动物营养学报2018，Vol.30Issue(5)：1781-1788,8.DOI:10.3969/j.issn.1006-267x.2018.05.020
吉富罗非鱼对饲料中维生素B6的需要量
Dietary Vitamin B6Requirement of Genetically Improved Farmed Tilapia(Oreochromis niloticus)
摘要
Abstract
This experiment was conducted to estimate the effects of dietary vitamin B6content on growth per-formance, whole body and muscle nutritional composition, serum and liver biochemical indices of genetic im-provement of farmed tilapia(GIFT, Oreochromis niloticus), and to determine the dietary vitamin B6require-ment of GIFT. A total of 360 GIFT with the average initial body weight of(56.3±1.8)g were randomly divid-ed into 6 groups with 3 replicates per group and 20 fish per replicate. The fish were fed six purified diets which containing 0.3(control group),2.7,5.4,10.1,20.5 and 39.8 mg/kg vitamin B6, respectively. The experi-ment lasted for 10 weeks. The results showed as follow: 1)with the increased of dietary vitamin B6content (0.3 to 10.1 mg/kg),the weight gain rate of GIFT was significantly increased(P<0.05),and then reached a plateau when dietary vitamin B6content reached 10.1 mg/kg. The feed conversion ratio of GIFT in 5.4,10.1, 20.5 and 39.8 mg/kg groups were significantly lower than those in control group and 2.7 mg/kg group(P<0.05). The hepatosomatic index in 5.4 and 20.5 mg/kg groups was significantly higher than that in control group(P<0.05). 2)The contents of crude protein and ash in whole body in 2.7, 5.4, 10.1, 20.5 and 39.8 mg/kg groups were significantly higher than those in control group(P<0.05). The 10.1 mg/kg group got the lowest crude lipid content, and was significantly lower than that in control group and 2.7, 5.4 and 39.8 mg/kg groups(P<0.05). The muscle crude protein content in 5.4,10.1 and 20.5 mg/kg groups was sig-nificantly higher than that in control group(P<0.05). 3)There were no significant effects on serum glucose, total protein contents and liver aspartate aminotransferase activity among all groups(P>0.05). The serum alka-line phosphatase activity in 20.5 and 39.8 mg/kg groups was significantly higher than that in control group(P<0.05), the serum urea nitrogen content in 10.1 and 39.8 mg/kg groups was significantly higher than that in control group(P<0.05),the liver alanine aminotransferase activity in 10.1,20.5 and 39.8 mg/kg groups was significantly higher than that in control group and 2.7,5.4 mg/kg groups(P<0.05). In summary,the broken-line regression analysis shows that using weight rate and liver alanine aminotransferase activity as response crite-ria, the optimal requirements of dietary vitamin B6for GIFT[initial body weight(56.3±1.8)g]are 9.22 and 10.11 mg/kg, respectively.关键词
吉富罗非鱼/维生素B6/生长性能/生化指标/需要量Key words
GIFT/vitamin B6/growth performance/biochemical indices/requirement分类
农业科技引用本文复制引用
吴凡,任春,文华,蒋明,刘伟,田娟,杨长庚,喻丽娟,陆星..吉富罗非鱼对饲料中维生素B6的需要量[J].动物营养学报,2018,30(5):1781-1788,8.基金项目
现代农业产业技术体系专项资金(CARS-46) （CARS-46）
公益性行业(农业)科研专项经费(201003020) （农业）
