Fatty acid profile and meat quality of young bulls fed ground soybean or ground cottonseed and vitamin E.

摘要: The objective of this study was to evaluate the fatty acid profile and qualitative characteristics meat from feedlot young bulls fed ground soybean or cottonseed, with without supplementation vitamin E. A total 40 Red Norte bulls, an initial average age 20 months, BW 339±15 kg, were allotted in a completely randomized design using 2×2 factorial arrangement, two oilseeds, daily not 2500 IU experimental period for 84 days, which preceded by adaptation 28 days. treatments (SB), plus E (SBE), cottonseed (CS) (CSE). percentage diets (dry matter basis) 24% 20%, respectively. Diets isonitrogenous (13% CP) presented similar amount ether extract (6.5%). animals slaughtered at live weight 464±15 samples taken longissimus dorsi muscle measurement concentration evaluation lipid oxidation color beef. Before extraction, tissue subcutaneous fat separated analyze both tissues. Supplementation did affect concentration, (P>0.05). Subcutaneous CS diet had greater C12:0, C16:0 C18:0 contents (P<0.03). In addition, reduced C18:1 C18:2 cis-9, trans-11 (P<0.05). tended higher (P<0.11), decreased C18:1, C18:3 (P<0.05) compared SB. Δ9-desaturase index SB (P<0.01). At 42 days age, cattle rate Meat less lightness redness indices than after 14 age. conclusion, addition finishing increase saturated content dorsi. However, exhibited study, meat.