Phosphorus retention efficiency in rainbow trout fed diets with low fish meal and alternative protein ingredients
Phosphorus retention efficiency in rainbow trout fed diets with low fish meal and alternative protein ingredients
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DOI：
10.1111/j.1444-2906.2004.00844.x
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发表时间：
2004-08-01
影响因子：
1.9
通讯作者：
Watanabe, T
中科院分区：
文献类型：
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作者：
Hernández, A;Satoh, S;Watanabe, T
本研究以虹鳟鱼为对象，通过两个试验，研究了低磷蛋白源和低鱼粉含量的虹鳟鱼饲料对饲料品质和鱼体磷氮存留的影响。鱼粉（FM）饮食作为对照。试验鱼平均体重分别为2.0 g和134.7 g，试验期分别为30周和15周。试验日粮具有良好的生长率和饲料利用率。在第一个实验中，P的保留率较高的鱼喂养的测试饮食组（M和69%）相比，FM为基础的饮食（36%），N的保留率是相似的所有组。在第二个实验中，鱼被喂食在早期实验中具有最佳P保留的测试饮食。P保留低于在第一个实验中获得的值（较小的鱼），但仍高于组的鱼喂养低FM饮食与对照组相比（36.0%和22.2%，分别）。这表示对于试验和对照饮食，分别为5.9 kg/t和12.8 kg/t生产的P负载到水中。因此，虹鳟鱼的低磷负荷饲料可以通过替代蛋白质来源的适当组合来开发。
Two experiments were conducted to evaluate feed quality and body phosphorus (P) and nitrogen (N) retention by rainbow trout fed test diets with low amounts of fish meal content and alternative low-P protein sources. A fish meal (FM) diet was used as control. Fish weighing 2.0 g and 134.7 g on average were reared with the experimental diets for 30 weeks and 15 weeks, respectively. The experimental diets had a good growth rate and feed utilization. In the first experiment the P retention was higher in the group of fish fed test diets (M and 69%) compared to the FM-based diet (36%); N retention rates were similar for all groups. In the second experiment, fish were fed the test diet that had the best P retention in the earlier experiment. The P retention was lower than the values obtained in the first experiment (smaller fish), but still higher in the group of fish fed the low FM diet in comparison with the control group (36.0% and 22.2%, respectively). This represents a P loading into the water of 5.9 kg/t and 12.8 kg/t production for the test and the control diet, respectively. Therefore, low-P-loading diets for rainbow trout can be developed through the appropriate combination of alternative protein sources.