【摘要】 通过单因子静态急性毒性试验和正交设计法,研究水环境中Ca²⁺、Mg²⁺、Ca²⁺+Mg²⁺总量及Ca²⁺/Mg²⁺比值对凡纳滨对虾存活及生长的影响。结果表明:（1）凡纳滨对虾48h的Ca²⁺的LC₅0为407.38mg·L^-1、Mg²⁺的LC₅₀为741.31mg·L^-1。（2）在Ca²⁺/Mg²⁺比值为1:10时,对凡纳滨对虾生存没有影响;（3）凡纳滨对虾的生长与Ca²⁺浓度有密切关系,其值过高或过低均会影响凡纳滨对虾的生长;在Ca²⁺/Mg²⁺比值为1:3时,凡纳滨对虾生长和存活率随着Ca²⁺+Mg²⁺质量浓度的增加而上升,但达到一定质量浓度后,又随着Ca²⁺+Mg²⁺质量浓度的继续增加而下降。更多还原

【Abstract】 Single-factor acute toxicity test and orthogonal design were used to study the effect of the concentrations of Ca²⁺ and Mg²⁺, Ca²⁺+ Mg²⁺ and Ca²⁺/Mg²⁺ on survival and growth of P. vannamei. The results show that （1） The LC₅₀ of P. vannamei with Ca²⁺ is 407.38 mg" L^-1 in 48 hour, while the LC₅₀ with Mg²⁺ is 741.31 mg·L^-1. （2） When Ca²⁺/Mg²⁺ equals 1 : 10, the survival of shrimp is not affected. （3） The growth of P. vannamei has close relation with the concentration of Ca²⁺ , which would affect the growth of P. vannamei, whether it is high or low. When Ca²⁺/Mg²⁺ equals 1:3, the growth and survival rate will rise with the qualitative increasing concentration of Ca²⁺+ Mg²⁺. When it reaches a certain degree, those rates will descend with the increasing concentration.更多还原