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介绍了用叉尾仔鱼饲喂含Na2 SeO3 、蛋氨酸硒和酵母硒各 0 ,0 .0 2 ,0 .0 6 ,0 .2 0和 0 .0 4mg的酪蛋白纯化日粮 ,9周所获得的鱼体重和谷胱甘肽过氧化酶的活性服从回归分析曲线。由此可推断叉尾对不同硒源的需求量和相对生物学活性。拐点分析表明 :叉尾对日粮中Na2 SeO3 、蛋氨酸硒和酵母硒的最小需求量分别为 0 .2 8,0 .0 9和 0 .11mg/kg ,而对于谷胱甘肽过氧化物酶的活性则要求分别为 0 .17,0 .12和 0 .12mg/kg日粮。就促生长而言 ,蛋氨酸硒和酵母硒相对于Na2 SeO3的相对生物学活性分别为 336和 2 6 9,而对于谷胱甘肽过氧化物酶的活性而言则分别是 14 7和 14 9。蛋氨酸硒和酵母硒在肝脏和肌肉中硒的沉积明显高于Na2 SeO3 的硒源。研究表明 ,在日粮中用蛋氨酸硒和酵母硒代替无机硒可明显减少硒的添加量
The casein diet with Na2SeO3, methionine selenium and yeast selenium was fed with 0,0.02, 0.06,0.2,0 and 0,04 mg of dietary protein purified diet, with 9 weeks of feeding The body weight and glutathione peroxidase activity obtained obey the regression analysis curve. From this, it can be inferred that the demand and relative biological activity of different selenium sources for the tail sewer. The inflection point analysis showed that the minimum requirement of the tail fish for dietary Na2 SeO3, selenium methionine and yeast selenium was 0.28, 0.99 and 0.11 mg / kg, respectively, while for glutathione peroxides Enzyme activity was required to be 0.17,0 .12 and 0.12mg / kg ration. The relative biological activity of methionine selenium and yeast selenium relative to Na2 SeO3 for growth was 336 and 269, respectively, and for glutathione peroxidase 14 and 14, respectively . The deposition of selenium methionine and yeast selenium in the liver and muscle was significantly higher than that of Na2 SeO3. Studies have shown that in the diet with methionine selenium and yeast selenium instead of inorganic selenium can significantly reduce the amount of selenium added