Energy metabolism of pregnant zebu and crossbred zebu dairy cattle

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dc.creatorHelena Ferreira Lage
dc.creatorAndré Santos de Souza
dc.creatorAntônio Último de Carvalho
dc.creatorElias Jorge Facury Filho
dc.creatorEdilane Aparecida Silva
dc.creatorJoana Ribeiro da Glória
dc.creatorAlexandre Lima Ferreira
dc.creatorRodrigo Melo Meneses
dc.creatorEloísa de Oliveira Simões Saliba
dc.creatorAna Luiza da Costa Cruz Borges
dc.creatorRicardo Reis e Silva
dc.creatorAlan Maia Borges
dc.creatorJosé Reinaldo Mendes Ruas
dc.creatorPedro Henrique Araújo de Carvalho
dc.creatorMarcelina Pereira da Fonseca
dc.creatorPaolo Antônio Dutra Vivenza
dc.creatorLúcio Carlos Gonçalves
dc.date.accessioned2024-04-29T19:35:12Z
dc.date.accessioned2025-09-09T01:07:39Z
dc.date.available2024-04-29T19:35:12Z
dc.date.issued2021-02-04
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.format.mimetypepdf
dc.identifier.doi10.1371/journal.pone.0246208
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/1843/67860
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofPublic Library of Science One
dc.rightsAcesso Aberto
dc.subjectPrenhez
dc.subjectGado Zebu
dc.subjectGado Leiteiro
dc.subjectMetabolismo Energético
dc.subject.otherzebu cattle
dc.titleEnergy metabolism of pregnant zebu and crossbred zebu dairy cattle
dc.typeArtigo de periódico
local.citation.epage13
local.citation.issue2
local.citation.spage1
local.citation.volume16
local.description.resumoThe purpose of this study was to determine the energy partition of pregnant F1 Holstein x Gyr with average initial body weight (BW) of 515.6 kg and Gyr cows with average initial BW of 435.1 kg at 180, 210 and 240 days of gestation, obtained using respirometry. Twelve animals in two groups (six per genetic group) received a restricted diet equivalent to 1.3 times the net energy for maintenance (NEm). The proportion of gross energy intake (GEI) lost as feces did not differ between the evaluated breeds and corresponded to 28.65% on average. The daily methane production (L/d) was greater for (P<0.05) F1 HxG compared to Gyr animals. However, when expressed as L/kg dry matter (DM) or as percentage of GEI there were no differences between the groups (P>0.05). The daily loss of energy as urine (mean of 1.42 Mcal/d) did not differ (P>0.05) between groups and ranged from 3.87 to 5.35% of the GEI. The metabolizable energy intake (MEI) of F1 HxG animals was greater (P < 0.05) at all gestational stages compared to Gyr cows when expressed in Mcal/d. However, when expressed in kcal/kg of metabolic BW (BW0,75), the F1 HxG cows had MEI 11% greater (P<0.05) at 240 days of gestation and averaged 194.39 kcal/kg of BW0,75. Gyr cows showed no change in MEI over time (P>0.05), with a mean of 146.66 kcal/kg BW0. 75. The ME used by the conceptus was calculated by deducting the metabolizable energy for maintenance (MEm) from the MEI, which was obtained in a previous study using the same cows prior to becoming pregnant. The values of NEm obtained in the previous study with similar non-pregnant cows were 92.02 kcal/kg BW0.75 for F1 HxG, and 76.83 kcal/kg BW0.75 for Gyr (P = 0.06). The average ME for pregnancy (MEp) was 5.33 Mcal/d for F1 HxG and 4.46 Mcal/d for Gyr. The metabolizability ratio, averaging 0.60, was similar among the evaluated groups (P>0.05). The ME / Digestible Energy (DE) ratio differed between groups and periods evaluated (P<0.05) with a mean of 0.84. The heat increment (HI) accounted for 22.74% and 24.38% of the GEI for F1 HxG and Gyr cows, respectively. The proportion of GEI used in the basal metabolism by pregnant cows in this study represented 29.69%. However, there were no differences between the breeds and the evaluation periods and corresponded to 29.69%. The mean NE for pregnancy (NEp) was 2.76 Mcal/d and did not differ between groups and gestational stages (P>0.05).
local.publisher.countryBrasil
local.publisher.departmentVET - DEPARTAMENTO DE CLÍNICA E CIRURGIA
local.publisher.departmentVET - DEPARTAMENTO DE ZOOTECNIA
local.publisher.initialsUFMG
local.url.externahttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0246208

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