This study was designed to evaluate the effects of two feeding methods on milk yield,composition and fatty acid (FA) profile obtained from dual-purpose cattle. Twenty-four Aosta Red Pied cows beyond peak of lactation were assigned to two groups and fed hay and concentrates in the proportions 0.69 and 0.31 on a dry matter basis for ten weeks. Concentrates were offered separately from forages six times a day (separate ration, SR) or as a total mixed ration (TMR). The feeding method did not significantly influence dry matter intake (16.8 vs 16.9 kg head-1 day-1 for SR- and TMR-fed cows, respectively), milk yield (17.4 vs 17.5 kg head-1 day-1), milk fat, protein and lactose contents (36.4 vs 35.2, 33.5 vs 32.8, and 47.3 vs 47.4 g kg-1) and yields (607.9 vs 613.4, 567.4 vs 572.7, and 805.5 vs 829.7 g head-1 day-1). The overall milk FA profile was very similar between groups. Milk concentrations of FA used as indirect markers of rumen function (C18:2 t10c12, odd- and branched-chain FA) and the extent of ruminal biohydrogenation were comparable (P>0.05) between SR- and TMR-fed cows, suggesting that ruminal pH did not vary considerably as a consequence of the feeding strategy applied.

Milk yield, gross composition and fatty acid profile of dual-purpose Aosta Red Pied cows fed separate concentrate-forage versus total mixed ration

RENNA, Manuela;CORNALE, Paolo;LUSSIANA, Carola;BATTAGLINI, Luca Maria;MIMOSI, Antonio
2014

Abstract

This study was designed to evaluate the effects of two feeding methods on milk yield,composition and fatty acid (FA) profile obtained from dual-purpose cattle. Twenty-four Aosta Red Pied cows beyond peak of lactation were assigned to two groups and fed hay and concentrates in the proportions 0.69 and 0.31 on a dry matter basis for ten weeks. Concentrates were offered separately from forages six times a day (separate ration, SR) or as a total mixed ration (TMR). The feeding method did not significantly influence dry matter intake (16.8 vs 16.9 kg head-1 day-1 for SR- and TMR-fed cows, respectively), milk yield (17.4 vs 17.5 kg head-1 day-1), milk fat, protein and lactose contents (36.4 vs 35.2, 33.5 vs 32.8, and 47.3 vs 47.4 g kg-1) and yields (607.9 vs 613.4, 567.4 vs 572.7, and 805.5 vs 829.7 g head-1 day-1). The overall milk FA profile was very similar between groups. Milk concentrations of FA used as indirect markers of rumen function (C18:2 t10c12, odd- and branched-chain FA) and the extent of ruminal biohydrogenation were comparable (P>0.05) between SR- and TMR-fed cows, suggesting that ruminal pH did not vary considerably as a consequence of the feeding strategy applied.
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http://onlinelibrary.wiley.com/doi/10.1111/asj.12083/pdf
feeding method; Aosta Red Pied cow; production performance; milk composition; fatty acids
Renna M.; Cornale P.; Lussiana C.; Battaglini L. M.; Turille G.; Mimosi Antonio
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/142827
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