黄颡鱼对蝇蛆粉的表观消化率的研究

试验以三氧化二钇(Y2O3)为外源指示剂,采用"70%基础饲料+30%试验原料"的方法配制试验饲料,测定了初始体质量约为3.15 g的黄颡鱼(Peltobagrus fulvidraco)对蝇蛆粉的表观消化率。试验鱼养殖于室内循环水系统中,投喂试验饲料2周后,采用滤网捞取法收集粪便。结果显示,黄颡鱼对蝇蛆粉干物质、粗蛋白、粗脂肪、能量和总磷的表观消化率分别为80.35%、91.08%、71.59%、78.19%和67.12%。黄颡鱼对总氨基酸的表观消化率为95.53%,其中对丝氨酸的消化率最低,为82.58%,其他氨基酸的消化率均高于90%。结果表明,黄颡鱼幼鱼对蝇蛆粉干物质、蛋白质和氨基酸具有较高的消化吸收能力,这为评价蝇蛆粉的营养价值及其作为蛋白源在黄颡鱼饲料中的应用提供了相应的依据和参考。

Research of apparent digestibility of maggot meal for yellow catfish (peltobagrus fulvidraco)

The experiment was conducted to evaluate the apparent digestibility(AD) of dry matter(DM),crude protein(CP),crude lipid(CL),gross energy(GE),total phosphorus(TP) and amino acids of maggot meal(MM) for juvenile yellow catfish(peltobagrus fulvidraco) with an initial weight of 3.15 g,using a reference diet(RF) and test feedstuff(TF)(70% RF diet plus 30% of TF),containing yttrium oxide as an inert marker.The trial fish were fed with the test diets in indoor circulating system.After 2 weeks feeding period,faeces were collected with sieving by hands.The results showed that AD of DM,CP,CL,GE,and TP of MM were 80.35%,91.08%,71.59%,78.19% and 67.12%,respectively.The AD of total amino acids was 95.53%,and almost all of amino acids were higher than 90%,except the serine(82.58%).The experimental results indicate yellow catfish has relatively high digestion and absorption abilities for DM,CP and amino acids of MM.The results could provide reference data for evaluating the nutritional value of MM and exploiting artificial formulated feed for peltobagrus fulvidraco.