title: Intake and digestibility, rumen fermentation, and concentrations of metabolites in steers fed with peanut cake.
abstract: This study evaluated peanut cake as a replacement for soybean meal in the diet of steers. We used five castrated Holstein × Zebu steers, fistulated, with average live weight 550 kg, in a 5 × 5 Latin square design. The diets were composed of Tifton hay and ground corn with peanut cake (0, 25, 50, 75, and 100 %) as a replacement for soybean meal in the concentrate. Intake (kg/day) of dry matter, neutral detergent fiber, and crude protein were not affected by peanut cake, but ether extract intake increased linearly with the level of peanut cake in the diet. The digestibility of dry matter showed a quadratic effect, with a calculated maximum regression level of 56 % at 37 % replacement. There was no effect of the level of peanut cake on metabolizable energy intake and net energy, ammonia nitrogen, rumen pH, plasma urea, and glucose concentrations. We recommend replacing soybean meal in the concentrate with up to 40 % peanut cake.
authors.affiliation: Department of Animal Science, School of Veterinary Medicine and Animal Science/Federal University of Bahia, Salvador City, Bahia State, Brazil, CEP41170-110. pazootecnista@gmail.com.
authors.forename: Paulo Andrade
authors.initials: PA
authors.lastname: de Oliveira
authors.affiliation: Department of Animal Science, School of Veterinary Medicine and Animal Science/Federal University of Bahia, Salvador City, Bahia State, Brazil, CEP41170-110. ronaldooliveira@ufba.br.
authors.forename: Ronaldo Lopes
authors.initials: RL
authors.lastname: Oliveira
authors.affiliation: Department of Animal Science, Federal University of Recôncavo da Bahia, Cruz das Almas City, Bahia State, Brazil, 44380000. sorayaluz@yahoo.com.br.
authors.forename: Soraya Maria Palma Luz
authors.initials: SM
authors.lastname: Jaeger
authors.affiliation: Department of Animal Science, Federal University of Recôncavo da Bahia, Cruz das Almas City, Bahia State, Brazil, 44380000. meiby.ufrb@gmail.com.
authors.forename: Meiby Carneiro
authors.initials: MC
authors.lastname: de Paula Leite
authors.affiliation: Department of Animal Science, Federal University of Recôncavo da Bahia, Cruz das Almas City, Bahia State, Brazil, 44380000. arbagaldo@gmail.com.
authors.forename: Adriana Regina
authors.initials: AR
authors.lastname: Bagaldo
authors.affiliation: Department of Zootecnia, Federal University of Piauí, Bom Jesus City, Piauí State, 6490000, Brazil. leilson@ufpi.edu.br.
authors.forename: Leilson Rocha
authors.initials: LR
authors.lastname: Bezerra
authors.affiliation: Department of Animal Science, School of Veterinary Medicine and Animal Science/Federal University of Bahia, Salvador City, Bahia State, Brazil, CEP41170-110. braulio@zootecnista.com.br.
authors.forename: Braulio Rocha
authors.initials: BR
authors.lastname: Correia
authors.affiliation: Department of Animal Science, School of Veterinary Medicine and Animal Science/Federal University of Bahia, Salvador City, Bahia State, Brazil, CEP41170-110. nivaldobsf-ufba@yahoo.com.br.
authors.forename: Nivaldo Barreto
authors.initials: NB
authors.lastname: de Santana Filho
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D010367:Arachis / Q000737:chemistry*; D002417:Cattle / Q000502:physiology*; D004032:Diet / Q000662:veterinary*; D004063:Digestion; D005285:Fermentation; D008297:Male; D012417:Rumen / Q000378:metabolism*
keywords: Blood urea nitrogen; Byproducts; Energy; N-NH3