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http://dx.doi.org/10.5187/JAST.2006.48.5.727

Effect of Feeding Levels and Periods of Dietary Rhus verniciflua Stokes at Finishing Stage on the Meat Quality of Pigs during Refrigerated Storage  

강선문 (Department of Animal Products and Food Science, Kangwon National University)
김동욱 (Korea Restaurant Supply Center)
이성기 (Department of Animal Products and Food Science, Kangwon National University)
Publication Information
Journal of Animal Science and Technology / v.48, no.5, 2006 , pp. 727-738 More about this Journal
Abstract
This study was carried out to investigate the effect of feeding levels and periods of Rhus verniciflua Stokes (RVS) on the quality of M. longissimus from gilts (Landrace×Yorkshire×Duroc) at finishing stage. The gilts were fed diets containing 0 (control), 2 and 4% RVS for 5 weeks (the latter feeding periods) and 8 weeks (the first feeding periods+the latter feeding periods) before slaughtering, respectively. Samples were stored at 3±0.2℃ for 8 days. Crude fat content was decreased by feeding diets of 4% RVS (p<0.05). Water-holding capacity (WHC) was higher in RVS treatments than in control during storage (p<0.05). L*(Lightness) value was higher in 5 weeks-RVS treatment than in control during storage (p<0.05). a*(Redness) and b*(yellowness) were not affected by the levels and periods of RVS supplementation. Thiobarbituric acid reactive substances (TBARS) value was lower in RVS treatment than in control (p<0.05), and the 5 weeks with 4% RVS treatment showed the highest antioxidative activity. Fatty acid compositions of pork were changed by RVS feeding levels and periods. The meat supplemented with RVS showed high levels of unsaturated fatty acid (UFA) composition and monounsaturated fatty acid (MUFA)/saturated fatty acid (SFA) ratio compared with control. The dietary 8 weeks-RVS treatments had lower stearic acid(18:0) and higher polyunsaturated fatty acid (PUFA) contents than in other treatments. Melting point of backfat also decreased by increasing the level and period of RVS supplementation (p<0.05). Therefore, RVS fed pork decreased fat content and melting point, increased WHC and UFA composition, and delayed lipid oxidation during storage.
Keywords
Dietary Rhus verniciflua Stokes; Pork quality; WHC; Lipid oxidation; Fatty acid composition;
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