晋城市丹河水体中氮利用细菌研究

目的]探讨丹河水体中氯利用菌的分布及生物多样性特征。方法]在丹河的赵庄断面水面下10～20cm深处采集水样（7次），采集时间为1年，微生物菌落按不同菌落特征分类计数，研究了丹河水体氮利用菌的数量分布和特征。结果]水体中固氮菌、氨化细菌、硝化细菌年平均数分别为140、1179和691CFU／ml，亚硝化和反硝化细菌年平均数分别为647和369MPN／ml。氮素转化菌在水体环境中的数量分布与季节、营养状况等有关，固氮菌主要受总氮影响较大，反硝化细菌主要受总氮和总磷的影响，固氮菌和硝化细菌的数量分布与反硝化细菌的数量分布均具有一定的一致性。结论]丹河水体中的氮利用菌中氨化细菌分布较多，硝化细菌、亚硝化细菌和反硝化细菌次之，固氮菌则相对较少。

Study on the Bacteria Utilizing Nitrogen in the Waterbody of Danhe River in Jingcheng City

Objective] The study aimed to explore and discuss the distribution and biodiversity characteristics of nitrogen utilizing bacteria in Danhe River water.Method] The water sample was collected in the deep of 10～20 cm under the water surface of Zhaozhuang section in Danhe for 7 times,the gathering time was 1 year,the microbial colonies were made for differential count according to the characteristics of different colonies,the amount distribution and characteristics of nitrogen utilizing bacteria in Danhe water were studied.Result] The annual mean value of azotobacter,ammonifiers and nitrobacteria in the river water were 140,1 179 and 691 CFU/ml resp.,the yearly average of nitrosation and denitrifying bacteria were 647 and 369 MPN/ml.The amount distribution of nitrogen cycle bacteria in water environment was related to season,nutrition status etc.,the azotobacteria was mostly affected by total nitrogen(TN),the denitrifying bacteria were mainly influenced by TN and total phosphorus(TP),the number distribution of azotobacteria and nitrobacteria had a certain coherence with that of denitrifying bacteria on number distribution.Conclusion] The ammonifiers in nitrogen utilizing bacteria in Danhe water was in much distribution,the nitrobacteria,nitrosation and denitrifying bacteria were at next and azotobacter was relatively less.