从甲鱼池底泥中分离纯化获得一株水质净化功能目标菌,根据其形态特征、生理生化反应、G+Cmol%含量及16S rDNA全序列分析,该菌株鉴定为假单胞菌(Pseudomonas sp.)。培养试验证明,该菌株对光照、通气和pH等环境条件具有较广的适应范围。甲鱼苗养殖池接种试验结果表明,该菌株对水体中铵态氮和氨态氮的净化作用显著,对亚硝氮的净化效果尤为突出,达到65.4%。因此,该菌株可望开发成为微生态制剂,用于改善水产养殖水体的水质。 According to its morphological characteristics, physiological and biochemical reactions, G + C mol% content and 16S rDNA sequence analysis, the strain was identified as Pseudomonas sp. ). Cultivation test showed that the strain has a wide range of adaptation to environmental conditions such as light, aeration and pH. The result of inoculation test showed that the strain had a significant purifying effect on ammonium nitrogen and ammonia nitrogen in water body, especially the purification of nitrite nitrogen reached 65.4%. Therefore, the strain is expected to be developed into a probiotic for improving the water quality of aquaculture water bodies.