Effects of Pre-Slaughter Fasting Time on Carbohydrate Metabolism, Meat Quality and Serum Biochemical and Stress Indexes of Broilers

WU Xuezhuang, LI Xiaojuan, LING Qinglu, SUN Minhui, ZHANG Xiaoying, YIN Lijun, GAO Xiuhua, DAI Sifa, WEN Zhiguo, HU Hong, WEN Aiyou

doi:10.3969/j.issn.1006-267x.2019.03.017

2019 , Vol. 31 >Issue 3: 1119 - 1126

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.03.017

Molecular Nutrition

Effects of Pre-Slaughter Fasting Time on Carbohydrate Metabolism, Meat Quality and Serum Biochemical and Stress Indexes of Broilers

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1. College of Animal Science, Anhui Science and Technology University, Bengbu 233100, China;
2. Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Received date: 2018-08-20

Online published: 2019-03-18

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Abstract

This study was conducted to evaluate the effects of pre-slaughter fasting time on carbohydrate metabolism, meat quality and serum biochemical and stress indexes of broilers. Fifty 42-day-old Arbor Acres (AA) broilers were randomly divided into 5 groups with 10 replicates per group and 1 broiler per replicate. The pre-slaughter fasting times in 5 groups were 0, 6, 12, 18 and 24 h, respectively. The results showed that the contents of serum glucose, hepatic glycogen and muscle glycogen were significantly linear and quadratic decreased with fasting time extended (P<0.05). The pH_{24 h} in breast muscle and leg muscle was significantly linear and quadratic increased with fasting time extended (P<0.05), and the lighteness value, cooking loss and shear force in breast muscle and leg muscle were significantly linear and quadratic decreased with fasting time extended (P<0.05). The albumin and uric acid contents and alanine aminotransferase activity in serum were significantly linear and quadratic decreased with fasting time extended (P<0.05), and the aspartate aminotransferase and creatine kinase activities and corticosterone content in serum were significantly linear and quadratic increased with fasting time extended (P<0.05). In conclusion, the pre-slaughter fasting time ≥ 12 h will intensify the fasting stress of broilers, the reasonable fasting time (6 to 12 h) can improve the meat quality.

Key words： fasting time; broilers; meat quality; stress

Cite this article

WU Xuezhuang, LI Xiaojuan, LING Qinglu, SUN Minhui, ZHANG Xiaoying, YIN Lijun, GAO Xiuhua, DAI Sifa, WEN Zhiguo, HU Hong, WEN Aiyou . Effects of Pre-Slaughter Fasting Time on Carbohydrate Metabolism, Meat Quality and Serum Biochemical and Stress Indexes of Broilers[J]. Chinese Journal of Animal Nutrition, 2019 , 31(3) : 1119 -1126 . DOI: 10.3969/j.issn.1006-267x.2019.03.017

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