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Effect of Reducing Micromineral Supplementation to Grower-Finisher Pigs on Growth Performance, Hematological Status, Carcass traits and Pork Quality

Gowanlock, Daniel W.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1345493232

Abstract Details

2012, Master of Science, Ohio State University, Animal Sciences.
Grower pigs (n = 237) initially weighing 24.3 kg BW were used to evaluate the effects of reduced micromineral supplementation and varying levels of Fe and Zn on growth, feed efficiency, hematology, carcass characteristics and pork quality. A randomized complete block design with 7 dietary treatments replicated 7 times was used in the study. Treatments consisted of 1) basal diet with no added microminerals, 2) basal + 25% of NRC micromineral requirements, 3) basal + 50% of NRC micromineral requirements, 4) basal + 100% NRC micromineral requirements, 5) basal + 25 ppm Zn, 6) basal + 50 ppm Zn and 7) basal + 50 ppm Fe. Minerals were fed as mineral-proteonates and all diets incorporated organic Se-yeast at 0.3 ppm. When the average pen weight was 55, 80 and 115 kg BW pigs were bled with hemoglobin (Hb) and hematocrit (Hct) determined. At the end of the trial 3 pigs per pen were killed with carcass characteristics and meat quality measurements determined. The ADG, ADFI, and G:F for each of the 3 dietary phases and overall trial were not affected by dietary treatment (P > 0.10). The concentration of Hb and Hct volume were not different (P > 0.10) due to dietary treatment at each of the three dietary phases or the average of the trial. There were no differences in carcass characteristics such as hot carcass weight or fat free lean index (P > 0.10) due to dietary treatment. Loin pH, color (L*, a*, and b*), and moisture loss were not different (P > 0.10) by dietary treatment. The subjective marbling scores and IMF content of loin samples were also not different due to dietary treatment. Firmness scores decreased cubically (P < 0.05) as the level of all microminerals was increased. Also, loins from pigs supplemental Fe had greater (P < 0.05) firmness and wetness scores. These results indicate that there are sufficient microminerals available in a corn-soybean meal based diet to meet the grower-finisher pig’s requirement for growth and hemoglobin synthesis. There are no detrimental effects of reducing micromineral, Zn or Fe supplementation on carcass characteristics and pork quality.
Donald Mahan (Advisor)
Steve Moeller (Committee Member)
Henry Zerby (Committee Member)
William Pope (Committee Member)
62 p.
carcass; growth; microminerals; pigs

Recommended Citations

Citations

  • Gowanlock, D. W. (2012). Effect of Reducing Micromineral Supplementation to Grower-Finisher Pigs on Growth Performance, Hematological Status, Carcass traits and Pork Quality [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345493232

    APA Style (7th edition)

  • Gowanlock, Daniel. Effect of Reducing Micromineral Supplementation to Grower-Finisher Pigs on Growth Performance, Hematological Status, Carcass traits and Pork Quality. 2012. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1345493232.

    MLA Style (8th edition)

  • Gowanlock, Daniel. "Effect of Reducing Micromineral Supplementation to Grower-Finisher Pigs on Growth Performance, Hematological Status, Carcass traits and Pork Quality." Master's thesis, Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345493232

    Chicago Manual of Style (17th edition)

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© 2012, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.