title: Effect of including sweet potato (Ipomoea batatas Lam) meal in finishing pig diets on growth performance, carcass traits and pork quality.
abstract: The partial replacement of a commercial concentrate at 10-20% and 15-30% (the first percentage of each dietary treatment corresponded to weeks 1-3 and the second to weeks 4-7 of the experiment, respectively) by sweet potato meal (SPM; 70% foliage: 30% roots) was evaluated for growth performance, carcass yield, instrumental and sensory pork quality using 36 commercial crossbred pigs (56.8 ± 1.3 kg initial body weight). Three dietary treatments were compared in a randomized complete block design. Most growth, carcass traits and pork quality variables were not affected by the SPM inclusion. Growth performance averaged 868 g/day and feed efficiency 0.24 kg/kg. However, feed intake increased 2.2% (P = 0.04) in pigs fed the 10-20% SPM diets, in a similar order of magnitude as the decrease in dietary energy. Despite an increase in gastrointestinal tract as a percent of hot carcass weight (+14.7%) (P = 0.03) with SPM inclusion, carcass yield averaged 69.4%. Conversely, decreases in loin yield (-4.2%) (P = 0.05), backfat thickness (-6.0%) (P < 0.01) and pork tenderness (-13%) (P = 0.02) were observed with 15-30% SPM inclusion. Results suggest that up to 20% SPM inclusion is a viable feed strategy for finishing pigs, easily replicable in small farm settings. © 2016 Japanese Society of Animal Science.
authors.affiliation: Departamento de Zootecnia, Facultad de Agronomía, La Universidad del Zulia, Avenida 16 Goajira, Ciudad Universitaria "Dr. Antonio Borjas Romero", Nucleo Agropecuario, Maracaibo, Zulia, Venezuela. Silvana.Pietrosemoli.09@gmail.com.|Department of Animal Science, North Carolina State University, Raleigh, NC, USA. Silvana.Pietrosemoli.09@gmail.com.
authors.forename: Silvana
authors.initials: S
authors.lastname: Pietrosemoli
authors.affiliation: Departamento de Zootecnia, Facultad de Agronomía, La Universidad del Zulia, Avenida 16 Goajira, Ciudad Universitaria "Dr. Antonio Borjas Romero", Nucleo Agropecuario, Maracaibo, Zulia, Venezuela.
authors.forename: Oneida Elizabeth
authors.initials: OE
authors.lastname: Moron-Fuenmayor
authors.affiliation: Departamento de Zootecnia, Facultad de Agronomía, La Universidad del Zulia, Avenida 16 Goajira, Ciudad Universitaria "Dr. Antonio Borjas Romero", Nucleo Agropecuario, Maracaibo, Zulia, Venezuela.
authors.forename: Angel
authors.initials: A
authors.lastname: Paez
authors.affiliation: Departamento de Producción Agraria, E.T.S. Ingenieros Agrónomos, Universidad Politécnica de Madrid, Madrid, Spain.
authors.forename: Maria Jesús
authors.initials: MJ
authors.lastname: Villamide
mesh_terms: D000821:Animal Feed / Q000191:economics; D000824:Animal Nutritional Physiological Phenomena / Q000502:physiology*; D000818:Animals; D017046:Cost Savings; D004032:Diet / Q000662:veterinary*; D004435:Eating / Q000502:physiology; D005260:Female; D063427:Food Quality; D027723:Ipomoea batatas; D008297:Male; D008460:Meat; D019655:Quantitative Trait, Heritable; D013552:Swine / Q000254:growth & development* / Q000502:physiology
keywords: carcass; performance; pork quality; sensorial; sweet potato