动物营养学报 >

2014 , Vol. 26 >Issue 8: 2176 - 2183

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.08.020

反刍与草食动物营养 Ruminants and Herbivorous Animal Nutrition

饲粮色氨酸水平对生长肉兔生产性能及血清生化指标的影响

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  • 1. 四川农业大学动物营养研究所, 雅安 625014;
    2. 四川农业大学动物科技学院, 雅安 625014;
    3. 广元市畜牧食品局, 广元 628000
王滔（1988-），女，四川资阳人，硕士研究生，从事单胃动物营养研究。E-mail：wangtao12321@163.com

收稿日期: 2014-03-19

  网络出版日期: 2014-08-13

基金资助

四川农业大学双支计划（03571066）

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Effects of Dietary Tryptophan Level on Performance and Serum Biochemical Indices of Growing Meat Rabbits

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  • 1. Animal Nutrition Institute, Sichuan Agricultural University, Ya'an 625014, China;
    2. College of Animal Science and Technology, Sichuan Agricultural University, Ya'an 625014, China;
    3. Guangyuan Animal Husbandry Bureau in Sichuan Province, Guangyuan 628000, China

Received date: 2014-03-19

  Online published: 2014-08-13

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摘要

本试验旨在通过探讨一定消化能（DE）水平下饲粮色氨酸（Trp）水平对生长肉兔生产性能及血清生化指标的影响，得到生长肉兔饲粮中Trp的适宜水平。选择平均体重为（1 099.14±54.01）g的健康新西兰生长肉兔112只，随机分为8组（每组7个重复，每个重复2只兔），分别饲喂Trp水平为0.165%、0.175%、0.185%、0.195%、0.205%、0.215%、0.225%和0.235%的试验饲粮。预试期7 d，正试期28 d。结果表明：1）饲粮Trp水平对生长肉兔平均日采食量（ADFI）和料重比（F/G）有显著影响（P<0.05），对平均日增重（ADG）有极显著影响（P<0.01），以饲粮Trp水平为0.205%的组ADFI和ADG最高，F/G最低。2）饲粮Trp水平对生长肉兔血清尿素氮（UN）和类胰岛素样生长因子-Ⅰ（IGF-Ⅰ）含量有极显著影响（P<0.01），以饲粮Trp水平为0.205%的组血清UN含量最低，血清IGF-Ⅰ含量最高。饲粮Trp水平对生长肉兔血清总蛋白（TP）和白蛋白（ALB）含量无显著影响（P>0.05）。综合本试验测定指标，当饲粮DE水平为10.48 MJ/kg时，生长肉兔饲粮中Trp的适宜水平为0.205%（实测值为0.196%）。

关键词： 生长肉兔; 色氨酸; 需要量; 消化能; 生产性能; 血清生化指标

本文引用格式

王滔, 贾刚, 雷怀刚, 李锐, 王康宁 . 饲粮色氨酸水平对生长肉兔生产性能及血清生化指标的影响[J]. 动物营养学报, 2014 , 26(8) : 2176 -2183 . DOI: 10.3969/j.issn.1006-267x.2014.08.020

Abstract

This experiment was conducted to study the effects of dietary tryptophan level on performance and serum biochemical indices of growing meat rabbits in a certain level of digestible energy, in order to determine the appropriate level of dietary tryptophan. A total of 112 healthy New Zealand growing meat rabbits with an average body weight of (1 099.14±54.01) g were randomly assigned to 8 groups with 7 replicates per group and 2 rabbits per replicate. Rabbits in the 8 groups were fed experimental diets containing 0.165%, 0.175%, 0.185%, 0.195%, 0.205%, 0.215%, 0.225% and 0.235% tryptophan, respectively. The experiment lasted for 7 days for adaptation and 28 days for test. The results showed as follows: 1) dietary tryptophan level had significant influences on average daily feed intake (ADFI) and feed/gain (F/G) (P<0.05), and had a extremely significant influence on average daily gain (ADG) of growing meat rabbits (P<0.01). The ADFI and ADG had the maximum values and the F/G had the minimum value in the group with the diet containing 0.205% tryptophan. 2) Dietary tryptophan level had extremely significant influences on serum urea nitrogen and insilin-like growth factor-Ⅰ contents of growing meat rabbits (P<0.01). The serum urea nitrogen content had the minimum value and the serum insulin-like growth factor-Ⅰ content had the maximum value in the group with the diet containing 0.205% tryptophan. The contents of total protein and albumin in serum of growing meat rabbits were not significantly affected by dietary tryptophan level (P>0.05). Considering all indices of this experiment, when digestible energy level is 10.48 MJ/kg in the diet, the appropriate level of dietary tryptophan of growing meat rabbits is 0.205% (measured value is 0.196%).

Key words： growing meat rabbit; tryptophan; requirement; digestible energy; performance; serum biochemical indices

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