Oliveira Maria A, Alves Susana P, Santos-Silva José, Bessa Rui J B
Faculdade de Medicina Veterinária, ULisboa, 1300-477 Lisboa, Portugal; Escola Superior Agrária de Coimbra, Instituto Politécnico de Coimbra, 3045-601 Coimbra, Portugal.
Faculdade de Medicina Veterinária, ULisboa, 1300-477 Lisboa, Portugal; CIISA, Centro de Investigação Interdisciplinar em Sanidade Animal, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.
Meat Sci. 2017 Jan;123:166-172. doi: 10.1016/j.meatsci.2016.10.001. Epub 2016 Oct 5.
Forty lambs were fed one of four diets supplemented with a linseed and sunflower oil blend but differing in starch level (mid, ≈35 vs. high, ≈50%) and starch rumen degradability (mid, ≈70 vs. high, ≈80%). The effects of diet on growth, carcass traits and meat fatty acid (FA) composition, with emphasis on biohydrogenation intermediates were evaluated. Lambs stayed on trial for 5weeks until slaughter. Treatment had no effect on animal performance and carcass traits. High-degradability diets decreased (P=0.04) meat shear force compared with mid-degradability diets. Lipid content of meat was unaffected by the diet. Mid-starch diets increased (P<0.05) the saturated FA and cis-MUFA but decreased (P<0.05) the trans-MUFA, particularly the t10-18:1, when compared with high-starch diets. The t11-18:1 (0.7% of total FA) and c9,t11-18:2 (<0.3%) remained low and the 18:3n-3 remained high (1.74%) and unaffected by diet.
四十只羔羊被喂食四种日粮中的一种，这些日粮均添加了亚麻籽和向日葵油混合物，但淀粉水平不同（中等，约35%对高，约50%）以及淀粉瘤胃降解率不同（中等，约70%对高，约80%）。评估了日粮对生长、胴体性状和肉脂肪酸（FA）组成的影响，重点是生物氢化中间产物。羔羊持续试验5周直至屠宰。处理对动物性能和胴体性状没有影响。与中等降解率日粮相比，高降解率日粮降低了（P = 0.04）肉的剪切力。肉的脂质含量不受日粮影响。与高淀粉日粮相比，中等淀粉日粮增加了（P<0.05）饱和脂肪酸和顺式单不饱和脂肪酸，但降低了（P<0.05）反式单不饱和脂肪酸，尤其是t10-18:1。t11-18:1（占总脂肪酸的0.7%）和c9,t11-18:2（<0.3%）仍然较低，18:3n-3仍然较高（1.74%）且不受日粮影响。
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