Stanko R T, Ferguson T L, Newman C W, Newman R K
Dept. of Med., Montefiore Hospital, Univ. of Pittsburgh, PA 15213.
J Anim Sci. 1989 May;67(5):1272-8. doi: 10.2527/jas1989.6751272x.
Swine weighing 80 to 85 kg were fed a basal corn-soybean meal diet plus a mixture of dihydroxyacetone and pyruvate (3:1) (triose) or Polycose (control), a glucose polymer, as 3.85% of calories (4% of the diet). Twenty-four pigs were pair-fed the triose mixture or control diet for 28 d in litter-mate pairs of the same sex. Weight gain and feed consumption were recorded and carcasses were evaluated for fat and muscle accretion. The right rear leg and rear one-third of the right loin were skinned, deboned, ground and analyzed for protein, fat, moisture and ash content. Average backfat depth and backfat depth at the first, last and 10th rib were reduced by 12, 15, 14 and 12% (P less than .01), respectively, in triose-fed pigs. Loin eye area and untrimmed lean cuts were not altered by diet, but percentage trimmed lean cuts was higher (P less than .02) in triose-fed pigs (57.6 vs 55.3%). Leg and loin tissue samples from pigs fed the triose mixture had a lower (P less than .01) percentage of fat and a corresponding increased (P less than .01) percentage of protein. Organ weights and the blood biochemical profile were not altered by triose feeding. Liver function tests were not altered in animals consuming the trioses, except for an 18% decrease (P less than .05) in serum glutamic pyruvic transaminase. Ingestion of dihydroxyacetone and pyruvate will reduce body fat in limit-fed swine without reducing muscle protein deposition.
给体重80至85千克的猪喂食基础玉米 - 豆粕日粮，再添加二羟基丙酮和丙酮酸的混合物（比例为3:1）（丙糖）或葡萄糖聚合物Polycose（对照），添加量为热量的3.85%（占日粮的4%）。24头猪按同性别同窝配对，分别喂食丙糖混合物或对照日粮28天。记录体重增加量和采食量，并评估胴体的脂肪和肌肉沉积情况。将右后腿和右腰部后三分之一处的皮肤、骨头去除，绞碎后分析其蛋白质、脂肪、水分和灰分含量。喂食丙糖的猪，平均背膘厚度以及第一、最后和第十肋骨处的背膘厚度分别降低了12%、15%、14%和12%（P小于0.01）。日粮对眼肌面积和未修剪瘦肉切块无影响，但喂食丙糖的猪修剪后瘦肉切块的百分比更高（P小于0.02）（分别为57.6%和55.3%）。喂食丙糖混合物的猪的腿部和腰部组织样本脂肪百分比更低（P小于0.01），相应地蛋白质百分比增加（P小于0.01）。喂食丙糖对器官重量和血液生化指标无影响。除血清谷丙转氨酶降低18%（P小于0.05）外，食用丙糖的动物肝功能测试无变化。摄入二羟基丙酮和丙酮酸可减少限饲猪的体脂，而不减少肌肉蛋白质沉积。
