Carvalho V B, Leite R F, Almeida M T C, Paschoaloto J R, Carvalho E B, Lanna D P D, Perez H L, Van Cleef E H C B, Homem Junior A C, Ezequiel J M B
Animal Science Department at Universidade Estadual Paulista Julio de Mesquita Filho (Unesp), Campus Jaboticabal, CEP: 14884-900, Jaboticabal, SP, Brazil.
Animal Science Department at Universidade Estadual Paulista Julio de Mesquita Filho (Unesp), Campus Jaboticabal, CEP: 14884-900, Jaboticabal, SP, Brazil.
Meat Sci. 2015 Dec;110:285-92. doi: 10.1016/j.meatsci.2015.08.001. Epub 2015 Aug 5.
In this study, we evaluated the effects of total corn replacement with crude glycerin on carcass characteristics and meat quality of feedlot lambs fed high-concentrate diets with low starch. Forty non-castrated Santa Ines lambs (23.5 ± 3.56 kg BW) were assigned to a randomized complete block design with five dietary treatments: 0%, 7.5%, 15%, 22.5%, or 30% crude glycerin, replacing corn. Animals were slaughtered at a BW of 38 kg after 72 ± 20 days. The addition of up to 30% crude glycerin reduced carcass weight and yield (P ≤ 0.02). Odd-chain fatty acids, oleic, palmitoleic, total unsaturated, and monounsaturated fatty acids were increased (P ≤ 0.01) while CLA tended to increase in glycerin-fed lambs (P = 0.06). Crude glycerin decreased stearic, palmitic, transvaccenic, total saturated fatty acids, and atherogenicity index (P < 0.01). High concentrations of crude glycerin in low-starch diets reduced carcass weights, nevertheless improved meat quality by increasing unsaturated and odd-chain fatty acid contents.
在本研究中，我们评估了用粗甘油完全替代玉米对饲喂低淀粉高浓度日粮的育肥羔羊胴体特性和肉质的影响。将40只未去势的圣伊内斯羔羊（体重23.5±3.56千克）分配到随机完全区组设计中，采用五种日粮处理：0%、7.5%、15%、22.5%或30%的粗甘油替代玉米。72±20天后，动物体重达到38千克时进行屠宰。添加高达30%的粗甘油会降低胴体重量和产量（P≤0.02）。奇数链脂肪酸、油酸、棕榈油酸、总不饱和脂肪酸和单不饱和脂肪酸含量增加（P≤0.01），而共轭亚油酸在饲喂甘油的羔羊中呈增加趋势（P = 0.06）。粗甘油降低了硬脂酸、棕榈酸、反式vaccenic酸、总饱和脂肪酸和动脉粥样硬化指数（P < 0.01）。低淀粉日粮中高浓度的粗甘油降低了胴体重量，但通过增加不饱和脂肪酸和奇数链脂肪酸含量改善了肉质。
