植酸酶对黄金鲫生长、饲料利用和体成分的影响  

Effects of phytase on growth, feed utilization and body composition of Carassius auratus

作　　者：李萌[1] 王桂芹[1] 

机构地区：[1]吉林农业大学动物科学技术学院,吉林长春130118

出　　处：《饲料工业》2015年第6期15-18,共4页Feed Industry

基　　金：国家自然科学基金[31372540];世行贷款项目[2011-YS11]

摘　　要：试验旨在研究植物性饲料中添加不同梯度的中性植酸酶对黄金鲫（Carassiusauratus）生长、饲料利用和体成分的影响。以初始体质量为（10．71±0．16）g的黄金鲫幼鱼为研究对象，对照组添加磷酸二氢钙，试验组添加中性植酸酶，梯度依次为：0、300、600、900、1200U／kg，每组有3个平行组，饲养期60d。结果表明：随着饲料植酸酶水平的增加，各试验组黄金鲫特定生长率、饲料效率、蛋白质效率和肌肉蛋白质含量不断增加、饲料系数降低。当饲料植酸酶水平增加到900U／kg（4组）时，与对照组相比差异不显著（P〉0．05）。当饲料植酸酶水平增加到600U／kg（3组）时，黄金鲫蛋白质生产率升高、肌肉脂肪降低，且与对照组相比差异不显著（P〉0．05）。在本试验条件下，以特定生长率和蛋白质效率为评定指标，植物性黄金鲫饲料中植酸酶的适宜添加量为600～900U／kg。The experiment was conducted to study the effects of phytase levels in diet on growth perfor- mance,feed utilization and body composition of Carassius auratus. With an average weight of （10.71± 0.16） g, Carassius auratus were randomly divided into 6 treatments with 3 replicates per treatments, while calcium dihydrogen phosphate was added in the control group. The test groups were supplement- ed with different levels of phytase （0, 300, 600, 900, 1 200 U/kg）. The trial period was 60 days. The results showed a marked increase in the specific growth ratio, the feed efficiency, the protein efficiency ratio and the protein productivity of Carassius auratus（600-900 U/kg）, and significant reduce of the feed conversion ratio and the muscle fat（600-900 U/kg）. According to the test results, based on specif- ic growth rate and protein efficiency ratio, the appropriate additive scope of phytase is 600-900 U/kg.

关 键 词：植酸酶 黄金鲫 生长 饲料利用 体成分 

分 类 号：Q946[生物学—植物学]