title: Effect of time interval between the second Improvest® dose and slaughter and corn dried distillers grains with solubles feeding strategies on carcass composition, primal cutout, and pork quality of immunologically castrated pigs.
abstract: Effects of dried distillers grains with solubles (DDGS) feeding strategies on carcass composition, primal cutout, and lean quality of immunologically castrated (IC; n=863) pigs were evaluated, and consisted of: 1) corn-soybean meal (CS) diet (PCon); 2) CS+40% DDGS (NCon); 3) CS+40, 30, 20, or 10% DDGS fed in phases 1 to 4, respectively (SD); or 4) CS+40% DDGS fed in phase 1 to 3 and CS in phase 4 (WD). All pigs received the first dose of Improvest® at 11weeks. of age, and the second dose was administered at either 9, 7, or 5weeks. before slaughter at 24weeks. of age. The SD and WD improved carcass dressing percentage and resulted in intermediate primal cut yields and pork loin quality compared with pigs fed PCon and NCon. Increasing the time interval between second dose of Improvest® and slaughter increased adipose tissue accretion but did not affect lean quality of pork.
authors.affiliation: Department of Animal Science, University of Minnesota, St. Paul 55108, United States.
authors.forename: E K
authors.initials: EK
authors.lastname: Harris
authors.affiliation: Zoetis, Florham Park, NJ 07940, United States.
authors.forename: M A
authors.initials: MA
authors.lastname: Mellencamp
authors.affiliation: Department of Animal Science, University of Minnesota, St. Paul 55108, United States; West Central Research and Outreach Center, University of Minnesota, Morris 56267, United States.
authors.forename: L J
authors.initials: LJ
authors.lastname: Johnston
authors.affiliation: Department of Animal Science, University of Minnesota, St. Paul 55108, United States.
authors.forename: R B
authors.initials: RB
authors.lastname: Cox
authors.affiliation: Department of Animal Science, University of Minnesota, St. Paul 55108, United States. Electronic address: shurs001@umn.edu.
authors.forename: G C
authors.initials: GC
authors.lastname: Shurson
mesh_terms: D000003:Abattoirs; D000273:Adipose Tissue / Q000378:metabolism*; D000821:Animal Feed; D000822:Animal Husbandry / Q000379:methods*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001823:Body Composition; D002369:Castration / Q000379:methods*; D004032:Diet; D004041:Dietary Fats / Q000032:analysis; D002523:Edible Grain; D006801:Humans; D008297:Male; D000069466:Red Meat / Q000032:analysis* / Q000592:standards; D013025:Glycine max; D013552:Swine; D003313:Zea mays
chemical_list: D004041:Dietary Fats
keywords: Carcass composition; Dried distillers grains with solubles; Feeding strategy; Growing-finishing pigs; Immunological castration; Lean quality