摘要
在基础饲料中分别添加0、0.75%、1.51%、2.26%、3.02%的Ca(H2PO4)2,使饲料中的可利用磷含量分别为0.62%、0.98%、1.1%、1.33%和1.71%,配制出5种等氮等能的饲料。以初始体重(1.80±0.30)g的军曹鱼为对象,在水族箱(300 L)中进行为期8周的摄食生长试验。结果显示,饲料中可利用磷水平从0.62%到1.33%之间各处理组军曹鱼特定生长率(SGR)无显著差异,表明饲料中0.62%的磷可满足军曹鱼生长需要。而当饲料可利用磷水平为1.71%时,军曹鱼SGR与其他处理相比显著下降(P<0.05)。体成分分析结果显示,全鱼脂肪含量随饲料磷水平上升而显著下降(P<0.05),全鱼粗灰分含量则与饲料磷水平呈正相关。
A feeding experiment was conducted to determine the requirement of dietary phosphorus for cobia in flow-through systems.Five practical diets were formulated to contain 0.62%,0.98%,1.10%,1.33% and 1.71% available phosphorus from ingredient and monocalcium phosphorus.Juvenile fish [ini tial average weight（1.80±0.30） g ]were randomly divided into 15 tanks of 20 fish,and fed one of 5 diets for 8 weeks.The results showed that specific growth rate（SGR） of fish fed the highest dietary phopho rus（1.71%） was significantly lower（P0.05） than other groups,while 0.62% dietary available phospho rus could meet the requirement for growth.The body composition analysis showed that the carcass ash and lipid were significantly affected by dietary available phosphorus（P0.05）.
出处
《饲料工业》
北大核心
2012年第24期28-31,共4页
Feed Industry
基金
国家自然基金项目[30271040]
关键词
军曹鱼
磷需求
生长
营养
cobia
phosphorus requirement
growth
nutrition
