4种常用杀菌消毒剂对养殖水体中硝化细菌生长的影响

[目的]为调节和改善养殖微生态环境平衡和合理用药提供科学依据。[方法]以分离自养殖水体的硝化细菌为试验材料,运用生态毒理学的方法,在实验室条件下研究常用杀菌剂二氧化氯、高锰酸钾、甲醛、硫酸铜与硫酸亚铁合剂对其生长的影响。[结果]0.1mg/L二氧化氯、0.6 mg/L高锰酸钾、20 mg/L甲醛、0.7 mg/L硫酸铜与硫酸亚铁(5∶2)合剂对硝化细菌生长的影响较小,同时对水体中的病原微生物有较好的防治效果。[结论]在水产养殖中,应选用适宜浓度的杀菌剂对水体进行消毒。

Effect of Four Kinds of Common Bactericides on the Growth of Nitrifying Bacteria in Aquacultural Water

[Objective] The research aimed to provide scientific basis for adjusting and improving the balance of aquaculture micro-ecosystem and the reasonable application of drugs.[Method] Using nitrifying bacteria isolated from aquaculture water as test materials,the effects of common bactericides ClO2,KMnO4,formaldehyde,the mixture of copper sulfate and ferrous sulfate by the ratio of 5∶2 on the growth of nitrifying bacteria under the laboratory conditions were studied by the ecotoxicology method.[Result] 0.1 mg/L ClO2,0.6 mg/L KMnO4,20 mg/L formaldehyde,0.7 mg/L mixture of copper sulfate and ferrous sulfate by the ratio of 5∶2 had small effects on the growth of nitrifying bacteria and better control effects on aquatic pathogenic microorganism in water body.[Conclusion] In the aquiculture,suitable concentration of bactericides should be used to disinfect the water body.