氨氮对九孔鲍过氧化氢酶和超氧化物歧化酶活力的影响

通过测定不同氨氮条件下的九孔鲍内脏囊中的过氧化氢酶（CAT)和超氧化物歧化酶（SOD）活力，观察氨氮对九孔鲍CAT和SOD酶活力的影响，实验结果表明：不同氨氮浓度下的这两种酶活力不同，CAT活力随氨氮浓度的升降而变化，当氨氮浓度为3－4mg/L时，其活力高于对照组，当浓工增大至5－6mg/L时，CAT活力低于对照组；在氨氮为1－4mg/L时，SOD活力随氨氮浓度增大而上升，在4mg/L时达到最运，而当氨氮增至5－6mg/L时，SOD活力下降，不同温度下的氨氮浓度对九孔鲍的CAT和SOD酶活力变化有一定的影响。

Effects of ammonia-N on activities of CAT and SOD in Haliotis diversicolor supertexta

The activities of CAT and SOD and the effects of the activities of CAT and SOD under the different conditions of NH3-N in internal sac of Haliotis diversicolor supertexta were investigated. The results showed that the activities of CAT and SOD were different in the varying concentrations of NH3-N,and the activities of CAT declined with the increasing of the concentrations of NH3-N. When the concentrations of NH3-N was 1-4 mg/L, the activity of CAT was higher than that of the control group, and when 5-6 mg/L, the activity of CAT was lower than that of the control group, on the other hand, when the concentrations of NH3-N was 1-4 mg/L, the activities of SOD increased with the increasing of the concentrations of NH3-N, and when 4mg/L, the activities of SOD were maximum, and when 5 - 6mg/L, the activities of SOD declined. The activities of CAT and SOD of abalone also were affected by the concentrations of NH3-N at the different temperatures.