title: Cottonseed Oil in Diets for Broilers in the Pre-Starter and Starter Phases.
abstract: The objective of this study was to evaluate the effect of different levels of crude cottonseed oil in isoenergetic diets, with or without supplementation of ferrous sulfate, on performance variables, relative weight of organs, and blood parameters of broilers, and on the economic viability of diets in the periods from 1 to 7 and 1 to 21 days of age. A total of 600 male birds of the Ross line were distributed in a completely randomized design in a (4×2) factorial arrangement with eight treatments (0, 2, 4, and 6% cottonseed oil with and without ferrous sulfate), and five replicates. The following variables were studied: feed intake, weight gain, feed conversion, weight of organs, blood parameters, and yield of carcass and cuts at 21 days. No effects of the levels of cottonseed oil were found on the performance of animals aged 1 to 7 days, or on the relative weights of the organs. In this same period, the weight gain, and the relative weights of heart, liver, and intestine of the animals that received ferrous sulfate were decreased, and feed conversion was worsened. In the period from 1 to 21 days, weight gain increased linearly with the increase in the levels of cottonseed oil. Blood parameters were not influenced by the diets. Crude cottonseed oil can be utilized in diets for broilers in the periods from 1 to 7 and 1 to 21 days of age at up to 6% of inclusion, and supplementation with ferrous sulfate is unnecessary if the differences in metabolization of the cottonseed oil are considered, with and without, it during the diet formulation process.
authors.affiliation: Animal Nutrition Laboratory, Federal University of Piauí, Teresina, Piauí, Brazil.
authors.forename: Vânia Batista de Sousa
authors.initials: VB
authors.lastname: Lima
authors.affiliation: Department of Animal Science, Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Leilane Rocha Barros
authors.initials: LR
authors.lastname: Dourado
authors.affiliation: Department of Veterinary Science, Federal University of Fronteira do Sul, Realeza, Paraná, Brazil.
authors.forename: Luciana Pereira
authors.initials: LP
authors.lastname: Machado
authors.affiliation: Technical College, Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Daniel
authors.initials: D
authors.lastname: Biagiotti
authors.affiliation: Department of Animal Science, Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Stélio Bezerra Pinheiro
authors.initials: SB
authors.lastname: de Lima
authors.affiliation: Department of Veterinary Science, Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Guilherme José Bolzani de Campos
authors.initials: GJ
authors.lastname: Ferreira
authors.affiliation: Department of Animal Science, Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Leonardo Atta
authors.initials: LA
authors.lastname: Farias
authors.affiliation: Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Francinete Alves
authors.initials: FA
authors.lastname: de Sousa
authors.affiliation: Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Raian Malta
authors.initials: RM
authors.lastname: Acácio
authors.affiliation: Federal University of Piauí, Bom Jesus, Piauí, Brazil.
authors.forename: Danilo Rodrigo
authors.initials: DR
authors.lastname: Silva e Silva
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects*; D000818:Animals; D002645:Chickens; D003369:Cottonseed Oil / Q000008:administration & dosage*; D004032:Diet / Q000662:veterinary*; D006321:Heart / Q000254:growth & development; D007422:Intestines / Q000254:growth & development; D008099:Liver / Q000254:growth & development; D008297:Male; D009929:Organ Size / Q000187:drug effects; D015430:Weight Gain / Q000187:drug effects*
chemical_list: D003369:Cottonseed Oil