大口黑鲈对饲料中蛋氨酸需求量的评定

被引：29

作者：

陈乃松

马建忠

周恒永

周洁

仇小洁

靳利娜

林丽芳

机构：

[1] 上海海洋大学水产与生命学院

来源：

水产学报 | 2010年 / 34卷 / 08期

关键词：

大口黑鲈; 蛋氨酸需求量; 生长; 体组成; 非特异性免疫;

D O I：

暂无

中图分类号：

S963 [水产动物饵料及其营养];

学科分类号：

090502 ;

摘要：

为了评定大口黑鲈对饲料中蛋氨酸的最适需求量,配制了蛋氨酸含量分别为0.61%,0.82%,0.98%,1.21%,1.42%和1.59%的6水平等氮等能饲料(44.39%粗蛋白质,0.30%胱氨酸,19.81kJ/g总能),以初始体重为(37.88±0.40)g的大口黑鲈为试验对象,进行了66d的饲养试验。饲养试验在室内循环水养殖系统中进行,每饲料处理设3个重复,每重复放养试验鱼25尾。饲养试验采取表观饱食投喂,每天投喂两次(8:30和15:30)。试验期间水温(27±1)℃,溶解氧6mg/L以上。结果表明,试验鱼的特定生长率、饲料效率、蛋白质效率、蛋白沉积率随着饲料中蛋氨酸水平从0.61%到1.21%的升高而显著提高(P<0.05),此后则呈降低的趋势。饲料中蛋氨酸水平对全鱼和肌肉中粗蛋白含量有显著影响(P<0.05);但各组间水分、粗脂肪和粗灰分含量差异不显著(P>0.05)。0.61%蛋氨酸的饲料组的肝体比和脏体比显著大于其他组(P<0.05),其他组间无显著差异(P>0.05)。饲料中蛋氨酸水平显著影响血清溶菌酶活力,头肾白细胞吞噬活性及其呼吸爆发活性(P<0.05)。以特定生长率为评价指标经二次回归分析得出,当饲料中的胱氨酸占饲料蛋白质的0.68%时,大口黑鲈对饲料中蛋氨酸的最适需求量为1.22%,占饲料蛋白质的2.75%。

引用

页码：1244 / 1253

页数：10

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