刘征威(1983- )，男，硕士研究生，研究方向为功率电子变换技术，ldwnuaa2@yahoo.com.cn； 陈 新(1973- )，男，博士，副教授，研究方向为功率电子变换技术、航空电源； 作者联系信息： 姓名：刘征威 联系电话（手机）：15850556896 Email地址： ldwnuaa2@yahoo.com.cn
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在水温28.5℃,采用实验生态学方法研究了不同盐度、pH条件下氨氮对管角螺(Hemifusustuba)稚贝[壳高(11.3±0.11)mm,n=30]毒性的影响。结果表明,(1)盐度对氨氮的毒性有较大影响,随着盐度的降低,氨氮在水体中的毒性增强;盐度为16、19、23和28,总氨氮对稚贝的96h半数致死浓度(96hLC50)分别为36.5、43.7、52.6和58.8mg/L,安全浓度(SC)为3.7、4.4、5.3和5.9mg/L。(2)氨氮在水体中的毒性随pH的升高而增强,pH为7.6、8.0、8.4和8.8时,总氨氮对稚贝的96hLC50依次为58.3、54.5、50.6和20.2mg/L,对应的SC依次为5.8、5.5、5.1和2.0mg/L。氨氮在pH8.8时对稚贝的96hLC50急剧下降,其毒性是在pH7.6时的2.9倍。
In this paper,under water temperatures 28. 5℃ ,the toxic effects of ammonia to Hemifusus tuba juveniles ( shells high 11. 3 ± 0. 11 mm,n = 30 ) were studied at different pH and salinity with ecological method. The result showed that salinity has significantly effect on the toxicity of ammonia. The toxicity of ammonia in water became stronger when the salinity was lower. When salinity was 16,19,23 and 28 respectively,the 96hLC50 of total ammonia to H. tuba juveniles were 36. 5,43. 7,52. 6 and 58. 8 mg /L respectively,and equivalent the safe concentration (SC) of total ammonia to the juveniles were 3. 7,4. 4,5. 3 and 5. 9 mg /L,respectively. The toxicity of ammonia in water became stronger in higher pH than in lower. The 96hLC50 and the SC of total ammonia to H. tuba juveniles were 58. 3,54. 5,50. 6,20. 2 mg /L and 5. 8,5. 5, 5. 1 and 2. 0 mg /L,respectively. The 96hLC50 of total ammonia to H. tuba juveniles fell rapidly when pH was 8. 8,and toxicity of ammonia in water became 2. 9 times higher than in pH 7. 6.
引用本文
罗杰,杜涛,刘楚吾,陈加辉.2010.不同盐度、pH条件下氨氮对管角螺稚贝毒性影响.动物学杂志,45(3):102-109.
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- 收稿日期:2009-11-19
- 最后修改日期:2010-02-04
