Effects of Eupolyphaga sinensis Walker Polypeptides on Growth Performance, Meat Quality, Organ Indexes and Antioxidant Capacity of Broilers Under Oxidative Stress

XIE Mengrui, LI Qiuming, QIU Siqi, QI Xiaolong, SHEN Hong

doi:10.3969/j.issn.1006-267x.2018.05.015

2018 , Vol. 30 >Issue 5: 1726 - 1735

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.05.015

Molecular Nutrition

Effects of Eupolyphaga sinensis Walker Polypeptides on Growth Performance, Meat Quality, Organ Indexes and Antioxidant Capacity of Broilers Under Oxidative Stress

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1. College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China;
2. Beijing Key Laboratory of Traditional Chinese Veterinary Medicine, Beijing 102206, China

Received date: 2017-11-01

Online published: 2018-05-06

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Abstract

This experiment was conducted to investigate the effects of Eupolyphaga sinensis Walker polypeptides (ESWPs) on growth performance, meat quality, organ indexes and antioxidant capacity of broilers under oxidative stress induced by hydrocortisone. One hundred and eighty 1-day-old healthy Arbor Acres (AA) broilers were randomly divided into 5 groups with 6 replicates per group and 6 broilers per replicate. Five groups were control group, model group (25 mg/L hydrocortisone), and 0.4, 0.8 and 1.6 g/kg BW ESWPs groups, respectively. ESWPs were supplemented into the drinking water from the 4^th day to the 21^st day in the three ESWPs groups. At the 8^th day, hydrocortisone were supplemented into the drinking water in all groups except control group for 5 days. The experiment lasted for 21 days. The results showed as follows:1) serum corticosterone content of broilers in model group was significantly higher than that in control group and ESWPs groups at 14 days of age (P<0.05). 2) From 1 to 14 days of age, compared with control group, average daily gain (ADG) of broilers in model group was significantly decreased (P<0.05), and the ratio of feed to gain (F/G) significantly increased (P<0.05); compared with model group, F/G in ESWPs groups significantly decreased (P<0.05). From 15 to 21 days of age, ADG and average daily feed intake (ADFI) in model group were significantly lower than those in control group (P<0.05). From 1 to 21 days of age, ADG and ADFI in model group were significantly lower than those in control group (P<0.05), F/G in model group was significantly higher than that in control group (P<0.05); and F/G in 0.4 and 1.6 g/kg BW ESWPs groups was significantly lower than that in model group (P<0.05). 3) At 14 days of age, compared with control group, pH_{45 min} and redness (a^*) value in breast muscle of broilers in model group significantly decreased (P<0.05), and drip loss in breast and leg muscles significantly increased (P<0.05); compared with model group, pH_{45 min} in breast muscle in 0.8 g/kg BW ESWPs group significantly increased (P<0.05), drip loss in breast muscle was significantly decreased (P<0.05), and drip loss in leg muscle in 0.4 and 1.6 g/kg BW ESWPs groups was significantly decreased (P<0.05). At 21 days of age, compared with model group, the a^* value in breast muscle in 0.4 g/kg BW ESWPs group significantly increased (P<0.05), drip loss in breast muscle significantly decreased (P<0.05). 4) At 14 days of age, the indexes of spleen, thymus and bursa of Fabricius in model group were significantly lower than that in control group (P<0.05). At 21 days of age, bursa of Fabricius index in model group was significantly lower than that in control group and 1.6 g/kg BW ESWPs group (P<0.05). 5) At 14 days of age, the activity of superoxide dismutase (SOD) in liver and breast muscle of broilers in model group was significantly lower than that in control group (P<0.05), the activity of glutathione peroxidase (GSH-Px) in liver and breast muscle was significantly lower than that in control group and 0.4 g/kg BW ESWPs group (P<0.05), and the activity of catalase (CAT) in liver and breast muscle was significantly lower than that in control group and 0.8 and 1.6 g/kg BW ESWPs groups (P<0.05). At 14 and 21 days of age, the content of malondialdehyde (MDA) in liver and breast muscle in model group was significantly higher than that in control group (P<0.05). The results indicate that ESWPs can effectively alleviate the stress response of broilers under oxidative stress, promote broilers growth, improve meat quality, and enhance the antioxidant capacity of broilers.

Key words： Eupolyphaga sinensis Walker polypeptides; broilers; oxidative stress; meat quality; antioxidant capacity

Cite this article

XIE Mengrui, LI Qiuming, QIU Siqi, QI Xiaolong, SHEN Hong . Effects of Eupolyphaga sinensis Walker Polypeptides on Growth Performance, Meat Quality, Organ Indexes and Antioxidant Capacity of Broilers Under Oxidative Stress[J]. Chinese Journal of Animal Nutrition, 2018 , 30(5) : 1726 -1735 . DOI: 10.3969/j.issn.1006-267x.2018.05.015

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