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The Influence of Forage/Concentrate Ratio and Full Fat Soya By-Pass Supplementation on the Fatty Acids Profile from the Carcase of Fatting Lambs

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Mierliţã Daniel, C. Pascal, Stelian Dãrãban, F. G. Lup, Cristina Maerescu

Editorial: David Publishing, USA, Journal of Agricultural Science and Technology, Volume 5, No.1 (Serial No.32), p.67 - 76, 2011.


There was organized a 2×2 factorial type experience in which it has been aimed the influence of forage/concentrates ratio and the effect of supplementing the ratio with full fat soya by-pass (FFS) on the production performance and carcass fatty acid profile of fattening lambs. 32 Tsigai lambs were divided into 4 groups and were fed with 2 different diets regarding the forage/concentrates ratio (35/65 and 65/35, on a DM basis), containing or not 5% FFS (full fat soya treated with formaldehyde 12.5%). Including FFS in diet and the ratios rich in concentrates determined a significant improvement in weight gain (P<0.01), in the degree of food recovery and in fatty acid profile from the carcass. It has been significantly increased (P<0.01) the weight of polyunsaturated fatty acids (PUFA) from intramuscular fat (longissimus dorsi-LD and femoral biceps-FB) and the deposit fat (subcutaneous-SC and perirenal-PR) and decreased the proportion of saturated (SFA) and monounsaturated fatty acids (MUFA). Most significant differences were recorded about PUFA from Omega-3 series (C18: 3 n-3, EPA C22: 3 n-3, DPA and DHA) and CLA isomers (conjugated linolenic acid: C 18:2 C9, t11+C 18:2 t10, C12). The best profile of fatty acids, considered in light of the influence on human health (high concentration of Omega 3 fatty acids and CLA and low in SFA) was established in LD, for lambs fed with diets high in concentrates and which contained FFS (HC/S).

Cuvinte cheie: Forage/concentrate ratio, full fat soya by-pass, PUFA Omega 3 and CLA, lambs. // Forage/concentrate ratio, full fat soya by-pass, PUFA Omega 3 and CLA, lambs.