Effects of Persistent Heat Stress on Growth Performance, Meat Quality and Blood Indexes on Yellow-Feathered Broilers

ZHONG Guang, SHI Shourong, SHAO Dan, HU Yan, SONG Zhigang, TONG Haibing

doi:10.3969/j.issn.1006-267x.2018.10.016

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 10: 3923 - 3929

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.10.016

Molecular Nutrition

Effects of Persistent Heat Stress on Growth Performance, Meat Quality and Blood Indexes on Yellow-Feathered Broilers

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1. Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou 225125, China;
2. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China;
3. Institute of Effective Evaluation of Feed and Feed Additive(Poultry Institute), Ministry of Agriculture, Yangzhou 225125, China

Received date: 2018-04-09

Online published: 2018-10-20

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Abstract

This experiment was to study the effects of persistent heat stress on growth performance, meat quality and blood indexes of yellow-feathered broilers. One hundred and ninety-two 35-day-old male yellow-feathered broilers were randomly divided into normal temperature group and persistent heat stress group with 8 replicates per group and 12 chicks per replicate. The environment temperature of normal temperature group was given 26℃, while the persistent heat stress group was given 34℃ persistent heat stress, and the relative humidity all about 55%. The experiment lasted for 14 days. The results showed as follows:compared with the normal temperature group, persistent heat stress significantly reduced the final body weight, average daily gain and average daily feed intake (P<0.05), while there was no significant effects on muscle quality indexes (P>0.05). On the 3rd day of heat stress, the activity of serum aspartate aminotransferase (AST) of persistent heat stress group was significantly higher than that of normal temperature group (P<0.05); on the 7th day of heat stress, the serum AST and alkaline phosphatase (AKP) activities and rectal temperature of persistent heat stress group were significantly higher than those of normal temperature group (P<0.05); on the 14th day of heat stress, the activity of cholinesterase (CHE) of persistent heat stress group was significantly lower than that of normal temperature group (P<0.05), while the activities of serum alanine aminotransferase (ALT), AST, AKP, lactic dehydrogenase (LDH) and creatine phosphokinase (CPK) of persistent heat stress group were significantly higher than those of normal group (P<0.05). In summary, persistent heat stress can reduce growth performance, improve the activities of some enzymes that reflects liver function injury, however, there is no significant effects on meat quality of yellow-feathered broilers.

Key words： yellow-feathered broilers; persistent heat stress; growth performance; meat quality; blood indexes

Cite this article

ZHONG Guang, SHI Shourong, SHAO Dan, HU Yan, SONG Zhigang, TONG Haibing . Effects of Persistent Heat Stress on Growth Performance, Meat Quality and Blood Indexes on Yellow-Feathered Broilers[J]. Chinese Journal of Animal Nutrition, 2018 , 30(10) : 3923 -3929 . DOI: 10.3969/j.issn.1006-267x.2018.10.016

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