Effects of Supplemental Manganese Source on the Pork Quality During Seven Days of Retail Display

摘要

Loins from 168 crossbred pigs were used to test the effects of supplemental manganese (Mn) on pork quality during 7 d of retail display. Loins were from pigs assigned randomly to one of six dietary treatments arranged in a 2 x 3 factorial design withMn present (+Mn) or absent (-Mn) in the basal diet and 0 or 350 ppm of supplemental Mn from either Mn sulfate (MnSO~4) or AvailaMn-80 (AvMn). Bone-in loins were collected during fabrication and shipped to Oklahoma State University for quality data collection. Loins were cut into longissimus muscle (LM) chops and placed in a modified atmosphere package (80% O2:20% CO~2) for 7 d of retail display. Chops from pigs fed diets supplemented with MnSO~4 received higher (P < 0.05) lean color scores, were redder,and more vivid than chops from pigs fed diets supplemented with AvMn. Moreover, chops from pigs fed basal diets +Mn and supplemental MnSO~4 received higher (P < 0.05) color scores than all other treatment combinations, and were darker (P < 0.05) than chops from pigs fed the basal diet -Mn or the basal +Mn and supplemented with AvMn. Discoloration was reduced over the last 3 d of retail display by inclusion of Mn in the basal diets and supplemented with MnSO~4. Results suggest that supplementing 350 ppmMn from MnSO~4 to swine diets formulated to meet maintenance Mn requirements improves pork color and reduces discoloration during retail display.