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首页> 外文期刊>Aquaculture >Partial replacement of fish meal by cottonseed meal and soybean meal with iron and phytase supplementation for parrot fish Oplegnathus fasciatus
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Partial replacement of fish meal by cottonseed meal and soybean meal with iron and phytase supplementation for parrot fish Oplegnathus fasciatus

机译：棉籽粉和豆粕用铁和植酸酶补充部分替代鱼粉，用于鹦鹉鱼Oplegnathus fasciatus

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Two consecutive feeding trials were conducted to determine the optimum dietary level of the cottonseed and soybean meal (CS) for replacement of fish meal (FM) in diets for juvenile and ongrowing parrot fish with or without iron and phytase. In experiment I, juvenile parrot fish (BW: 3.17 g) were fed one of six experimental diets for 12 weeks which were formulated to replace FM protein by equal proportion (1:1, w:w) of CS at 0, 10, 20, 30, 40, or 50% (designated as CS0, CS10, CS20, CS30, CS40, or CS50, respectively). In experiment II, ongrowing parrot fish (BW: 55 g) were fed one of five experimental diets for 9 weeks. The experimental diets were formulated to replace FM protein by CS at 0, 20, or 30% (designated as CS0, CS20, or CS30, respectively) and to include ferrous sulfate (0.1 and 0.2%) and phytase into the CS20 and CS30 diets (CS20+Fe&P and CS30+Fe&P, respectively). Results from the two feeding trials indicated that the CS could replace up to 20% FM protein in diets for juvenile parrot fish (3-22 g) and up to 30% in ongrowing (55-120 g) parrot fish. The supplemental effect of iron and phytase was not significant on growth performance. Total or each gossypol enantiomer concentration in the liver increased as the level of dietary cottonseed meal increased. However, gossypol in the liver of fish fed diets supplemented with iron was not detected. The dietary supplementation of CS significantly reduced the levels of plasma triacyglycerols and total cholesterol. The present study indicates that plant protein sources are better utilized in larger fish, and that up to approximately 30% FM protein could be replaced by CS with iron and phytase in the presence of supplemental lysine and methionine.
机译：进行了两个连续的饲喂试验，以确定棉籽和豆粕（CS）的最佳饮食水平，以替代有或没有铁和植酸酶的幼鱼和长尾鹦鹉鱼的日粮中的鱼粉（FM）。在实验一中，给幼稚鹦鹉鱼（体重：3.17克）喂食六种实验饲料之一，持续12周，配制成以0、10、20的CS等比例（1：1，w：w）代替FM蛋白，30％，40％或50％（分别指定为CS0，CS10，CS20，CS30，CS40​​或CS50）。在实验II中，将生长中的鹦鹉鱼（体重：55 g）喂食五种实验饮食之一，持续9周。配制实验日粮以用0、20或30％的CS代替FM蛋白（分别指定为CS0，CS20或CS30），并将硫酸亚铁（0.1％和0.2％）和植酸酶加入CS20和CS30日粮中（分别为CS20 + Fe＆P和CS30 + Fe＆P）。两次饲喂试验的结果表明，CS可以替代幼鹦鹉鱼（3-22克）日粮中高达20％的FM蛋白，而成年鹦鹉鱼（55-120 g）中日粮可以替代30％。铁和植酸酶对生长性能的补充作用不明显。肝脏中总棉酚或每种棉酚对映体的浓度随日粮棉籽粉含量的增加而增加。但是，未检测到饲喂铁补充饮食的鱼肝中的棉酚。膳食补充CS可以显着降低血浆三酰甘油和总胆固醇的水平。本研究表明，在较大的鱼类中可以更好地利用植物蛋白，在补充赖氨酸和蛋氨酸的情况下，高达约30％的FM蛋白可以被铁和植酸酶替代为CS。

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