动物营养学报Issue(12)：3698-3706,9.DOI:10.3969/j.issn.1006-267x.2014.12.020
幼鱼和育成鱼阶段团头鲂对饲料中脂肪的需要量
Dietary Lipid Requirements of Blunt Snout Bream (Megalobrama amblycephala) in Juvenile and Premature Stages
摘要
Abstract
This experiment was to estimate the dietary lipid requirements of blunt snout bream ( Megalobrama amblycephala) in two growth stages ( juvenile and premature stages) under the same formula system. Six semi-purified diets were formulated, casein and imported fish meal were used as protein source, and soybean oil and soybean lecithin were used as lipid source. The experimental diets were designed under the same protein content ( crude protein content was 30%) condition, and contained a total of 6 gradient dietary lipid levels such as 3.06%, 4.38%, 5.89%, 7.45%, 8.78% and 10.13% ( measrued values) , respectively. Juvenile and prema-ture stage trials used blunt snout bream with the initial average body weight of ( 34. 98 ± 0.47) g/fish and (102.05±2.31) g/fish as experiment animals, respectively. The fish in the juvenile and premature stage trials were fed the experimental diets with different lipid levels in pond cage for 85 and 56 days, respectively. Under the same growth stage, each diet as a group, and each group had 4 replicates with 20 fish in each replicate. The results showed as follows:with the dietary lipid level increasing, the weight gain rate ( WGR) and protein efficiency ratio ( PER) of blunt snout bream in two growth stages were firstly increased and then decreased, and both of them had the highest WGR and PER when dietary lipid level was 8.78%, while the feed conver-sion ratio ( FCR) was firstly decreased and then increased, and both of them had the lowest FCR when dietary lipid level was 8.78%. Under the same formula system, the crude protein content in whole-body of blunt snout bream showed juvenile stage>premature stage, while the crude lipid content showed premature stage>juvenile stage. With the dietary lipid level increasing, the crude protein content in whole-body of blunt snout bream in two growth stages showed a trend of firstly increased and then decreased, while the crude lipid content was continually increased, and there was a position correlation between dietary lipid level and crude lipid content in whole-body. WGR, PER and FCR are used as evaluating indicators for regression analysis, the results show that the dietary lipid requirements of blunt snout bream in juvenile and premature stages are 8.18% to 8.89%and 9.03% to 9.47%, respectively.关键词
团头鲂/生长阶段/脂肪/需要量Key words
blunt snout bream/growth stage/lipid/requirement分类
农业科技引用本文复制引用
姚林杰,黄雨薇,叶元土,蔡春芳,张平,许凡,刘猛,刘汉超,董娇娇,陈科全..幼鱼和育成鱼阶段团头鲂对饲料中脂肪的需要量[J].动物营养学报,2014,(12):3698-3706,9.基金项目
农业部公益性行业(农业)科研专项(201003020) （农业）
