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Effect of K~+ and the Interaction of Major Ions on Survival,Growth and ATP Enzyme Activity of Litopenaeus vannamei

ZHANG Li-tian  DAI Xi-lin  ZHANG Dong  
【摘要】:[Objective] On the basis of previous researches, this experiment aimed to analyze the effect of K+ and the interaction of K+, salinity(s), Ca2+, Mg2+ on growth and adenosine triphosphatase (ATPase), which was closely related to growth, of Litopenaeus vannamei. [Method] 5-week Litopenaeus vannamei breeding experiment was performed according to L16(215) orthogonal experiment design. Then the effect of K+ and the interaction of K+, salinity, Ca2+, Mg2+ in water on survival, growth and ATP enzyme activity of Litopenaeus vannamei. [Result] K+ had significant effect on survival rate, length and weight gain, ATP enzyme activity in Litopenaeus vannamei. The highest survival rate was at K+ of 150 mg/L. The fastest growth rate was at 50 mg/L, as well as the activities of Na+-K+-ATPase, Mg2+-ATPase, Ca2+-ATPase. The interaction of salinity, Ca2+, Mg2+, K+ in water also had significant effect on survival rate, length and weight gain, ATP enzyme activity in Litopenaeus vannamei. [Conclusion] Among the horizontal combinations of factors in the experiment, the optimal combination for Litopenaeus vannamei survival rate was salinity of 15, K+ of 150 mg/L, Ca2+ of 100 mg/L, Mg2+ of 300 mg/L, the optimal combination for growth rate was salinity of 15, K+ of 50 mg/L, Ca2+100 mg/L, Mg2+100 mg/L, the optimal combination for Na+-K+-ATPase, Mg2+-ATPase, Ca2+-ATPase activity in Litopenaeus vannamei was salinity of 5, K+ of 50 mg/L, Ca2+ of 100 mg/L, Mg2+ of 100 mg/L.

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