title: Intake, digestibility, performance, and nitrogen metabolism of feedlot-finished young bulls () fed diets containing peanut cake.
abstract: This aim of this study was to evaluate the use of peanut cake as a dietary substitute for soybean meal and to determine the effects on intake, apparent digestibility, performance, and N metabolism in feedlot-finished young bulls. Thirty-two young Nellore bulls with an average initial BW of 390 ± 43.5 kg were distributed in a completely randomized design and individually housed in stalls. The young bulls were fed Tifton 85 hay and 4 concentrate mixes containing 0, 33, 66, or 100% peanut cake replacing soybean meal. The diets were formulated to be isonitrogenous, containing 150 g/kg CP, and isocaloric (65% TDN), to have a 40:60 forage:concentrate ratio, and were provided as a total mixed ration. The experiment lasted 90 d and data were collected every 28 d. Blood and urine samples were taken during the last 6 d. Intakes of DM ( = 0.005), OM ( = 0.006), CP ( = 0.002), NDF ( = 0.022), nonfiber carbohydrates ( = 0.002), and TDN ( = 0.018) linearly decreased as the dietary inclusion of peanut cake in the diet was increased. Conversely, intake and ether extract digestibility linearly increased ( < 0.035). The average daily weight gain decreased ( = 0.015) as the peanut cake levels were increased. Plasma urea N decreased (linearly; = 0.005). Peanut cake may not be used to replace soybean meal in the diet of young feedlot-finished Nellore bulls.
authors.forename: B R
authors.initials: BR
authors.lastname: Correia
authors.forename: G G P
authors.initials: GG
authors.lastname: de Carvalho
authors.forename: R L
authors.initials: RL
authors.lastname: Oliveira
authors.forename: A J V
authors.initials: AJ
authors.lastname: Pires
authors.forename: O L
authors.initials: OL
authors.lastname: Ribeiro
authors.forename: R R
authors.initials: RR
authors.lastname: Silva
authors.forename: A G
authors.initials: AG
authors.lastname: Leão
authors.forename: P A
authors.initials: PA
authors.lastname: Oliveira
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D010367:Arachis; D001806:Blood Urea Nitrogen; D002417:Cattle / Q000502:physiology*; D004032:Diet / Q000662:veterinary; D004063:Digestion; D004435:Eating; D005247:Feeding Behavior; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D011897:Random Allocation; D013025:Glycine max; D015430:Weight Gain
chemical_list: D009584:Nitrogen