Milk fatty acid profile of Holstein x Gyr cows on 'Marandu' grass pasture under different grazing strategies

Abstract: The objective of this work was to evaluate the milk fatty acid (FA) profile of Holstein x Gyr cows subjected to two different grazing managements (fixed and variable rest periods) of Urochloa brizantha 'Marandu' pastures. A randomized complete block design was used, with two replicates of pasture areas (blocks) per treatment and four cows per block. Milk production and composition were not affected by grazing strategies. No treatment effects were observed on the proportions (g 100 g-1 of total FA) of the main FAs (palmitic, linoleic, and α-linolenic) of the pasture, but their intakes (grams per day) were affected by differences in forage dry matter intake. The concentrations of FAs in milk plasma and fat were not affected by the treatments. Milk fat contents of rumenic, vaccenic, oleic, and α-linolenic acids varied from 0.71 to 0.93, 1.40 to 1.50, 19.40 to 19.70, and 0.39 to 0.43 g 100 g-1 total FAs, respectively. Grazing strategies of U.brizantha 'Marandu' cause no changes on the milk fatty acid profile of cows.

Bibliographic Details

Main Authors:	Silva,Bárbara Cardoso da Mata e, Rodriguez,Norberto Mario, Morenz,Mirton José Frota, Gama,Marco Antônio Sundfeld da, Martins,Carlos Eugênio, Paciullo,Domingos Sávio Campos, Gomide,Carlos Augusto de Miranda, Anjos,Albert José dos, Madeiro,Afrânio Silva, Lopes,Fernando César Ferraz
Format:	Digital revista
Language:	English
Published:	Embrapa Secretaria de Pesquisa e Desenvolvimento 2017
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800652
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