Feed energy utilization by hair sheep: does the 0.82 conversion factor of digestible to metabolizable energy need to be revised?

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dc.creatorAntônio de Sousa Brito Neto
dc.creatorCaio Júlio Lima Herbster
dc.creatorLuciana Castro Geraseev
dc.creatorGilberto de Lima Macedo Junior
dc.creatorDayanne Ribeiro do Nascimento
dc.creatorAmanda Cardoso Rocha
dc.creatorMaria Izabel Batista Pereira
dc.creatorMarcos Inácio Marcondes
dc.creatorLuciano Pinheiro da Silva
dc.creatorLeilson Rocha Bezerra
dc.creatorRonaldo Lopes Oliveira
dc.creatorElzania Sales Pereira
dc.date.accessioned2024-10-01T21:50:19Z
dc.date.accessioned2025-09-08T23:17:15Z
dc.date.available2024-10-01T21:50:19Z
dc.date.issued2023-12-14
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1017/S0021859623000515
dc.identifier.issn1469-5146
dc.identifier.urihttps://hdl.handle.net/1843/77107
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofThe Journal of Agricultural Science
dc.rightsAcesso Restrito
dc.subjectOvinos
dc.subjectAlimentação dos animais
dc.subjectConfinamento (Animais)
dc.titleFeed energy utilization by hair sheep: does the 0.82 conversion factor of digestible to metabolizable energy need to be revised?
dc.typeArtigo de periódico
local.citation.epage742
local.citation.issue5
local.citation.spage734
local.citation.volume161
local.description.resumoThe objective was to evaluate energy partitioning and predict the relationship between metabolizable energy (ME) and digestible energy (DE) in hair sheep fed tropical diets at three feeding levels (maintenance, intermediate and high). To evaluate the energy partition, a database with 114 records (54 non-castrated males and 60 females) from comparative slaughter studies was used. To estimate the ratio ME:DE, 207 observations (74 non-castrated males and 133 females) were used from six studies in a multi-study approach, two indirect calorimetry studies (n = 93) and four comparative slaughter (n = 114), using a mixed model and study as random effect. A simple linear regression equation of the ME against DE was fitted to predict the efficiency of DE to ME conversion. Gas losses were greatest (P < 0.05) for animals fed at maintenance level (7.92% of gross energy intake). The variations of energy losses in the urine were 2.64, 2.06 and 2.08%; faecal losses were 34.37, 37.80 and 36.91% for maintenance, intermediary and high level of feeding, respectively. The regression analysis suggested a strong linear relationship between ME and DE, generating the model ME (MJ/day) = −0.1559 (±0.07525) + 0.8503 (±0.005864) × DE (MJ/day). This study highlights the importance of the relationship ME:DE. Equation/factor 0.85 presented herein is alternative that could be used for the calculation of ME from DE in feedlot diets tropical. In conclusion, we suggest that for hair sheep fed tropical diets the conversion factor 0.85 is more adequate to predict ME from DE.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://www.cambridge.org/core/journals/journal-of-agricultural-science/article/feed-energy-utilization-by-hair-sheep-does-the-082-conversion-factor-of-digestible-to-metabolizable-energy-need-to-be-revised/73D548D65DF3D924D57C6B24EF3393B0

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