Effects of Amino Acid Zinc on Growth Performance, Serum Hormone, Immune and Antioxidant Indexes of Tan&times;Hu Sheep

HOU Pengxia; LI Yuhua; MA Jifeng; WANG Jiandong; YU Yang; YANG Jian; LIANG Xiaojun

doi:10.3969/j.issn.1006-267x.2020.09.034

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 9: 4242 - 4250

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.09.034

Effects of Amino Acid Zinc on Growth Performance, Serum Hormone, Immune and Antioxidant Indexes of Tan×Hu Sheep

HOU Pengxia ,
LI Yuhua ,
MA Jifeng ,
WANG Jiandong ,
YU Yang ,
YANG Jian ,
LIANG Xiaojun

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1. Institute of Animal Science, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
2. Promotion Service Center of Guyuan Animal Husbandry Technology, Guyuan 756000, China;
3. Ningxia Rong Hua Animal Husbandry Holdings Limited, Tongxin 751300, China

Received date: 2020-03-02

Online published: 2020-09-17

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Abstract

This study was conducted to investigate the effects of amino acid zinc on growth performance, serum hormone, immunity and antioxidant indexes of Tan×Hu sheep. Forty-eight ram Tan×Hu sheep, which had a good condition and 29 kg weight with similar age, were randomly divided into 4 groups, and 12 sheep in each group. Zinc content was 52.80 mg/kg (zinc sulfate) in control group, and were 26.40, 52.80 and 79.20 mg/kg (amino acid zinc replaced zinc sulfate) in trial groups 1, 2 and 3, respectively. Pretrial period was 7 days, and trial period was 60 days. The results showed as follows:1) the average daily gain of the Tan×Hu sheep increased by adding the amino acid zinc to the diet, trial group 2 had the highest average daily gain, and was significantly higher than the control group (P<0.05). 2) Adding the amino acid zinc to the diet increased the immunity of Tan×Hu sheep, the contents of immunoglobulin (Ig) A, IgG and IgM in serum showed an increasing trend with the increase of amino acid zinc content in the diet at days 50 and 60 of test, but decreased first and then increased with the increase of the test time. 3) The content of insulin (INS) in serum was the lowest in trial group 2 at day 40 of test, and was significantly lower than that in the control group at day 50 of test (P<0.01); the content of insulin like growth factor-1 (IGF-1) in serum increased with the increase of amino acid zinc content in the diet at days 40 and 50 of test, the trial group 2 had the highest content at day 60, and was significantly higher than control group (P<0.01). The activities of superoxide dismutase (SOD), glutathion peroxidase (GSH-Px) and catalase (CAT) in serum significantly increased by adding amino acid zinc at days 50 and 60 of test (P<0.01), and the content of malonaldehyde (MDA) in serum significantly decreased (P<0.01). The antioxidant indexes decreased first and then increased with the increase of the test time. 4) The blood zinc content increased first and then decreased with the increase of amino acid zinc content. It is concluded that the bioavailability of amino acid zinc is higher than that of sulfate zinc, and the addition of amino acid zinc (zinc content 52.80 mg/kg) for more than 50 days can increase daily gain, serum IGF-1 content, body immunity and antioxidant function, and promote growth of Tan×Hu sheep.

Key words： amino acid zinc; Tan×; Hu sheep; growth performance; hormone content; immune function; antioxidant function

Cite this article

HOU Pengxia , LI Yuhua , MA Jifeng , WANG Jiandong , YU Yang , YANG Jian , LIANG Xiaojun . Effects of Amino Acid Zinc on Growth Performance, Serum Hormone, Immune and Antioxidant Indexes of Tan×Hu Sheep[J]. Chinese Journal of Animal Nutrition, 2020 , 32(9) : 4242 -4250 . DOI: 10.3969/j.issn.1006-267x.2020.09.034

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