碳酸盐碱度对鱼类毒性作用的研究

STUDY ON THE TOXICITY OF CARBONATE-ALKALINE TO FISHES

本文报道了1980—1981年所进行的碱度对鱼类毒性的研究结果,探讨了碱度各成分的作用及相互关系。碱度(A)和 pH值对鱼类的致死作用存在着相互影响的作用,其24小时半致死关系方程为:pH=(10.00±0.038)-(0.0149±0.0007)A,(N=25,r=O.976,s=O.101)。在所进行的实验条件下,CO_3^- 对鲢鱼的24小时 TLm 值为 12.4me/l。碱度致毒是综合性作用,除主要因子 CO_3^-外,不同 pH区间还有OH^-、CO_2 和盐度等因子起协同作用。据研究结果,作者认为碱度 10me/l可以作为鲢、鳙鱼养殖用水的危险指标。

This paper reports the results of experiments on the toxicity of alkaline to fishesin 1980--1981. The effects of different composition of alkaline as well as their internalrelationship in causing toxicities are discussed.It is noticed that alkaline (A) and pH are interdependent in producing the toxica-tion on fishes. The relationship of the 24h TLm is pH = (10.00+0.038)-(0.0149+0.007) A(n = 25,r= -0.976, s=0.101). Under the experimental condition, CO_3^- 24hTLm to silver carp(Hypophthalmichthys molitrix) is 12.4me/L. Besides CO_3^-,the majormortality factor, OH^-, CO_2^- and salinity also participate in synergism on different pHintervals. Therefore, alkalinity 10me/L may be taken as the danger index for waterquality in culturing silver carp and bighead carp (Aristichthys nobilis).