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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

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.

Cite this article

MA Youbiao, ZHOU Liang, WANG Jing, ZHANG Haijun, YUE Hongyuan, WU Shugeng, QI Guanghai . Effects of in Ovo Feeding of β-Hyroxy-β-Methylbutyrate on Growth Performance, Carcass Composition and Plasma Hormones Indexes in Broilers[J]. Chinese Journal of Animal Nutrition, 2015 , 27(2) : 588 -595 . DOI: 10.3969/j.issn.1006-267x.2015.02.031

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