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饲料糖脂比对方格星虫稚虫生长、体成分和消化酶活性的影响

DOI: 10.3969/j.issn.1006-267x.2014.01.020

Keywords: 方格星虫稚虫,糖脂比,生长,体成分,消化酶活性

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Abstract:

本试验旨在研究饲料糖脂比对方格星虫稚虫生长、体成分和消化酶活性的影响。配制5种不同糖脂比(0.68、1.02、1.62、2.61和4.35)的等氮等能饲料,分别饲喂初始体重为(16.77±0.40)mg的5组方格星虫稚虫8周。每组3个重复,每个重复400条。结果表明:饲料糖脂比对方格星虫稚虫的成活率没有显著影响(P>0.05),对增重率和特定生长率有显著影响(P<0.05)。方格星虫稚虫的增重率和特定生长率随饲料糖脂比的增大先升后降,当饲料糖脂比为2.61(糖含量为20.64%,粗脂肪含量为7.92%)时,方格星虫稚虫的增重率和特定生长率最高,分别为451.78%和3.41%/d。饲料糖脂比对虫体水分、粗蛋白质和粗脂肪含量均有显著影响(P<0.05),而对虫体粗灰分含量没有显著影响(P>0.05)。当饲料糖脂比为4.35(糖含量为24.56%,粗脂肪含量为5.64%)时,水分、粗蛋白质含量最高,粗脂肪含量最低,并与饲料糖脂比为0.68(糖含量为10.48%,粗脂肪含量为15.43%)时有显著差异(P<0.05)。饲料糖脂比对淀粉酶和脂肪酶活性有显著影响(P<0.05),对蛋白酶活性无显著影响(P>0.05)。以增重率为评价指标,经回归分析得出方格星虫稚虫饲料中最适糖脂比为2.42。

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