光合细菌对水产养殖水质和水生生物的影响

研究光合细菌对水产养殖水体的水质,如化学需氧量(COD)、氨氮(NH₄⁺-N)、溶解氧(DO)、pH等指标,及对水生生物,如藻类植物和细菌的种群组成的影响。结果表明:鲤鱼养殖水中投放一定量的光合细菌,能明显去除水中有机物和NH₄⁺-N,增加DO的含量,稳定pH值。光合细菌对水中藻类也有明显影响,0.50%、1%剂量组中藻类明显增加,其中硅藻在所有藻类中所占比例可达26%以上,绿藻所占比例达60%左右,而以蓝藻为主的杂藻则下降到10%左右。光合细菌对有害菌有一定的抑制作用,使得弧菌属、气单胞菌属等致病菌所占比例显著降低。

Effect of photosynthetic bacteria on the quality and hydrobios of aquiculture water

Effects of photosynthetic bacteria(PSB) on the aquiculture water quality such as chemical oxygen consumption(COD),ammonia nitrogen(NH₄⁺-N),dissolved oxygen(DO) and pH were investigated.Besides,the effects of PSB on the composition of population of hydrobios including phycophyta and water bacteria were also estimated in our studies.The results showed that PSB could reduce the organic content and NH₄⁺-N,but raise the DO content.At the same time,the phycophyta biomass could be affected by the PSB.In 0.50% group and 1% group,the phycophyta biomass was increased obviously.The proportion of the bacillariophuta was occupied up to 26%;the proportion of the chlorophyta was amounted to 60%;whereas the proportion of the cyanophyta decreased by 10%.Moreover,the composition of water bacteria population in the aquaculture water was effected by the PSB,with the proportion of vibrio and aeromonas decreasing obviously.