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Titolo:
Fatty acid composition, including conjugated linoleic acid, of intramuscular fat from steers offered grazed grass, grass silage, or concentrate-baseddiets
Autore:
French, P; Stanton, C; Lawless, F; ORiordan, EG; Monahan, FJ; Caffrey, PJ; Moloney, AP;
Indirizzi:
TEAGASC, Grange Res Ctr, Dunsany, Meath, Ireland TEAGASC Dunsany Meath Ireland C, Grange Res Ctr, Dunsany, Meath, Ireland Univ Coll Dublin, Fac Agr, Dublin 4, Ireland Univ Coll Dublin Dublin Ireland 4 oll Dublin, Fac Agr, Dublin 4, Ireland TEAGASC, Dairy Prod Res Ctr, Fermoy, Cork, Ireland TEAGASC Fermoy Cork Ireland C, Dairy Prod Res Ctr, Fermoy, Cork, Ireland
Titolo Testata:
JOURNAL OF ANIMAL SCIENCE
fascicolo: 11, volume: 78, anno: 2000,
pagine: 2849 - 2855
SICI:
0021-8812(200011)78:11<2849:FACICL>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
GROUND-BEEF; BOVINE-MILK; FEED; FLAVOR; GROWTH; TISSUE; FORAGE; TIME; CLA;
Keywords:
conjugated linoleic acid; fatty acids; grasses; steers;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Moloney, AP TEAGASC, Grange Res Ctr, Dunsany, Meath, Ireland TEAGASC Dunsany Meath Ireland s Ctr, Dunsany, Meath, Ireland
Citazione:
P. French et al., "Fatty acid composition, including conjugated linoleic acid, of intramuscular fat from steers offered grazed grass, grass silage, or concentrate-baseddiets", J ANIM SCI, 78(11), 2000, pp. 2849-2855

Abstract

The effects of grazed grass, grass silage, or concentrates on fatty acid composition and conjugated linoleic acid (cis-9, trans-11-18:2; CLA) concentrations of i.m. fat of steers fed to achieve similar carcass growth rates were investigated. Fifty steers were divided into 10 blocks based on body weight and assigned at random from within blocks to one of five dietary treatments. The experimental rations offered daily for 85 d preceding slaughter were 1) grass silage for ad libitum intake plus 4 kg of concentrate, 2) 8 kg of concentrate plus 1 kg of hay, 3) 6 kg of grazed grass DM plus 5 kg of concentrate, 4) 12 kg of grazed grass DM plus 2.5 kg concentrate, or 5) 22 kg of grazed grass DM. The concentration of polyunsaturated fatty acids (PUFA) in i.m. fat was higher (P < .05) for steers offered ration 5 than for those given any other ration. Decreasing the proportion of concentrate in the diet, which effectively increased grass intake, caused a linear decrease in the concentration of i.m. saturated fatty acids (SFA) (P < .01) and in the n-6:n-3 PUFA ratio (P < .001) and a linear increase in the PUFA:SFA ratio (P < .01) and the conjugated linoleic acid concentration (P < .001). The data indicate that i.m. fatty acid composition of beef can be improved froma human health perspective by inclusion of grass in the diet.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 20:02:34