Effects of Diets With Different Copper Levels on Growth Performance, Slaughter Performance and Meat Quality of House-Feeding Tan Sheep

SUN Jinsong, WANG Xue, GAO Changpeng, LI Haiqing, CHEN Xueying, TIAN Yufu, LI Zuoming, ZHOU Yuxiang

doi:10.3969/j.issn.1006-267x.2019.06.054

2019 , Vol. 31 >Issue 6: 2927 - 2932

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.06.054

Molecular Nutrition

Effects of Diets With Different Copper Levels on Growth Performance, Slaughter Performance and Meat Quality of House-Feeding Tan Sheep

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1. College of Agriculture in Ningxia University, Yinchuan 750021, China;
2. Ningxia Luning Small Tail Hai Sheep Farm, Yinchuan 750200, China

Received date: 2018-12-11

Online published: 2019-06-17

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Abstract

The purpose of this study was to investigate the effects of diets with different copper levels on growth performance, slaughter performance and meat quality of house-feeding Tan sheep, and to provide a scientific and reliable theoretical basis for the production of high quality mutton. Forty weaned healthy Tan sheep with similar body weight of 20 kg were randomly divided into four groups with 10 sheep in each group. Sheep in the control group were fed a basal diet without copper addition, and the dietary copper content was 9.0 mg/kg; the others in the trial groups I, Ⅱ and Ⅲ were fed basal diets supplemented with 3.0, 5.5 and 7.0 mg/kg copper, respectively. The pre-feeding period was 10 days and the trial period was 60 days. The results showed as follows:1) there were no significant differences in initial weight, final weight and average daily gain of house-feeding Tan sheep among the 4 groups (P>0.05). 2) There were no significant differences in body length, body height and bust of house-feeding Tan sheep among the 4 groups (P>0.05). The body height relative growth rate of house-feeding Tan sheep of trial group Ⅲ was significantly higher than that of control group and trial group Ⅱ (P<0.05). 3) There were no significant differences in living weight before slaughter, carcass weight, bone weight, carcass fat weight, GR value, eye muscle area, bone to meat ratio and carcass production rate of house-feeding Tan sheep among the 4 groups (P>0.05). The net meat weight of house-feeding Tan sheep of trial groups Ⅰ and Ⅱ was significantly higher than that of the control group (P<0.05), the tail fat weight of house-feeding Tan sheep of trial group Ⅲ was significantly higher than that of the control group (P<0.05). 4) There were no significant differences in pH, initial water, water loss rate, drip loss, and cooked meat rate of muscle of house-feeding Tan sheep among the 4 groups (P>0.05). The meat color redness value of house-feeding Tan sheep of trial group Ⅰwas significantly higher than that of control group and trial groups Ⅱ and Ⅲ (P<0.05), the muscle shear force of house-feeding Tan sheep of trial groups Ⅰ and Ⅱ was significantly higher than that of trial group Ⅲ (P<0.05). In summary, dietary supplemented with appropriate level copper can improve the slaughter performance and meat quality of house-feeding Tan sheep, under this experimental condition, the suitable copper supplemental level is 3.0 mg/kg (dietary copper content is 12.0 mg/kg).

Key words： Tan sheep; copper; growth performance; meat quality

Cite this article

SUN Jinsong, WANG Xue, GAO Changpeng, LI Haiqing, CHEN Xueying, TIAN Yufu, LI Zuoming, ZHOU Yuxiang . Effects of Diets With Different Copper Levels on Growth Performance, Slaughter Performance and Meat Quality of House-Feeding Tan Sheep[J]. Chinese Journal of Animal Nutrition, 2019 , 31(6) : 2927 -2932 . DOI: 10.3969/j.issn.1006-267x.2019.06.054

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