Effects of Adding Amino Acid Zinc in Diets on Slaughter Performance, Meat Quality and Trace Element Contents in Blood and Tissue of Fattening Sheep

HOU Pengxia; LI Yuhua; WANG Jiandong; MA Jifeng; YU Yang; ZHANG Shourong; LIANG Xiaojun

doi:10.3969/j.issn.1006-267x.2021.01.057

2021 , Vol. 33 >Issue 1: 563 - 571

DOI: https://doi.org/10.3969/j.issn.1006-267x.2021.01.057

Effects of Adding Amino Acid Zinc in Diets on Slaughter Performance, Meat Quality and Trace Element Contents in Blood and Tissue of Fattening Sheep

HOU Pengxia ,
LI Yuhua ,
WANG Jiandong ,
MA Jifeng ,
YU Yang ,
ZHANG Shourong ,
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: 2020-06-19

Online published: 2021-01-18

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Abstract

This experiment was conducted to investigate the effects of adding amino acid zinc in diets on slaughter performance, meat quality and trace element contents in blood and tissue of fattening sheep. Forty-eight ram Tan×Hu sheep at 4 months of age, which had a good condition and (29.00±0.61) kg body weight, were randomly divided into 4 groups, and 12 sheep in each group. Zinc content of the control group diet was 52.80 mg/kg (sulfate zinc). Zinc content of the test group Ⅰ, test group Ⅱ and test group Ⅲ was 1/2, 1 and 2 times (amino acid zinc) of the control group diet, respectively. Pretrial period was 10 d, and trial period was 60 d. The results showed as follows: adding amino acid zinc to diets significantly increased the average daily gain of fattening sheep (P<0.05), and the average daily gain of group Ⅱ was 283.59 g/d; there was no significant effect on slaughter performance and meat physicochemical properties of fattening sheep. However, with the increase of dietary amino acid zinc content, the meat to bone ratio, backfat and eye area of the test groups increased first and then decreased, the GR value and the content of fat in muscle increased, and the shear of tenderness decreased; the content of zinc in the blood in test groups was higher than that in control group, and in the test group, and under the same amount of zinc added condition, the content of zinc in test group Ⅱ was significantly higher than that in control group (P<0.01); zinc deposition in the longissimus dorsi, kidney, heart, liver and lung among the groups was not significant (P>0.05), however, too much amino acid could affect the deposition of iron in muscle, kidney, zinc, lung and copper in liver. It is concluded that dietary addition of amino acid zinc can promote the growth of fattening sheep, improve meat quality, with the 18.02 mg/kg of basal diet zinc content, effect of zinc addition with 52.80 mg/kg (amino acid zinc) is the best.

Key words： amino acid zinc; fattening sheep; meat quality; microelement

Cite this article

HOU Pengxia , LI Yuhua , WANG Jiandong , MA Jifeng , YU Yang , ZHANG Shourong , LIANG Xiaojun . Effects of Adding Amino Acid Zinc in Diets on Slaughter Performance, Meat Quality and Trace Element Contents in Blood and Tissue of Fattening Sheep[J]. Chinese Journal of Animal Nutrition, 2021 , 33(1) : 563 -571 . DOI: 10.3969/j.issn.1006-267x.2021.01.057

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