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探讨次氯酸钙和二氯异氰尿酸钠两种代表性含氯消毒药物,为含氯消毒剂应用于细菌性虾病的防治提供理论依据。实验表明:有效氯在海水中的丧失随温度上升、pH值下降而加速。常见对虾病原菌对有效氯非常敏感,有机物增加、pH值上升使杀菌率下降。两种药物对实验中国对虾的48h半致死浓度为2.74～2.88mg/L有效氯。长期施以高于安全浓度的药物对实验虾之存活率、增长率等指标无不良影响,施药组发病率远远低于对照组。
To investigate two representative chlorine-containing disinfectants, calcium hypochlorite and sodium dichloroisocyanurate, to provide a theoretical basis for the prevention and treatment of bacterial shrimp diseases using chlorine-containing disinfectants. Experiments show that the loss of available chlorine in seawater increases with temperature and pH decreases. Common shrimp pathogens are very sensitive to available chlorine, organic matter increases, the pH value increases so that the sterilization rate decreased. The 48h LC50 of the two drugs on experimental P. chinensis was 2.74 ~ 2.88 mg / L available chlorine. Long-term higher than the safe concentration of drugs on the survival rate of experimental shrimp, growth rate and other indicators without adverse effects, the incidence of drug group is much lower than the control group.