Corino C, Oriani G, Pantaleo L, Pastorelli G, Salvatori G
Istituto di Alimentazione Animale, Facoltà di Medicina Veterinaria, Milano, Italy.
J Anim Sci. 1999 Jul;77(7):1755-61. doi: 10.2527/1999.7771755x.
Crossbred "heavy" pigs (average weight 120 kg, slaughter weight above 160 kg) were supplemented with all-rac-alpha-tocopheryl acetate during the last 60 d of late finishing at doses of 25 (control), 50, 100, 200, or 300 mg/kg of diet. At the end of this period, the pigs were slaughtered. Carcass characteristics and the meat quality of pork chops from longissimus muscle (LM) at the last lumbar vertebra were evaluated on eight barrows from each dosage group. Alpha-tocopherol levels were determined in plasma during supplementation and in LM muscle after slaughter. Thiobarbituric acid reactive substances (TBARS) and drip loss were also evaluated in meat. Plasma alpha-tocopherol levels increased (P < .005) during supplementation in treated animals compared to controls, with a peak at 40 d. Alpha-tocopherol levels were higher (P < .05) in LM from pigs treated with 300 mg/kg than in controls (8.4 vs 5.6 microg/g). Dressing percentages correlated (P < .05) with the ratio of plasma alpha-tocopherol levels to the sum of cholesterol and triglycerides. Inhibition of TBARS during storage was related (P < .005) to vitamin E supplementation level, but drip losses in chops were not related to supplementation levels. We concluded that dietary vitamin E supplementation to heavy pigs during the last 60 d of finishing improves dressing percentage, reduces lipid oxidation, and increases the alpha-tocopherol concentration of tissues.
杂交“重型”猪（平均体重120千克，屠宰体重超过160千克）在育肥后期的最后60天，以25（对照）、50、100、200或300毫克/千克日粮的剂量补充全反式α-生育酚乙酸酯。在此阶段结束时，将猪屠宰。对每个剂量组的八头公猪评估最后腰椎处背最长肌（LM）的胴体特征和猪排肉质。在补充期间测定血浆中的α-生育酚水平，并在屠宰后测定LM肌肉中的α-生育酚水平。还评估了肉中的硫代巴比妥酸反应物质（TBARS）和滴水损失。与对照组相比，处理组动物在补充期间血浆α-生育酚水平升高（P <.005），在40天时达到峰值。用300毫克/千克处理的猪的LM中α-生育酚水平高于对照组（P <.05）（8.4对5.6微克/克）。屠宰率与血浆α-生育酚水平与胆固醇和甘油三酯总和的比值相关（P <.05）。储存期间TBARS的抑制与维生素E补充水平相关（P <.005），但猪排中的滴水损失与补充水平无关。我们得出结论，在育肥的最后60天对重型猪补充日粮维生素E可提高屠宰率，减少脂质氧化，并增加组织中的α-生育酚浓度。
