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胚蛋给养β-羟基-β-甲基丁酸对肉仔鸡生长性能、胴体组成和血浆激素指标的影响

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  • 农业部饲料生物技术重点开放实验室, 中国农业科学院饲料研究所, 北京 100081
马友彪(1989-), 男, 山东济宁人, 硕士研究生, 动物营养与饲料科学专业.E-mail:myb0514@126.com

收稿日期: 2014-09-15

  网络出版日期: 2015-02-09

基金资助

北京市自然科学基金(6132027);家禽产业技术体系北京市创新团队项目(CARS-PSTP);国家科技支撑计划(2011BAD26B04)

Effects of in Ovo Feeding of β-Hyroxy-β-Methylbutyrate on Growth Performance, Carcass Composition and Plasma Hormones Indexes in Broilers

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  • Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Received date: 2014-09-15

  Online published: 2015-02-09

摘要

β-羟基-β-甲基丁酸(HMB),是一种促进肌肉生长的营养补剂,本试验目的旨在探讨胚蛋给养HMB对肉仔鸡生长性能、胴体组成、肌肉品质、血浆生化和激素指标的影响.选用260枚爱拔益加(AA)肉鸡商品代受精蛋,随机分为2个组,分别在17.5胚龄向羊膜腔内无菌注射1 mL 0.1% HMB或等量的生理盐水(对照组).出壳后,从每个组中各选取48只体重相近健康公雏随机分成6个重复,每重复8只,饲养试验期42 d.结果表明:1)与对照组相比,胚蛋给养HMB对肉仔鸡孵化率无显著影响(P>0.05),肉仔鸡的体重在1、21和42日龄时分别提高了1.9(P<0.05)、41.8(0.05<P<0.10)和85.4 g(P>0.10);HMB组肉仔鸡的平均日增重在1~21日龄和1~42日龄均高于对照组(0.05<P<0.10);HMB显著降低了肉仔鸡1~21日龄和1~42日龄的料重比(P<0.05).2)21日龄时,HMB组的胸肌率和腿肌率较对照组显著提高了2.4%和6.4%(P<0.05),42日龄时全净膛率、胸肌率和腿肌率虽略有提高,但差异不显著(P>0.05);胚蛋给养HMB对肉仔鸡的胸肉品质无显著影响(P>0.05).3)胚蛋给养HMB对肉仔鸡的肝脏和免疫器官指数均无显著影响(P>0.05).4)胚蛋给养HMB对肉仔鸡血浆生化指标(总蛋白、尿酸、肌酐含量)以及甲状腺激素、生长激素和胰岛素含量均无显著影响(P>0.05).综合本试验结果,胚蛋给养HMB可促进雄性肉仔鸡生长前期的平均日增重和肌肉发育,随日龄增加促生长作用逐渐减弱,且促生长作用与血浆甲状腺激素、生长激素和胰岛素含量变化无关,其机理有待进一步研究.

本文引用格式

马友彪, 周梁, 王晶, 张海军, 岳洪源, 武书庚, 齐广海 . 胚蛋给养β-羟基-β-甲基丁酸对肉仔鸡生长性能、胴体组成和血浆激素指标的影响[J]. 动物营养学报, 2015 , 27(2) : 588 -595 . DOI: 10.3969/j.issn.1006-267x.2015.02.031

Abstract

β-hydroxy-β-methylbutyrate (HMB) is a nutritional supplement to promote muscle growth. The objective of this study was to examine the effects of in ovo feeding (IOF) of HMB on growth performance, carcass composition, meat quality, plasma biochemical and hormone indexes in broilers. A total of 260 fertile eggs from Arbor Acre breeder were allotted into 2 groups by feeding embryos on day 17.5 of incubation with 1 mL saline solution in the presence or absence (control group) of 0.1% HMB. Forty-eight male hatchlings selected from each group after hatch and placed in 6 replicates with 8 birds each. The experiment lasted for 42 days. The results showed as follows: 1) IOF of HMB did not significantly affect the hatchability of broiler (P>0.05), IOF of HMB resulted in 1.9 (P<0.05), 41.8 (0.05<P<0.10) and 85.4 g (P>0.10) more body weight on 1, 21 and 42 days of age compared with the control group; IOF of HMB partially elevated average daily gain of broilers aged from 1 to 21 days and 1 to 42 days compared with the control group (0.05<P<0.10); the ratio of feed to gain of broilers aged from 1 to 21 days and 1 to 42 days was significantly reduced compared with the control group (P<0.05). 2) IOF of HMB resulted in 2.4% more breast muscle (P<0.05) and 6.4% more leg muscle (P<0.05) at broilers at 21 days of age, and numerically increased dressing percentage, breast and leg muscle percentage rate at 42 days of age (P>0.05). IOF of HMB did not significantly change the meat quality of broiler at 42 days of age (P>0.05). 3) IOF of HMB did not significantly affect liver and immune organ index of broilers (P>0.05). 4) IOF of HMB had no significant effects on plasma biochemical indexes (total protein, uric acid, creatinine contents), plasma thyroid hormone, growth hormone and insulin contents (P>0.05). Together, IOF of HMB may promote the early growth of muscle development and average daily gain in male broilers, but the promotion effects gradually weakened with age. The growth-promoting effect of IOF of HMB is not induced by the change of plasma thyroid hormone, growth hormone and insulin contents and warranted further study.

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