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Effect of Zizyphus vulgaris Supplementation on Growth Performance, Blood Cortisol and Meat Quality Characteristics in Finishing Pig  

Cho Jin-Ho (Department of Animal Resource & Sciences, Dankook University)
Han Young-Geun (National Agricultural Co-operative Federation)
Kwon Oh-Suk (Department of Animal Resource & Sciences, Dankook University)
Min Byoung-Joon (Department of Animal Resource & Sciences, Dankook University)
Son Kyoung-Seung (Department of Animal Resource & Sciences, Dankook University)
Chen Ying-Jie (Department of Animal Resource & Sciences, Dankook University)
Kim In-Ho (Department of Animal Resource & Sciences, Dankook University)
Publication Information
Food Science of Animal Resources / v.25, no.1, 2005 , pp. 20-25 More about this Journal
Abstract
This study was conducted to evaluate the effects of Zizyphus vulgaris supplementation on growth performance, blood cortisol and meat quality characteristics in finishing pigs. The total of thirty-six [Duroc${\times}$Yorkshir${\times}$Landrace] pigs ($91{\pm}2.11$ kg average initial body weight) were used in a 30-days assay. Dietary treatments included 1) CON (basal diet), 2) T1 (basal diet for 15 days and 0.1 % Zizyphus vulgaris for 15 days) and 3) T2 (0.1 % Zizyphus vulgaris for 30 days). The ADG (Average daily gain), ADFI (Average daily feed intake) and ADG/ADFI during the feeding period were not significantly differences among the treatments (p>0.05). Backfat thickness of pigs fed CON was higher than those of T1 and T2 (p<0.05). The appearance rate of A or B carcass grade was in T1 (74%) and T2 (84%) was significantly higher than that in CON (58%) (p<0.05). Pigs fed Zizyphus vulgaris 0.1 % for 30 days tended to decrease on blood cortisol compared with pigs fed CON and T1. But, there was not significantly difference among the treatments (p>0.05). The Hunter's L/sup */ (lightness) value of loin in the pork fed CON was higher than that of loin in the pork fed T1 and T2 (p<0.05). After 7 days, the L/sup */ value of loin in the pigs fed T2 was higher increased than that of pigs fed T1 and CON (p<0.05). However, a/sup */ and b/sup */ values were not affected by dietary Zizyphus vulgaris (p>0.05). There were not found remarkable differences in sensory properties (marbling, firmness and color) among the treatments. The results from the present study suggest that Zizyphus vulgaris could be a effective feed additive to improve meat quality of pigs. However, further research is needed to investigate effects of carcass characteristics.
Keywords
growth; Zizyphus vulgaris; cortisol; meat quality characteristics; pigs;
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