动物营养学报2016，Vol.28Issue(8)：2423-2430,8.DOI:10.3969/j.issn.1006-267x.2016.08.013
饲料中胆汁酸添加水平对齐口裂腹鱼幼鱼生长性能、形体指标及体成分的影响
Effects of Bile Acid Supplemental Level on Growth Performance, Physical Indices and Body Composition of Juvenile Schizothorax prenanti
摘要
Abstract
This experiment was conducted to study the effects of bile acid supplemental level on the growth per⁃formance, physical indices and body composition of juvenile Schizothorax prenanti. A total of 360 healthy ju⁃venile Schizothorax prenanti with the average body weight of (12.74±0.14) g were randomly divided into four groups with three replicates of 30 fish per replicate. Each group was fed a experimental diet containing either 0 ( control group) , 75, 150 or 300 mg/kg bile acid for 70 days. The results showed as follows: with bile acid supplemental level raising, the weight gain rate ( WGR) , specific growth rate( SGR) , protein efficiency ratio ( PER) had a trend of going up first and then leveled off. Conversely, the feed conversation ratio ( FCR) was firstly decreased and then to stabilization. The WGR, SGR and PER in bile acid supplemental groups were sig⁃nificantly higher than those in control group (P<0.05), while the FCR in bile acid supplemental groups was significantly lower than that in control group (P<0.05). The WGR and SGR were all the highest (226.63%and 1.69%/d, respectively) when the bile acid supplemental level was 150 mg/kg, and the PER was the high⁃est (1.64%) when the bile acid supplemental level was 300 mg/kg, while the FCR was the lowest (1.56) when the bile acid supplemental level was 75 mg/kg. Based on square regression analysis, the suitable bile acid supplemental level was 186.83, 192.86, 166.67 and 183.33 mg/kg, respectively, when WGR, SGR, PER and FCR of juvenile Schizothorax prenanti were optimum. With bile acid supplemental level raising, the condi⁃tion factor ( CF) was initially increased and then leveled off, the viscerasomatic index ( VSI) and hepaticso⁃matic index ( HSI) were initially increased and then decreased. The CF in bile acid supplemental groups was significantly higher than that in control group (P<0.05), while the VSI and HSI in bile acid supplemental groups were significantly lower than those in control group (P<0.05). The crude protein content of whole body and muscle was initially increased and then to stabilization with bile acid supplemental level raising, while the crude lipid content of whole body, muscle and hepatopancreas was initially decreased and then leveled off. There were no significant differences in moisture and crude ash contents of whole body and muscle with bile acid supplemental level raising (P>0.05). Results of above show that bile acid supplementation can improve feed efficiency, promote growth, improve physical indices and reduce fat deposition in muscle and liver of ju⁃venile Schizothorax prenanti. After comprehensive consideration, the suitable bile acid supplemental level in ju⁃venile Schizothorax prenanti diet is 166.67 to 192.86 mg/kg.关键词
齐口裂腹鱼/胆汁酸/生长性能/形体指标/体成分Key words
Schizothorax prenanti/bile acid/growth performance/physical indices/body composition分类
农业科技引用本文复制引用
郑宗林,曾本和,向枭,周兴华,陈建,吕光俊,朱成科,李代金,任胜杰..饲料中胆汁酸添加水平对齐口裂腹鱼幼鱼生长性能、形体指标及体成分的影响[J].动物营养学报,2016,28(8):2423-2430,8.基金项目
重庆市基础与前沿研究计划项目（ cstc2013jcyjA80033）；西南大学青年基金项目 （）
