Ruminal metabolic parameters and milk fatty acid profile of cows grazing Marandu grass supplemented with roasted soybeans.

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dc.contributorMÁRIO HENRIQUE FRANÇA MOURTHÉ, UFMG
dc.contributorFERNANDO CESAR FERRAZ LOPES, CNPGL
dc.contributorRONALDO BRAGA REIS, UFMG
dc.contributorMARCO ANTONIO SUNDFELD DA GAMA, CNPGL
dc.contributorMIRTON JOSE FROTA MORENZ, CNPGL
dc.contributorBERNARDO MURTA SALOMÃO, BMS Consultoria.
dc.creatorMOURTHÉ, M. H. F.
dc.creatorLOPES, F. C. F.
dc.creatorREIS, R. B.
dc.creatorGAMA, M. A. S. da
dc.creatorMORENZ, M. J. F.
dc.creatorSALOMÃO, B. M.
dc.date2019-09-03T19:08:21Z
dc.date2019-09-03T19:08:21Z
dc.date2019-04-22
dc.date2019
dc.date2020-01-03T11:11:11Z
dc.date.accessioned2026-07-07T03:47:25Z
dc.descriptionAbstract The goal of this study was to evaluate the ruminal metabolic parameters and milk fatty acid composition of cows managed under continuous grazing on Marandu grass. Four rumen-cannulated Holstein x Gyr cows with an average milk yield of 21±2 kg day-1 and 79±16 days in milk were used in a 4 x 4 Latin Square design. Each cow received 6 kg day-1 of a concentrate formulated with 0 (control), 1.3, 2.6 or 3.9 kg of roasted soybeans (as-fed basis), which were the experimental treatments. The inclusion of roasted soybeans promoted a linear reduction in the acetate concentration, with no effect on the pH and ruminal ammonia N concentration. There was no effect of the treatments on the ruminal degradability of the dry matter and neutral detergent fiber of Marandu grass or on the kinetic parameters of the fluids in the rumen. There were linear increases in the contents of fat and total solids in the milk and a linear decrease in the milk lactose content, but there was no effect of the treatments on the yield of these components or on milk yield. There were linear increases in milk fat stearic, elaidic, oleic, linoleic and α-linolenic acidis contents, but there was no effect of the treatments on the milk fat contents of vaccenic and rumenic acids. Notably, supplementing Marandu grass with a concentrate containing up to 3.9 kg of roasted soybeans improved the nutritional quality of the milk fat due to increases in the milk fat contents of oleic and α-linolenic acids, which are considered beneficial to human health, and reductions in the levels of lauric, myristic and palmitic, which are considered hypercholesterolemic fatty acids.
dc.identifierSemina: Ciências Agrárias, Londrina, v. 40, n. 2, p. 745-766, mar./abr. 2019.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1108380
dc.identifier10.5433/1679-0359.2019v40n2p745
dc.identifier.urihttp://hdl.handle.net/123456789/442940
dc.languageeng
dc.rightsopenAccess
dc.subjectRumenic acid
dc.subjectRuminal metabolite
dc.titleRuminal metabolic parameters and milk fatty acid profile of cows grazing Marandu grass supplemented with roasted soybeans.
dc.typeArtigo de periódico

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