Effects of Constant Moderate Temperatures on Performance, Glucose and Lipid Metabolism, Expression of Uncoupling Protein of broilers

ZHEN Long; SHI Yuxiang; ZHANG Minhong; FENG Jinghai; ZHANG Shaoshuai; PENG Qianqian

doi:10.3969/j.issn.1006-267x.2015.07.011

2015 , Vol. 27 >Issue 7: 2060 - 2069

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.07.011

Molecular Nutrition

Effects of Constant Moderate Temperatures on Performance, Glucose and Lipid Metabolism, Expression of Uncoupling Protein of broilers

ZHEN Long ,
SHI Yuxiang ,
ZHANG Minhong ,
FENG Jinghai ,
ZHANG Shaoshuai ,
PENG Qianqian

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1. College of Agriculture HeBei University of Engineering, Handan 056021, China;
2. State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China

Received date: 2015-02-16

Online published: 2015-07-07

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Abstract

This experiment was conducted to study the effects of three different constant ambient temperatures (21, 26 and 31 ℃) on performance, serum biochemical and hormone indices related in glucose and lipid metabolism, and expression of uncoupling protein in pectoralis muscle and liver of broilers. One hundred and forty-four 22-day-old Arbor Acres (AA) broilers were assigned to three environment chambers, each chamber contained six cages with eight birds per cage(with four males and four females), and each cage as a replicate. The pre-test period lasted for 7 days and broilers were kept at 21 ℃ and 60% relative humidity. When broilers were 29-day-old, the temperatures of each environmental chamber were gradually regulated to 21, 26 and 31 ℃, respectively, while maintaining the relative humidity at 60% and both kept constant until the end of the experiment. The trial period lasted for 14 days. The results showed as follows: 1) average daily gain (ADG), average daily food intake (ADFI) and food to gain ratio (F/G) in 31 ℃ group showed highly significant (P < 0.01) depression than that in 21 and 26 ℃ groups; ADG and ADFI in 26 ℃ group were significant (P < 0.05) lower than that in 21 ℃ group, with no significant difference (P > 0.05) in F/G was found between the two groups. 2) serum glucose (GLU), total cholesterol (TC), total triglyceride (TG) and nonestesterified fatty acid (FFA) in 31 ℃ were significant (P < 0.05) higher than that in 21 ℃ group, with no significant difference (P > 0.05) was found between 21 and 26 ℃ groups. 3) serum thyroxine (T₄), leptin (LEP) and corticosterone (CORT) in 31 ℃ were significant (P < 0.05) higher than that in 21 ℃ group, with no significant difference (P > 0.05) was found between 21 and 26 ℃ groups except for T₄. 4) expression of avian uncoupling protein (avUCP) mRNA in pectoral muscle of broilers in 31 ℃ group showed highly significant (P < 0.01) depression than that in 21 and 26 ℃ groups at the seventh day, with highly significant (P < 0.01) depression in 26 and 31 ℃ groups than 21 ℃ at the fourteenth day; throughout the trial period, expression of avUCP mRNA in liver of broilers in 31 ℃ group was highly significant (P < 0.01) higher than that in 21 and 26 ℃ groups. In conclusion, compared with 21 ℃ group, the constant moderate heat stress (26 and 31 ℃) can the performance, glucose and lipid metabolism, and expression of uncoupling protein of broilers. And the different extent moderate heat stress would produce different effects on that.

Key words： moderate temperature; broiler; performance; glucose and lipid metabolism; avian uncoupling protein

Cite this article

ZHEN Long , SHI Yuxiang , ZHANG Minhong , FENG Jinghai , ZHANG Shaoshuai , PENG Qianqian . Effects of Constant Moderate Temperatures on Performance, Glucose and Lipid Metabolism, Expression of Uncoupling Protein of broilers[J]. Chinese Journal of Animal Nutrition, 2015 , 27(7) : 2060 -2069 . DOI: 10.3969/j.issn.1006-267x.2015.07.011

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