title: Detoxified castor meal in substitution of soybean meal in sheep diet: growth performance, carcass characteristics and meat yield.
abstract: The aim of this study was to evaluate the intake, digestibility, performance, and carcass characteristics of lambs fed different levels of replacement (0, 15, 30, and 45 % based on dry matter, DM) of soybean meal (SM) by detoxified castor meal (DCM). Twenty-four and 32 intact hair lambs of nondescript breed (21.7 ± 2.6 kg of initial average body weight and approximately 10 months old) were used, respectively, in the intake and digestibility and performance experiments. The diets were composed of buffel grass hay, ground corn grain, and different levels of SM, DCM, and urea, in a roughage-to-concentrate ratio of 40:60. There was no effect of treatments on DM intake. However, crude protein (CP) and neutral detergent fiber (NDF) intakes were higher at 30 and 45 % than at 0 and 15 % of DCM, which in turn showed higher intake of non-fiber carbohydrates (NFC) (P < 0.05). The organic matter, CP, and NDF digestibilities were not affected, but the digestibility of NFC was lower at 30 and 45 % than at 0 % of DCM (P < 0.05). The average daily gain, feed conversion, slaughter and carcass weights, chilling losses, ribeye area, and absolute values and yields of neck, ribs, loin, and leg were not affected. However, the carcass yield was lower at 45 % of DCM and the absolute value of shoulder was lower at 30 and 45 % of DCM (P < 0.05). The replacement of SM by DCM up to 45 % in the feed of lambs did not negatively affect the intake, digestibility, performance, and main carcass features.
authors.affiliation: Department of Veterinary, Universidade Federal do Vale do São Francisco-UNIVASF, Petrolina, Pernambuco, 56300-990, Brazil.
authors.forename: Daniel Ribeiro
authors.initials: DR
authors.lastname: Menezes
authors.affiliation: Department of Agricultural Sciences, Universidade Federal da Paraíba-UFPB, Bananeiras, Paraíba, 58220-000, Brazil.
authors.forename: Roberto Germano
authors.initials: RG
authors.lastname: Costa
authors.affiliation: Empresa Brasileira de Pesquisa Agropecuária-Semiarid Embrapa, Petrolina, Pernambuco, 56302-970, Brazil.
authors.forename: Gherman Garcia Leal
authors.initials: GG
authors.lastname: de Araújo
authors.affiliation: Empresa Brasileira de Pesquisa Agropecuária-Dairy Cattle Embrapa, Juiz de Fora, Minas Gerais, 36038-330, Brazil.
authors.forename: Luiz Gustavo Ribeiro
authors.initials: LG
authors.lastname: Pereira
authors.affiliation: Instituto Nacional do Semi-Árido-INSA, Campina Grande, Paraíba, 58434-700, Brazil.
authors.forename: Geovergue Rodrigues
authors.initials: GR
authors.lastname: de Medeiros
authors.affiliation: Department of Agricultural Sciences, Universidade Federal da Paraíba-UFPB, Bananeiras, Paraíba, 58220-000, Brazil.
authors.forename: Juliana Silva
authors.initials: JS
authors.lastname: Oliveira
authors.affiliation: Department of Animal Science, Universidade Federal da Bahia-UFBA, Salvador, Bahia, 40170-110, Brazil.
authors.forename: Thiago Vinicius Costa
authors.initials: TV
authors.lastname: Nascimento
authors.affiliation: Departament of Animal Science, Universidade Federal de Lavras-UFLA, Lavras, Minas Gerais, 37200-000, Brazil. rafael.nutricao@hotmail.com.
authors.forename: Rafael Torres
authors.initials: RT
authors.lastname: de Souza Rodrigues
authors.affiliation: Department of Veterinary, Universidade Federal de Campina Grande-UFCG, Patos, Paraíba, 58700-970, Brazil.
authors.forename: José Morais Pereira
authors.initials: JM
authors.lastname: Filho
authors.affiliation: Departament of Animal Science, Universidade Federal de Lavras-UFLA, Lavras, Minas Gerais, 37200-000, Brazil.
authors.forename: Karina Costa
authors.initials: KC
authors.lastname: Busato
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D000831:Animals, Newborn / Q000254:growth & development; D001823:Body Composition; D001835:Body Weight; D002367:Ricinus communis; D004032:Diet / Q000662:veterinary*; D004063:Digestion; D008460:Meat; D012756:Sheep / Q000254:growth & development*; D013025:Glycine max
keywords: Biodiesel; Byproduct; Lambs; Performance; Protein concentrate; Ricinus communis