Effects of Concentrate Supplementation on Meat Quality of Pengbo Semi-Fine Wool Sheep in Tibet

JIN Yanmei, WU Junxi, LI Peng, WU Hongxin, ZHANG Xiaoqing

doi:10.3969/j.issn.1006-267x.2017.02.024

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 2: 562 - 570

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.02.024

Molecular Nutrition

Effects of Concentrate Supplementation on Meat Quality of Pengbo Semi-Fine Wool Sheep in Tibet

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1. Faculty of Marine Studies, Shandong University(Weihai), Weihai 264209, China;
2. Institute of Geographic Science and Natural Resources Research of Chinese Academy of Sciences, Beijing 100101, China;
3. Grassland Research Institute of Chinese Academy of Agricultural Sciences, Hohhot 010010, China

Received date: 2016-08-11

Online published: 2017-02-17

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Abstract

The objective of this study was to investigate the effects of concentrate supplementation on meat quality of Pengbo semi-fine wool sheep in Tibet. Thirty Pengbo semi-fine wool adult ewes were randomly assigned to three groups with 10 ewes per group by the homogeneous principle, which were farming without concentrate supplementation (G1, control) group, 200 g/d concentrate supplementation (G2) group, and 400 g/d concentrate supplementation (G3) group. The animals received supplementation at 19:30 everyday throughout the 75 days of trial period. At the end of the trial, ewes were slaughtered, and their Longissimus dorsi were collected to measure nutrient contents and histochemical characteristics. The results showed as follows:the supplementation of high level of concentrate could improve total dry matter intake, and G3 group had a significantly higher average daily gain than G1 and G2 groups (P<0.05); pH_{1 h}, pH_{24 h}, drip loss, and moisture and ash contents of meat were not significantly affected by concentrate supplementation (P>0.05), but cooked meat percentage, crude protein, intramuscular fat contents, and fiber density of meat in G3 group were significantly higher than those in G1 group (P<0.05); G2 and G3 groups had significantly higher total amino acid, essential amino acid and asparagine contents compared to G1 group (P<0.05); phenylalanine and lysine contents were significantly higher in G3 group than in G1 group(P<0.05), and there was a tendency of increase for threonine and glutamic acid proportions (0.05≤P < 0.10); the contents of saturated fatty acid, monounsaturated and polyunsaturated fatty acids of meat were not significantly affected by concentrate supplementation (P>0.05), and C18:1 trans-9 content was lower in tendency in G3 group when compared to G1 group (0.05≤P<0.10). It is concluded that concentrate supplementation enables to improve nutrient value and tenderness of meat of Pengbo semi-fine wool ewes, and the effects of 400 g/d are superior to 200 g/d.

Key words： Tibet Pengbo semi-fine wool ewe; farming; supplementation; meat quality; amino acid; fatty acid composition

Cite this article

JIN Yanmei, WU Junxi, LI Peng, WU Hongxin, ZHANG Xiaoqing . Effects of Concentrate Supplementation on Meat Quality of Pengbo Semi-Fine Wool Sheep in Tibet[J]. Chinese Journal of Animal Nutrition, 2017 , 29(2) : 562 -570 . DOI: 10.3969/j.issn.1006-267x.2017.02.024

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