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Effects of supplemental manganese on performance of growing-finishing pigs and pork quality during retail display.
J Anim Sci. 2007 Apr; 85(4):1046-53.JA

Abstract

Crossbred barrows and gilts (n = 168) were used to test the effects of supplemental Mn during the growing-finishing period on performance, pork carcass characteristics, and pork quality during 7 d of retail display. Pigs were blocked by BW and allotted within blocks to pens (5 pigs/pen in blocks 1, 2, 5, and 6, and 4 pigs/pen in blocks 3 and 4). A total of 36 pens was randomly assigned to 1 of 6 dietary treatments, where the basal diets were formulated with (PC) or without (NC) Mn in the mineral premix, and supplemented with 0 or 350 ppm (as-fed basis) of Mn from MnSO4 or a Mn-AA complex (AvMn). Pigs were slaughtered at a commercial pork packing plant when the lightest block of pigs averaged 113.6 kg. During fabrication, boneless pork loins were collected and transported to Oklahoma State University, where 2.5-cm-thick LM chops were packaged in a modified atmosphere (80% O2 and 20% CO2) and subsequently placed in display cases (2 to 4 degrees C) under continuous fluorescent lighting (1,600 lx) for 7 d. Pig performance was not (P > or = 0.44) affected by supplemental Mn; however, during the grower-II phase, pigs fed the basal diets including Mn consumed less (P < 0.02) feed and tended to be more efficient (P < 0.09) than pigs fed the basal diets devoid of Mn. Throughout the entire feeding trial, neither dietary nor supplemental Mn altered (P > or = 0.22) ADG, ADFI, or G:F. Chops from pigs fed the diets supplemented with MnSO4 received greater (P < or = 0.05) lean color scores and had a redder (greater a* and hue angle values), more vivid color than chops from pigs fed the diets supplemented with AvMn. Additionally, LM chops from pigs fed the PC diets supplemented with MnSO4 were darker (lower L* values; P < 0.05) than chops from pigs fed the NC diets or PC diets supplemented with 0 or 350 ppm of AvMn. Even though discoloration scores were similar during the first 4 d of display, chops from pigs fed the PC diets supplemented with MnSO4 were less (P < 0.05) discolored on d 6 and 7 of retail display than chops from pigs fed the PC or NC diets and diets supplemented with AvMn (dietary treatment x display time, P = 0.04). Results of this study indicate that feeding an additional 350 ppm of Mn from MnSO4 above the maintenance requirements of growing-finishing pigs does not beneficially affect live pig performance but may improve pork color and delay discoloration of pork during retail display.

Authors+Show Affiliations

Department of Animal Sciences, University of Arkansas, Fayetteville 72701, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17178808

Citation

Sawyer, J T., et al. "Effects of Supplemental Manganese On Performance of Growing-finishing Pigs and Pork Quality During Retail Display." Journal of Animal Science, vol. 85, no. 4, 2007, pp. 1046-53.
Sawyer JT, Tittor AW, Apple JK, et al. Effects of supplemental manganese on performance of growing-finishing pigs and pork quality during retail display. J Anim Sci. 2007;85(4):1046-53.
Sawyer, J. T., Tittor, A. W., Apple, J. K., Morgan, J. B., Maxwell, C. V., Rakes, L. K., & Fakler, T. M. (2007). Effects of supplemental manganese on performance of growing-finishing pigs and pork quality during retail display. Journal of Animal Science, 85(4), 1046-53.
Sawyer JT, et al. Effects of Supplemental Manganese On Performance of Growing-finishing Pigs and Pork Quality During Retail Display. J Anim Sci. 2007;85(4):1046-53. PubMed PMID: 17178808.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of supplemental manganese on performance of growing-finishing pigs and pork quality during retail display. AU - Sawyer,J T, AU - Tittor,A W, AU - Apple,J K, AU - Morgan,J B, AU - Maxwell,C V, AU - Rakes,L K, AU - Fakler,T M, Y1 - 2006/12/18/ PY - 2006/12/21/pubmed PY - 2007/4/24/medline PY - 2006/12/21/entrez SP - 1046 EP - 53 JF - Journal of animal science JO - J Anim Sci VL - 85 IS - 4 N2 - Crossbred barrows and gilts (n = 168) were used to test the effects of supplemental Mn during the growing-finishing period on performance, pork carcass characteristics, and pork quality during 7 d of retail display. Pigs were blocked by BW and allotted within blocks to pens (5 pigs/pen in blocks 1, 2, 5, and 6, and 4 pigs/pen in blocks 3 and 4). A total of 36 pens was randomly assigned to 1 of 6 dietary treatments, where the basal diets were formulated with (PC) or without (NC) Mn in the mineral premix, and supplemented with 0 or 350 ppm (as-fed basis) of Mn from MnSO4 or a Mn-AA complex (AvMn). Pigs were slaughtered at a commercial pork packing plant when the lightest block of pigs averaged 113.6 kg. During fabrication, boneless pork loins were collected and transported to Oklahoma State University, where 2.5-cm-thick LM chops were packaged in a modified atmosphere (80% O2 and 20% CO2) and subsequently placed in display cases (2 to 4 degrees C) under continuous fluorescent lighting (1,600 lx) for 7 d. Pig performance was not (P > or = 0.44) affected by supplemental Mn; however, during the grower-II phase, pigs fed the basal diets including Mn consumed less (P < 0.02) feed and tended to be more efficient (P < 0.09) than pigs fed the basal diets devoid of Mn. Throughout the entire feeding trial, neither dietary nor supplemental Mn altered (P > or = 0.22) ADG, ADFI, or G:F. Chops from pigs fed the diets supplemented with MnSO4 received greater (P < or = 0.05) lean color scores and had a redder (greater a* and hue angle values), more vivid color than chops from pigs fed the diets supplemented with AvMn. Additionally, LM chops from pigs fed the PC diets supplemented with MnSO4 were darker (lower L* values; P < 0.05) than chops from pigs fed the NC diets or PC diets supplemented with 0 or 350 ppm of AvMn. Even though discoloration scores were similar during the first 4 d of display, chops from pigs fed the PC diets supplemented with MnSO4 were less (P < 0.05) discolored on d 6 and 7 of retail display than chops from pigs fed the PC or NC diets and diets supplemented with AvMn (dietary treatment x display time, P = 0.04). Results of this study indicate that feeding an additional 350 ppm of Mn from MnSO4 above the maintenance requirements of growing-finishing pigs does not beneficially affect live pig performance but may improve pork color and delay discoloration of pork during retail display. SN - 1525-3163 UR - https://www.unboundmedicine.com/medline/citation/17178808/Effects_of_supplemental_manganese_on_performance_of_growing_finishing_pigs_and_pork_quality_during_retail_display_ L2 - https://academic.oup.com/jas/article-lookup/doi/10.2527/jas.2006-262 DB - PRIME DP - Unbound Medicine ER -