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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/39879
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dc.creatorJulião Ribeiro Lessa Coutopt_BR
dc.creatorSeverino Delmar Junqueira Villelapt_BR
dc.creatorMário Henrique França Mourthépt_BR
dc.creatorAdalfredo Rocha Lobo Júniorpt_BR
dc.creatorRoseli Aparecida dos Santospt_BR
dc.creatorPaulo Gustavo Macedo de Almeida Martinspt_BR
dc.date.accessioned2022-03-09T12:05:33Z-
dc.date.available2022-03-09T12:05:33Z-
dc.date.issued2017-
dc.citation.volume57pt_BR
dc.citation.issue3pt_BR
dc.citation.spage563pt_BR
dc.citation.epage568pt_BR
dc.identifier.doihttps://doi.org/10.1071/AN15337pt_BR
dc.identifier.issn18360939pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/39879-
dc.description.resumoOur objective was to evaluate the productive and economic performances of bulls fed increasing levels of sugarcane tops, as a substitute for sugarcane. Sixteen, 24-month-old, Nellore bulls (initial bodyweight = 360 ± 14.7 kg) were kept in a feedlot for 84 days, receiving a high-concentrate diet (80 : 20 concentrate : roughage ratio). Four levels of substitution were evaluated: T0 = no addition of sugarcane tops; T33 = 33% substitution; T66 = 66% substitution; and T100 = total substitution of sugarcane by sugarcane tops. Dry matter, organic matter, crude protein and neutral detergent fibre intake, bodyweight gain, feed conversion and feed efficiency were evaluated as productive performance parameters, and as economic indicators, total revenue, total operating expenses, gross margin, and net margin. No effect (P ≥ 0.66) of diet was found for the studied variables. Average values of total bodyweight gain, average daily gain, feed conversion, and feed efficiency were 102 ± 10.0 kg/animal, 1.2 ± 0.12 kg/day, 8.6 ± 0.72 and 0.12 ± 0.010, respectively. Unlike other treatments, the T100 net margin was positive, because of the lower cost of acquiring sugarcane tops compared with sugarcane. Partial or total substitution of sugarcane by sugarcane tops in high-concentrate diets did not affect performance of feedlot bulls, but total substitution reduced production costs, with positive net margin. We conclude that sugarcane tops can be utilised as a low-cost roughage source in diets for beef bulls.pt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIASpt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofAnimal Production Sciencept_BR
dc.rightsAcesso Restritopt_BR
dc.subject.otherBovino de corte - Alimentação e raçõespt_BR
dc.subject.otherCana-de-açúcar como raçãopt_BR
dc.subject.otherNelore (Zebu)pt_BR
dc.subject.otherConfinamento (Animais)pt_BR
dc.titleSugarcane tops as a substitute for sugarcane in high-concentrate diets for beef bullspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.publish.csiro.au/AN/AN15337pt_BR
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