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对无锡市效区“河埒渔业一队”典型高产鱼池中异养细菌种类、数量及群落组成的分析测定,它表明在1984年3月至10月试验期间,试验鱼池水体中总细菌数和异养细菌数分别在1.30×10~5～15.90×10~5个/ml和1.56×10~4～14.50×10~4个/ml。鱼池淤泥中总细菌数和异常细菌数分别在1.20×10~6～68.0×10~5个/克和1.94×10~5～19.90×10~5个/克。同时经分析得知,试验鱼池中细菌数量的波动与鱼池水温等理化因子各有不同的相关关系。试验鱼池水体中共分离出11个属的异养细菌,其中优势菌为氮单胞菌属(Azomonas)等具固氮能力的菌属;淤泥中共分离出8个属的异养细菌,其中优势菌为芽孢杆菌属(Bacillus)等革兰氏阳性菌属。假单胞菌属(Pseudomonas)的细菌普遍存在于鱼池的水体及淤泥中。试验表明,高产鱼池中的细菌数量变化有一定规律性,细菌数量及异养细菌的群落组成与鱼池的鱼产量有一定的关系。
The analysis of the species, number and composition of heterotrophic bacteria in a typical high-yielding fish pond in the “First Team of River Tuna Fishery” in Wuxi City showed that during the period from March to October 1984, the total number of bacteria and Heterotrophic bacteria were 1.30 × 10 ~ 5 ~ 15.90 × 10 ~ 5 / ml and 1.56 × 10 ~ 4 ~ 14.50 × 10 ~ 4 / ml, respectively. The total number of bacteria and the number of anomalous bacteria in pond sludge were 1.20 × 10 ~ 6 ~ 68.0 × 10 ~ 5 / g and 1.94 × 10 ~ 5 ~ 19.90 × 10 ~ 5 / g, respectively. At the same time, the analysis shows that the fluctuations of the number of bacteria in the fish ponds have different correlations with the physical and chemical factors such as the water temperature of fish ponds. A total of 11 heterotrophic bacteria were isolated from the fish ponds. Among them, dominant bacteria were nitrogen-fixing bacteria such as Azomonas. Eight heterotrophic bacteria were isolated from the silt, among which dominant bacteria were Gram-positive bacteria such as Bacillus. Bacteria of the genus Pseudomonas are commonly found in the water bodies and silt of fish ponds. The results showed that the number of bacteria in high-yielding fish ponds had certain regularity. The number of bacteria and the composition of heterotrophic bacteria were related to fish production in fish ponds.