Olivares A, Daza A, Rey A I, López-Bote C J
Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense, 28040 Madrid, Spain.
Meat Sci. 2009 Feb;81(2):295-9. doi: 10.1016/j.meatsci.2008.07.029. Epub 2008 Aug 7.
This experiment was conducted to study the effect of vitamin A concentration in the diet on fatty acid composition in pigs. One-hundred and twenty eight Duroc × (Large White × Landrace) castrated male pigs were used. Pigs were randomly distributed and located in cages of four pigs each to the following treatment: vitamin A-enriched diet (100,000IU/kg) (n=16) and control diet with a basal level (7500IU/kg) (n=16). The pigs were slaughtered at an average weight of 125.9kg. No effect of diet vitamin A level on performance, carcass traits and intramuscular fat percentage was observed. The retinol concentration in subcutaneous backfat and retinol and retinol palmitate contents in liver were higher in the pigs that were given the vitamin A enriched diet than in those receiving the control diet. However the vitamin A supplementation did not increase the retinol content in the muscle. Pigs receiving the vitamin A enriched diet showed a higher C16:0 and ∑SFA proportions in the outer layer and C18:0 and ∑SFA proportions in the inner layer. Moreover, the diet rich in vitamin A led to a reduction of C18:1 n-9 and ∑MUFA proportions in subcutaneous backfat inner layer. Dietary vitamin A concentration had not influence on main fatty acids composition of intramuscular lipids. Dietary vitamin A enrichment lead to a higher C16:0, ∑SFA concentration in liver lipids.
本试验旨在研究日粮中维生素A浓度对猪脂肪酸组成的影响。选用128头杜洛克×（大白×长白）阉割公猪。将猪随机分组，每组4头，分别饲喂以下日粮：高维生素A日粮（100,000IU/kg）（n = 16）和基础水平（7500IU/kg）的对照日粮（n = 16）。猪平均体重达125.9kg时屠宰。未观察到日粮维生素A水平对生产性能、胴体性状和肌内脂肪百分比有影响。饲喂高维生素A日粮的猪，其背部皮下脂肪中的视黄醇浓度以及肝脏中的视黄醇和视黄醇棕榈酸酯含量均高于饲喂对照日粮的猪。然而，补充维生素A并未增加肌肉中的视黄醇含量。饲喂高维生素A日粮的猪，外层的C16:0和∑SFA比例以及内层的C18:0和∑SFA比例较高。此外，富含维生素A的日粮导致皮下背部脂肪内层的C18:1 n-9和∑MUFA比例降低。日粮维生素A浓度对肌内脂质的主要脂肪酸组成没有影响。日粮中添加维生素A会使肝脏脂质中的C16:0、∑SFA浓度升高。
