Short communication: Intake, milk production, and milk fatty acid profile of dairy cows fed diets combining fresh forage with a total mixed ration

Journal of Dairy Science
A MendozaJ L Repetto

Abstract

To establish the effects of access time to high-quality temperate fresh forage (FF) on intake and performance of cows fed a total mixed ration (TMR), 9 Holstein cows were assigned to three 3 × 3 Latin squares with 20-d periods with sampling in the last 10 d. The following treatments were evaluated: 0 (T0), 4 (T4), and 8 (T8) h of daily access to FF. Forage (Lolium multiflorum) was cut daily and offered ad libitum beginning at 0800 h in individual stalls, and a TMR was offered ad libitum during the period when cows had no access to FF. Fresh forage dry matter intake (DMI) increased and TMR DMI decreased with the access time to FF, whereas total DMI was 3.0 kg higher for T4 than for T8; no differences were detected with T0. Compared with T0, 8h/d of access to FF decreased milk, protein, and casein yields, and tended to decrease fat and lactose yields, but treatment had no effect on milk composition or feed efficiency. The milk fatty acid profile in T8 had a higher content of rumenic, vaccenic, and linolenic acids compared with T0. We concluded that cows with 4h of access to high-quality FF had similar DMI and milk yields as cows fed only the TMR, but more than 4h of access reduced DMI and performance without changes in feed effic...Continue Reading

References

Oct 19, 1991·Lancet·T L Ulbricht, D A Southgate
Sep 1, 1965·Journal of Dairy Science·H F Tyrrell, J T Reid
Jan 22, 2008·The Journal of Nutrition·Dale E BaumanLance H Baumgard
Aug 15, 2008·The Journal of Dairy Research·Ronaldo E VibartJames T Green
Jun 1, 2005·Nutrition Research Reviews·C H S RuxtonM J A Simpson
Mar 4, 2010·The Journal of Dairy Research·Ernesto Morales-AlmarázFernando Vicente
Mar 1, 2007·Animal : an International Journal of Animal Bioscience·T KristensenK Søegaard

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