Study On Artificial Synthesis Of Ectomycorrhizae And Selecting Of Excellent Ectomycorrhizal Fungi

In accordance with low survival rate and low conservatory rate of afforestation and difficulty of recovering the vegetation in arid and semi-arid areas, and the old silviculture technique which is difficult to effectively resolve the problem, the study attempts to adopt mycorrhizal biology technique to restore and reconstruct local vegetation. In the base on many years' investigation of vegetation and ectomycorrhizal fungi resources, the research selects three tree specieses named Pinus sylvestris L var mongolica, Pinus tabulaeformis, Ostryopsis davidina with eight fungi named Suillus3, Suillus4, Suillus99, Nsp, Cenoccum geophilum-AM51, Cenoccum geophilum-54, Paxillus Involutus , Rhizopogon rubsescens. Firstly, it defines artificial systhesis conditions of ectomycorrhizae. Then it does experiments on ectomycorrhizal synthesis. Finally, in the foundation of different fungi effect on different seedlings growth and mycorrhizal effect, it selects excellent ectomycorrhizal fungi at two levels about the same tree species with the different fungi and the same fungus with different tree specieses, evaluates the seedlings from the morphology index and physiology index . The preliminary results of the experiment maintain as follows. In arid and semi-arid areas, the excellent ectomycorrhizal fungus of Pinus sylvestris L var mongolica is Suillus sp4. The excellent ectomycorrhizal fungus of Pinus tabulaeformis is Cenoccum geophilum-AM51. And the excellent ectomycorrhizal fungus of Ostryopsis davidina is Suillus sp3. The local ectomycorrhizal fungus is prior to the exotic fungus.