关键词: 林木, 病原菌, 拮抗作用, 溶磷, 解钾

Abstract: Broad-spectrum antagonistic bacterium against forest pathogenic fungi, such as Fusarium oxysporum Schltdl, Haematonectria haematococca (Berk. & Broome) Samuels & Rossman, Colletotrichum gloeosporiodes Penz, Pestalotiopsisapiculatus (Huang.) Huang, were screened by plate confrontation method and mycelial dry weight method from nitrogen fixing bacteria in soil. The ability of phosphorus solubilization and potassium dissolving of strains were also studied. The results showed that there were 24 strains had strong antagonistic ability to 4 pathogenic bacterium, 11 strains of dissolved inorganic phosphorus, 7 strains of dissolved organic phosphorus and 4 strains of releasing potassium. The results of strain identification showed that strain 2024 was Bacillus subtilis subsp. subtilis and the strain 7014 was Pantoea vagans.

Key words: forest, pathogenic fungi, antagonism, phosphate solubilization, release potassium