外源酶制剂对黄颡鱼稚鱼消化酶活性、消化率及粪便氮磷含量的影响Effects of Exogenous Enzyme Supplementation on Digestive Enzyme Activity, Apparent Digestibility and Fecal Nitrogen and Phosphorus Content of Juvenile Yellow Catfish
王国霞,孙育平,牛凤池,何飞,莫文艳,朱喜锋,曹俊明,黄燕华
摘要(Abstract):
在以鱼粉、豆粕、棉籽粕和双低菜籽粕为蛋白源的实用饲料中分别添加植酸酶1 000 IU/kg和复合酶制剂400 mg/kg,饲喂初始体质量为(1.02±0.01)g的黄颡鱼稚鱼56 d,探讨外源酶制剂对稚鱼消化酶活性、消化率及粪便氮、磷含量的影响。结果表明:与对照组比较,二实验组稚鱼胃蛋白酶活性均高于对照组(P<0.05),植酸酶组稚鱼肠道蛋白酶、胃淀粉酶活性高于对照组,差异有统计学意义(P<0.05)。植酸酶组稚鱼对饲料干物质、粗蛋白质、总能、灰分和磷表观消化率高于对照组,灰分和磷表观消化率也高于复合酶组,差异均有统计学意义(P<0.05);复合酶组稚鱼对饲料粗脂肪、总能表观消化率高于对照组,差异有统计学意义(P<0.05)。实验组稚鱼粪便氮含量与对照组均差异无统计学意义(P>0.05);植酸酶组稚鱼粪便磷含量低于对照组,差异有统计学意义(P<0.05)。在稚鱼实用饲料中添加植酸酶可提高消化道消化酶活性,提高其对饲料营养物质的表观消化率,减少粪便磷排放。
关键词(KeyWords): 植酸酶;复合酶;黄颡鱼;稚鱼;消化酶活;消化率;粪便氮、磷
基金项目(Foundation): 广东省海洋渔业科技与产业发展专项(A201401C03);; 2016年省级现代农业科技创新联盟建设(2016LM082,2016LM083)
作者(Author): 王国霞,孙育平,牛凤池,何飞,莫文艳,朱喜锋,曹俊明,黄燕华
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