Molecular Nutrition

Effects of Persistent Heat Stress on Growth Performance, Organ Indices, Serum Biochemical Indices and Antioxidant Function of 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, Ministry of Agriculture, Yangzhou 225125, China

Received date: 2018-04-12

  Online published: 2018-11-20

Abstract

This experiment was conducted to study the effects of persistent heat stress on growth performance, organ indices, serum biochemical indices and antioxidant function of yellow-feathered broilers. A total of 192 healthy 35-day-old yellow-feathered broilers were randomly divided into normal group and persistent heat stress group with 8 replicates per group and 12 chicks per replicate. Broilers in persistent heat stress group were given a persistent heat stress at 34℃, while (26±0.5)℃ in normal group. The relative humidity is about 55%. The experiment lasted for 14 days. The results showed as follows:after heat stress for 3 days, the contents of uric acid (UA), triglyceride (TG) and calcium ion (Ca2+) in serum and the activity of glutathione peroxidase (GSH-Px), the content of nitric oxide (NO) in liver of persistent heat stress group were significantly lower than those of the normal group (P<0.05). After heat stress for 7 days, the contents of total cholesterol (T-CHO), high density lipoprotein (HDL) in serum and NO content in liver of persistent heat stress group were significantly higher than those of the normal group (P<0.05), while the contents of TG, NO and the activities of catalase (CAT), superoxide dismutase (SOD) in serum were significantly lower than those of the normal group (P<0.05). After heat stress for 14 days, the body weight, average daily gain (ADG) and average daily feed intake (ADFI) of persistent heat stress group were significantly lower than those of the normal group (P<0.05), while the ratio of feed to gain was significantly higher than that of the normal group (P<0.05), the contents of glucose (GLU) and TG in serum were significantly higher than those of the normal group (P<0.05). In summary, persistent heat stress can decrease the growth performance, affect the metabolism of fat and reduce the body antioxidant function of yellow-feathered broilers.

Cite this article

ZHONG Guang, SHAO Dan, HU Yan, SHI Shourong, SONG Zhigang, TONG Haibing . Effects of Persistent Heat Stress on Growth Performance, Organ Indices, Serum Biochemical Indices and Antioxidant Function of Yellow-Feathered Broilers[J]. Chinese Journal of Animal Nutrition, 2018 , 30(11) : 4425 -4432 . DOI: 10.3969/j.issn.1006-267x.2018.11.019

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