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通过测定全血红蛋白和高铁血红蛋白及耗氧率，研究了草鱼种在NO－N作用下的生理变化和对NO－N的适应性,结果表明：ρ（NO－N）在O～4mg·L－1范围内可使草鱼种耗氧率增加，并于1mp·L－1和4mg·L－1处出现峰值和次峰值；经暴露处理的鱼种在恢复21d后，显示出对NO-N的适应性．
The physiological changes of grass carp under the action of NO-N and the adaptability to NO-N were studied by measuring the total hemoglobin, methemoglobin and oxygen consumption rate. The results showed that ρ (NO-N) 1, the oxygen consumption rate of grass carp increased, and the peak and sub-peak appeared at 1mp · L-1 and 4mg · L-1. After exposure for 21d, the species of NO-N Adaptability.