中文摘要：

研究了某运河水中的致嗅微生物，发现引起嗅味的微生物主要是颤藻类，同时还含有少量螺旋藻、鱼腥藻、微囊藻类，pH=5．5的时候有利于微囊藻生长，pH：7和8．5的时候有利于颤藻、螺旋藻的生长，明显碱性环境更有利于颤藻的生长。颤藻对水的致嗅作用是四种藻类中最明显的，喜欢在酸性环境下生长的微囊藻的致嗅作用最不明显。可以控制水体成偏酸性环境，延缓致嗅物的产生。致嗅微生物培养大约10天会达到一个峰值，培养前7天致嗅微生物会成指数的增长，随后放缓，达到一个极值。

英文摘要：

The paper researches the caused sniff microorganisms in the water of a southern canal, such as mainly Oscillatoria, less Spirulina,Anabaena,Microeystis. Under the experimental condition of pH = 5.5, there is conductive to the growth of the Microcystis. Under pH = 7 and pH = 8.5, Oscillatoria, and Spirulina growed more fastly. Obviously, weak alkali conditions help to the growth of Oscillatoria and cause more odorant, while weak acid conditions promote the growth of Microcystis so as to cause less odorant. The training of sniff microorganism can achieve to summit over almost ten days, in first seven days increasing exponential- ly, and then slowly reach a balance.