Utilization of combined extruded soybean and corn gluten meals as feed ingredients for juvenile rainbow trout, Oncorhynchus mykiss diet
Utilization of combined extruded soybean and corn gluten meals as feed ingredients for juvenile rainbow trout, Oncorhynchus mykiss diet
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利用联合挤压大豆和玉米蛋白粉作为虹鳟幼鱼饲料成分，Oncorhynchus mykiss 饮食
DOI：
10.1111/are.14731
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发表时间：
2020
影响因子：
2
通讯作者：
S.Satoh
中科院分区：
文献类型：
--
作者：
R.Santizo-Taan;Y.Haga;S.Satoh
本研究通过饲养试验和消化率试验，探讨了挤压豆粕和玉米蛋白粉作为虹鳟鱼幼鱼饲料成分的利用情况。将植物成分在低温（100°C，LT）或高温（150°C，HT）下挤出30秒。四个等氮（44%，粗蛋白）和等脂（14%，粗脂肪）的饮食配方。对照饲料以鱼粉为基础，NE饲料为非挤压SBM和CGM组合（1：1），LT饲料为LT SBM和LT CGM，HT饲料为HT SBM和HT CGM。240尾虹鳟幼鱼（平均体重7.8 g）随机分为12个矩形60 L玻璃水族箱，提供4种不同的饲料，一式三份。每天喂鱼两次，每周六天，连续12周。挤压蒸煮降低了膨化原料植酸中的磷含量。饲喂HT饲料的鱼的最终重量、增重、SGR和PER显著（p<0.05）高于饲喂NE饲料的鱼。LT和HT日粮蛋白质的表观消化率显著高于NE日粮。本研究的结果表明，高温挤压SBM和CGM是合适的饲料成分，虹鳟鱼的饮食不影响鱼的生长，饲料利用率和鱼的身体组成。
In this study, feeding experiment and subsequent digestibility trial were performed to investigate the utilization of extruded soybean meal (SBM) and corn gluten meal (CGM) as feed ingredients for juvenile rainbow trout. Plant ingredients have undergone extrusion at low temperature (100°C, LT) or high temperature (150°C, HT) for 30 s. Four isonitrogenous (44%, crude protein) and isolipidic (14%, crude lipid) diets were formulated. Control diet is fishmeal based while a combined (1:1) non‐extruded SBM and CGM for NE diet, LT SBM and LT CGM for LT diet and HT SBM and HT CGM for HT diet. Two hundred forty rainbow trout juveniles (7.8 g average body weight) were randomly divided into 12 rectangular 60 L glass aquaria and offered four different diets in triplicate. Fish were fed at satiation twice a day, six days a week for 12 weeks. Phosphorus in phytic acid level of extruded ingredients decreased through extrusion cooking. Final weight, weight gain, SGR and PER of fish fed HT diet were significantly (p< .05) higher than those fed with NE diet. Apparent digestibility coefficient for protein of LT and HT diets is significantly higher than of NE diet. The results of this study demonstrated that HT extruded SBM and CGM are suitable feed ingredients for rainbow trout diet without compromising fish growth, feed utilization and fish body composition.