusarium oxysporum; 12 in January, and the advantage population is Colletotrichum gloeosporioides; 15 in April, and the advantage population is Cladosporium herbarum; 21 in July, and the advantage population is Aspergillus terreus. 14 species bud body dendrocola fungi in October, and the advantage population is Nigrospora sphaerica; 8 in January, and the advantage population is Haplosporella sp.; 9 in April, and the advantage population is Cladosporium herbarum; 16 in July, and the advantage population is Aspergillus terreus. 15 species bud scale dendrocola fungi in October, and the advantage population is Haplosporella sp.; 12 in January, and the advantage population is Colletotrichum gloeosporioides; 13 in April, and the advantage population is Cladosporium herbarum; 16 in July, and the advantage population is Aspergillus terreus. Different crowns of bud dendrocola fungi have differences too: 23 species on the upper crown, and the advantage populations are Cladosporium herbarum and Penicillium sp.; 29 species on the middle crown, and the advantage population is Cladosporium herbarum; 28 species on the lower crown, and the advantage population is Colletotrichum gloeosporioides.It is proved that components and quantities of fungi on bud scales are obvious different from those on bud bodies, the components and quantities of fungi on bud scales are more than those on bud bodies, and that out of tissues are more than those in tissues.Species diversity analysis indicated: bud scale dendrocola fungi community has a larger species richness index, diversity index and evenness index. Bud dendrocola fungi community in July has a larger species richness index and evenness index, and October has a larger diversity index. Bud dendrocola fungi community on the middle crown has a larger species richness index, and dendrocola fungi community on the lower crown has a larger diversity index and evenness index.2. Chinese fir plantation needle dendrocola...