鱼粉水解物中小肽对幼龄草鱼生长性能的影响

The effect of small peptides in hydrolytic fish meal on growth performance of grass carp Ctenopharyngodon idella

用150尾3.74±0.23 g的草鱼作日粮中鱼粉水解物中小肽对幼龄草鱼生长性能影响研究。实验分为2 组,每组75尾鱼,每25尾鱼饲于0.25m3的水族箱中,每组设3个平行水族箱。试验组日粮中添加0.5%鱼粉水解物+0.5%鱼粉,对照组为1%鱼粉,试验期56 d。结果表明,试验组草鱼其特定生长率、蛋白保留效率、饲料系数和血浆中镁含量与小肽总量均显著高于对照组(P<0.05)。草鱼日粮中添加一定比例的鱼粉水解物小肽可提高饲料表观消化率和蛋白消化率,增加血液循环中生物活性肽的含量,增加体内氮沉积,减少肝胰脏和肠系膜脂肪储积,从而提高机体对日粮中蛋白质的利用率。

150 grass carps with 3.74 ± 0.23g were used in an experiment on the effect of small peptides in hydrolytic fish meal on growth performance of grass carp Ctenopharyngodon idella. The grass carps were divided into two groups and fed in 2 × 3 aquatic cases (0.25m3/25 grass carps) for 56 days. The diets of test group included 0.5% hydrolyzic fish meal + 0.5% fish meal and control group 1 % fish meal. The experiment indicated that the specific growth rates(SGR), feed modulus(FM), protein reservation rate (PRR), contents of magnesium and small peptides in blood plasma on grass carps in test group were significantly higher than those in control group( P < 0. 05). These results indicated that hydrolytic fish meal as small peptides could improve the apparent digestibility and protein digestibility and increase the total amount of small peptides in blood circulation and the sediment of nitrogen in body, thus reducing the store of fat in hepatopancreas and mesentery, and thereby advancing the utilization of amino acids in diet.