文章摘要
孙丽慧,陈建明,潘茜,沈斌乾,姜建湖,黄爱霞.草鱼鱼种对饲料中苯丙氨酸需求量的研究[J].上海海洋大学学报,2016,25(3):388-395
草鱼鱼种对饲料中苯丙氨酸需求量的研究
Dietary phenylalanine requirement for fingerling grass carp (Ctenopharyngodon idella)
投稿时间:2015-09-07  修订日期:2015-12-09
DOI:10.12024/jsou.20150901545
中文关键词: 草鱼  苯丙氨酸需求量  鱼体增重率  饲料效率  蛋白质积累率
英文关键词: Ctenopharyngodon idella  phenylalanine requirement  weight gain rate  feed efficiency  protein retention efficiency
基金项目:国家大宗淡水鱼产业技术体系(CARS-46-21)
作者单位E-mail
孙丽慧 浙江省淡水水产研究所 农业部淡水渔业健康养殖实验室, 浙江 湖州 313001
浙江省淡水水产研究所 浙江省鱼类健康与营养重点实验室, 浙江 湖州 313001 
 
陈建明 浙江省淡水水产研究所 农业部淡水渔业健康养殖实验室, 浙江 湖州 313001
浙江省淡水水产研究所 浙江省鱼类健康与营养重点实验室, 浙江 湖州 313001 
aqua_labjm@163.com 
潘茜 浙江省淡水水产研究所 农业部淡水渔业健康养殖实验室, 浙江 湖州 313001
浙江省淡水水产研究所 浙江省鱼类健康与营养重点实验室, 浙江 湖州 313001 
 
沈斌乾 浙江省淡水水产研究所 农业部淡水渔业健康养殖实验室, 浙江 湖州 313001
浙江省淡水水产研究所 浙江省鱼类健康与营养重点实验室, 浙江 湖州 313001 
 
姜建湖 浙江省淡水水产研究所 农业部淡水渔业健康养殖实验室, 浙江 湖州 313001
浙江省淡水水产研究所 浙江省鱼类健康与营养重点实验室, 浙江 湖州 313001 
 
黄爱霞 浙江省淡水水产研究所 农业部淡水渔业健康养殖实验室, 浙江 湖州 313001
浙江省淡水水产研究所 浙江省鱼类健康与营养重点实验室, 浙江 湖州 313001 
 
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中文摘要:
      为了研究草鱼鱼种对饲料中苯丙氨酸的需求量,用7组等氮精制饲料[苯丙氨酸水平为8.2~21.2 g/(kg干饲料)]饲喂初始体质量为13.21 g的草鱼鱼种56 d。结果表明,鱼体增重率、饲料效率和蛋白质积累率随饲料苯丙氨酸水平从8.2 g/kg提高到12 g/kg而显著升高,但继续升高则不再有显著变化;饲料苯丙氨酸水平对草鱼全鱼粗蛋白质影响显著(P<0.05),但对草鱼鱼种成活率、脏体比、肝体比和肥满度无显著影响(P>0.05)。分别以鱼体增重率、饲料效率和蛋白质积累率为指标,用折线回归模型分析,求得草鱼鱼种对饲料苯丙氨酸的需求量分别为12.73、12.20和12.55 g/(kg干饲料)。因此草鱼鱼种对饲料苯丙氨酸适宜需求量为12.20~12.73 g/(kg干饲料),饲料酪氨酸水平约5.5 g/(kg干饲料),占饲料粗蛋白的3.39%~3.54%。
英文摘要:
      A feeding experiment was conducted to assess the dietary phenylalanine requirement for fingerling grass carp (Ctenopharyngodon idella). Seven isonitrogenous diets with graded levels of phenylalanine ranging from 0.82% to 2.12% (% Dry matter) were fed to triplicate groups of fish with an average initial body weight of 13.21g for 56 days, respectively. The results show that weight gain rate, feed efficiency and protein retention efficiency increased with increasing of dietary phenylalanine level from 8.2 g/kg to 12.0 g/kg, but appeared to keep stable with further increasing to 21.2 g/kg. And whole fish body protein was affected significantly by dietary phenylalanine level (P<0.05). However, fish survival rate, viscerasomatic index, hepatosomatic index, condition factor and whole fish body moisture, lipid and ash were not affected significantly by dietary phenylalanine level (P>0.05). The broken-line regression analysis with weight gain, feed efficiency and protein retention efficiency as the criteria indicated that the requirements of dietary phenylalanine for fingerling grass carp were 12.73 g/kg, 12.20 g/kg and 12.55 g/kg of dry diet respectively. In conclusion, the dietary phenylalanine requirement for fingerling grass carp was estimated to be 12.20-12.73 g/kg dry diet(with 5.5 g/kg tyrosine in diet), and 3.39%-3.54% of the dietary crude protein.
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