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 produc...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, tl I＋C 18：2 t10, C 12）. 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）.展开更多
In order to evaluate the effect of crossbreeding on growth performance and carcass traits, Afshari and Fashandi rams crossed with Zandi ewes. 45 Afshari x Zandi and 30 Fashandi x Zandi lambs recorded in a period of 10...In order to evaluate the effect of crossbreeding on growth performance and carcass traits, Afshari and Fashandi rams crossed with Zandi ewes. 45 Afshari x Zandi and 30 Fashandi x Zandi lambs recorded in a period of 100 days feedlot. Daily weight gain and dry matter intake significantly affected by crossbreeding which were the highest in Afshari x Zandi group （0.180 ± 0.004 and 1.415 ±0.025, respectively）, but it had no effect on feed conversion ratio. The genetic group affected final feedlot weight, empty body weight, warm carcass weight and carcass efficiency which Afshari ± Zandi group had higher amounts （44.70 ± 1.25 kg, 38.85 1.05 kg, 22.63 ± 0.95 kg and 58.63 ±0.77%, respectively）. The breed of ram lambs had no significant effect on the percentage of thigh, loin, shoulder＇, brisket, fat tail, tallow and total removal fat; however the percentage of thigh was different between two crossbred groups. Lean and fat percentage was higher in Fashandi x Zandi crosses.展开更多
文摘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, tl I＋C 18：2 t10, C 12）. 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）.
文摘In order to evaluate the effect of crossbreeding on growth performance and carcass traits, Afshari and Fashandi rams crossed with Zandi ewes. 45 Afshari x Zandi and 30 Fashandi x Zandi lambs recorded in a period of 100 days feedlot. Daily weight gain and dry matter intake significantly affected by crossbreeding which were the highest in Afshari x Zandi group （0.180 ± 0.004 and 1.415 ±0.025, respectively）, but it had no effect on feed conversion ratio. The genetic group affected final feedlot weight, empty body weight, warm carcass weight and carcass efficiency which Afshari ± Zandi group had higher amounts （44.70 ± 1.25 kg, 38.85 1.05 kg, 22.63 ± 0.95 kg and 58.63 ±0.77%, respectively）. The breed of ram lambs had no significant effect on the percentage of thigh, loin, shoulder＇, brisket, fat tail, tallow and total removal fat; however the percentage of thigh was different between two crossbred groups. Lean and fat percentage was higher in Fashandi x Zandi crosses.
