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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/67860
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dc.creatorHelena Ferreira Lagept_BR
dc.creatorAndré Santos de Souzapt_BR
dc.creatorAntônio Último de Carvalhopt_BR
dc.creatorElias Jorge Facury Filhopt_BR
dc.creatorEdilane Aparecida Silvapt_BR
dc.creatorJoana Ribeiro da Glóriapt_BR
dc.creatorAlexandre Lima Ferreirapt_BR
dc.creatorRodrigo Melo Menesespt_BR
dc.creatorEloísa de Oliveira Simões Salibapt_BR
dc.creatorAna Luiza da Costa Cruz Borgespt_BR
dc.creatorRicardo Reis e Silvapt_BR
dc.creatorAlan Maia Borgespt_BR
dc.creatorJosé Reinaldo Mendes Ruaspt_BR
dc.creatorPedro Henrique Araújo de Carvalhopt_BR
dc.creatorMarcelina Pereira da Fonsecapt_BR
dc.creatorPaolo Antônio Dutra Vivenzapt_BR
dc.creatorLúcio Carlos Gonçalvespt_BR
dc.date.accessioned2024-04-29T19:35:12Z-
dc.date.available2024-04-29T19:35:12Z-
dc.date.issued2021-02-04-
dc.citation.volume16pt_BR
dc.citation.issue2pt_BR
dc.citation.spage1pt_BR
dc.citation.epage13pt_BR
dc.identifier.doi10.1371/journal.pone.0246208pt_BR
dc.identifier.issn1932-6203pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/67860-
dc.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).pt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentVET - DEPARTAMENTO DE CLÍNICA E CIRURGIApt_BR
dc.publisher.departmentVET - DEPARTAMENTO DE ZOOTECNIApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofPublic Library of Science Onept_BR
dc.rightsAcesso Abertopt_BR
dc.subjectzebu cattlept_BR
dc.subject.otherPrenhezpt_BR
dc.subject.otherGado Zebupt_BR
dc.subject.otherGado Leiteiropt_BR
dc.subject.otherMetabolismo Energéticopt_BR
dc.titleEnergy metabolism of pregnant zebu and crossbred zebu dairy cattlept_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0246208pt_BR
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