Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/976400
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dc.contributor.authorBALDIN, M.pt_BR
dc.contributor.authorDRESCH, R.pt_BR
dc.contributor.authorSOUZA, F.pt_BR
dc.contributor.authorFERNANDES, D.pt_BR
dc.contributor.authorGAMA, M. A. S. dapt_BR
dc.contributor.authorHARVATINE, K. J.pt_BR
dc.contributor.authorOLIVEIRA, D. E.pt_BR
dc.date.accessioned2014-07-26T06:55:39Z-
dc.date.available2014-07-26T06:55:39Z-
dc.date.created2014-01-16pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationSmall Ruminant Research, v. 116, n. 1, p. 44-50, 2014.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/976400pt_BR
dc.descriptionThe extent to which CLA supplements inhibit milk fat synthesis is highly dependent on the amount of trans-10, cis-12 CLA reaching the mammary gland. Secondary events such as changes in milk yield, dry matter intake (DMI), body weight (BW) and energy balance (EB) may also occur depending on the magnitude of milk fat depression. This study investigated the effects of feeding a rumen unprotected CLA methyl ester supplement on milk fat yield and fatty acid (FA) profile, yield of milk and other milk components, DMI and metabolic variables in dairy goats. Twenty primiparous, non-pregnant Toggenburg goats, paired by BW, days in milk (DIM) and milk yield (MY) [2.8 ± 0.4 (mean ± SEM) kg milk/day, BW of 40 ± 3.7 kg and 75 ± 3 days in milk] were used in a crossover design with 14 days treatment periods and a 6 days washout. Goats were randomly assigned to the following treatments: Control (30 g/day of calcium salts of FA) or CLA [30 g/day of a rumen unprotected CLA methyl ester supplement (29.9% trans-10, cis-12 CLA)]. There was no treatment effect on BW, milk yield, or milk protein and lactose content and yield. However, compared to Control, CLA decreased milk fat content and yield by 13.9 and 13.3%, respectively, and CLA treated goats consumed 6.5% less corn silage. The CLA treatment increased the concentration of both CLA isomers (cis-9, trans-11 and trans-10, cis-12) in milk fat. The concentration of short and medium chain milk FA (C16) was decreased by CLA, while long chain FA were increased. However, the daily secretion was lower for FA of all chain lengths in CLA treated goats. Glucose and insulin were not affected by treatment, while CLA treatment decreased non esterified FA by 22.2%. The CLA treatment improved calculated EB by 0.3 Mcal/day. Overall, CLA methyl ester supplements are effective in causing milk fat depression in lactating dairy goats and improving EB, which may be used as a nutritional tool in some circumstances.eng
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectÁcido linoleico conjugadopt_BR
dc.subjectCabras toggenburgpt_BR
dc.subjectÉster metílicopt_BR
dc.subjectRúmen biohidrogenaçãopt_BR
dc.titleCLA induced milk fat depression reduced dry matter intake and improved energy balance in dairy goats.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2014-07-26T06:55:39Zpt_BR
riaa.ainfo.id976400pt_BR
riaa.ainfo.lastupdate2014-07-25pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.smallrumres.2013.10.001eng
dc.contributor.institutionUESC; UESC; ESALQ; UESC; MARCO ANTONIO SUNDFELD DA GAMA, CNPGL; PENN STATE UNIVERSITY; UESC.pt_BR
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