动物营养学报2016，Vol.28Issue(6)：1710-1719,10.DOI:10.3969/j.issn.1006-267x.2016.06.011
中性植酸酶部分替代磷酸二氢钙对异育银鲫生长性能、体成分及磷利用率的影响
Effects of Partial Replacing Monocalcium Phosphate with Neutral Phytase on Growth Performance, Body Composition and Phosphorus Utilization of Carassius auratus gibelio
摘要
Abstract
An 8-week feeding trial was conducted to study the effects of partial replacing monocalcium phosphate (MCP) with neutral phytase on growth performance,body composition,serum biochemical parameters and phosphorus utilization of Carassius auratus gibelio.Seven groups were designed in this experiment,there were D1 (the positive control group,1.5％ MCP),D2 (the negative control group 1,1.0％ MCP),D3 (1.0％ MCP+400 U/kg neutral phytase),D4 (1.0％ MCP+800 U/kg neutral phytase),D5 (the negative control group 2,0.5％ MCP),D6 (0.5％ MCP+400 U/kg neutral phytase) and D7 groups (0.5％ MCP+ 800 U/kg neutral phytase).Each group had 3 replicates and each replicate had 25 fish with the initial average body weight of (23.39±0.10) g.The results showed as follows:after the 8-week feeding trial,the D5 group showed the worst growth performance,and the weight gain rate,specific growth rate and feed intake in D5 group were significantly lower than those in the D1 group (P＜0.05),while the feed conversion ratio was significantly higher than those in the other groups (P＜0.05).The weight gain rate and specific growth rate in D2 and D6 groups were significantly lower than those in D1 group (P＜0.05),while the feed conversion ratio was significantly higher than that in the D1 group (P＜0.05).All growth performance indices in D3,D4 and D7 groups had no significant differences compared with D1 group (P＞0.05).The moisture,crude protein,ash and phosphorus contents of whole body,and serum cholesterol content and alkaline phosphatase activity had no significant differences among the all groups (P＞0.05).Serum phosphorus and tdglyceride contents,in addition to the D5 group,showed no significant difference between the rest groups (P＞0.05).At the same supplemental level of MCP,the phosphorus retention ratio and apparent digestibility in neutral phytase supplementation groups were significantly higher than those in no neutral phytase supplementation groups (P＜0.05),while the phosphorus discharge was opposite (P＜0.05).The present study suggests that when the diet is supplemented 400 and 800 U/kg of phytase,the MCP level can be reduced by 0.5％ and 1.0％,respectively,without affecting the growth performance,body composition and serum biochemical parameters of Carassius auratus gibelio.Neutral phytase partial replacing MCP in Carassius auratus gibelio diet can improve the utilization of phosphorus and reduce the phosphorus discharge,thus brings economical and ecological benefits.关键词
异育银鲫/中性植酸酶/磷酸二氢钙/生长性能/体成分/磷利用率Key words
Carassius auratus gibelio/neutral phytase/monocalcium phosphate/growth performance/body composition/phosphorus utilization分类
农业科技引用本文复制引用
曾晓霭,徐树德,陈清华,轩岩俊,赵青海..中性植酸酶部分替代磷酸二氢钙对异育银鲫生长性能、体成分及磷利用率的影响[J].动物营养学报,2016,28(6):1710-1719,10.基金项目
“十二五”农村领域国家科技计划课题——新型饲料用酶制剂创制与应用及安全高效饲料添加剂创制与应用(2013BAD10B00) （2013BAD10B00）
湖南农业大学技术开发合作项目——酶制剂应用效果评估技术体系的研究(13118) （13118）
