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采用寇氏法研究盐度、碱度对泥鳅的急性毒性作用,观察泥鳅对不同药剂的毒性反应及症状。试验结果表明,盐度对泥鳅24、48、72、96 h的半致死质量浓度分别为15.1、14.8、14.4、13.9 g/L,其安全质量浓度是4.3 g/L;碱度对泥鳅24、48、72、96 h的半致死质量浓度分别为10.3、9.0、7.9、6.6 g/L,其安全质量浓度是2.1 g/L。利用均匀设计法对盐碱的联合毒性进行了试验设计,对试验数据进行多元线性全回归分析表明:碱度的毒性作用强于盐度,盐碱联合毒性在不同时期均表现为拮抗作用。利用盐碱地和咸水进行养殖泥鳅具有较好的前景。
Kou’s method was used to study the acute toxic effects of salinity and alkalinity on loach and the toxicity and symptoms of loach to different medicaments were observed. The results showed that the LC50 of salinity to loach at 24, 48, 72 and 96 h were 15.1, 14.8, 14.4 and 13.9 g / L, respectively. The safe concentration of salinity was 4.3 g / The lethal mass concentrations at 48, 72 and 96 h were 10.3, 9.0, 7.9 and 6.6 g / L, respectively. The safe mass concentration was 2.1 g / L. The uniform design method was used to test the combined toxicity of saline and alkali. The multivariate linear total regression analysis of the experimental data showed that the alkalinity toxicity was stronger than salinity, and the combined salinity and alkalinity toxicity showed antagonism in different periods. The use of saline soil and salt water culture loach has a good prospect.