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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/52923
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dc.creatorAlyce Raiana Monteiro dos Santospt_BR
dc.creatorCarla Heloísa Avelino Cabralpt_BR
dc.creatorCarlos Eduardo Avelino Cabralpt_BR
dc.creatorLivia Vieira de Barrospt_BR
dc.creatorJackelliny Melo de Barrospt_BR
dc.creatorWelton Batista Cabralpt_BR
dc.creatorMilene Rodrigues Diaspt_BR
dc.date.accessioned2023-05-08T18:49:31Z-
dc.date.available2023-05-08T18:49:31Z-
dc.date.issued2019-
dc.citation.volume51pt_BR
dc.citation.spage2395pt_BR
dc.citation.epage2403pt_BR
dc.identifier.doihttps://doi.org/10.1007/s11250-019-01953-8pt_BR
dc.identifier.issn0049-4747pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/52923-
dc.description.resumoThis study evaluated the effect of energy and protein supplementation on the nutritional characteristics, ingestive behavior, and productive performance in grazing heifers during the rainy season. Forty crossbred heifers (Nelore breed predominance) were used in the study, with an age of 14 months and an initial mean weight of 182 ± 1.13 kg. The treatments consisted of mineral supplementation ad libitum (control) and three supplements formulated to contain an energy: protein ratio (TDN:CP) of 1.13, 2.62, and 4.06; these were denominated as low (LC, 0.5 kg animal d−1), medium (MC, 1.0 kg animal d−1), and high consumption (HC, 1.5 kg animal d−1), respectively, in order to guarantee an intake of 300 g of crude protein (CP) animal−1 d −1, with variation in energy content. There was a difference (P < 0.05) in crude protein intake, with a 44% reduction for the LC treatment in relation to HC. The lowest grazing time (398 min) was observed with the MC treatment. Urinary urea-N (UreaN) was lower for control animals (P < 0.05). Average daily gain (ADG) was lower for the control animals than for the supplemented animals (P < 0.05); there was no difference in ADG between the animals receiving supplementation. High supplementation levels and TDN:CP ratios are not recommended because they do not justify the increased costs of supplementation. Therefore, when forage presents great nutritional characteristics, it is possible to optimize the performance of the animals with low to medium consumption supplementation.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.ispartofTropical Animal Health and Production-
dc.rightsAcesso Restritopt_BR
dc.subjectIngestive behaviorpt_BR
dc.subjectNutritional characteristicspt_BR
dc.subjectPerformancept_BR
dc.subjectRuminant nutritionpt_BR
dc.subject.otherDesempenhopt_BR
dc.subject.otherRuminante - Alimentação e raçõespt_BR
dc.subject.otherBovinopt_BR
dc.subject.otherPastejopt_BR
dc.titleEnergy to protein ratios in supplements for grazing heifers in the rainy seasonpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://link.springer.com/article/10.1007/s11250-019-01953-8pt_BR
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