Department of Animal Sciences, University of Illinois, Urbana 61801, USA.
J Anim Sci. 2010 Dec;88(12):3887-95. doi: 10.2527/jas.2010-2873. Epub 2010 Jul 30.
Two studies were conducted with refined glycerin (97.7 and 97.5% glycerin for studies I and II, respectively) to determine ME content and effects on growth performance and carcass and pork quality measures of finishing pigs. An energy balance study using 24 barrows (21.5 ± 0.6 kg initial BW) determined the apparent ME content of glycerin using a generalized randomized block design with 2 dietary treatments: 1) control (99.85% corn + vitamins and minerals) and 2) glycerin (30% of corn in the control diet replaced with glycerin). A 7-d adaptation was followed by a 5-d collection period for feces and urine. The energy content of diets, feces, and urine was determined by bomb calorimetry. The DE of the glycerin diet was greater (P < 0.01) than that of the control diet (4,298 vs. 3,902 kcal/kg of DM); however, the ME content of the 2 diets was similar (3,820 vs. 3,723 kcal/kg of DM). The ME of refined glycerin (estimated by difference) was 3,584 kcal/kg of DM. A growth study was conducted with 128 gilts housed in groups of 4 and reared from 92.5 ± 0.24 kg of BW for a 28-d period, using a split-plot design with a 4 × 2 factorial arrangement of treatments: 1) dietary glycerin level (0, 5, 10, and 15%) and 2) preslaughter handling (gentle vs. intense). The handling treatment was included to simulate the range in handling intensities that are likely to be experienced in practice. At the end of the 28-d period, one-half of the pens on study were slaughtered and used for carcass and pork quality evaluation with 2 pigs from each pen being subjected to each of the preslaughter handling treatments. There were no interactions (P > 0.05) between dietary glycerin and preslaughter handling treatment. Dietary glycerin had no effect (P > 0.05) on growth performance, carcass measures, or meat quality. There were no differences (P > 0.05) between the gentle and intense handling treatments for carcass or pork quality measures. In conclusion, feeding glycerin to finishing pigs at up to 15% of the diet had no negative effect on growth performance or carcass and pork quality characteristics.
进行了两项研究，使用精制甘油（研究 I 和 II 中分别为 97.7%和 97.5%的甘油）来确定 ME 含量以及对生长性能和胴体及猪肉质量的影响。一项能量平衡研究使用了 24 头阉公猪（初始 BW 为 21.5 ± 0.6kg），采用 2 种饮食处理的广义随机分组设计确定了甘油的表观 ME 含量：1）对照（99.85%玉米+维生素和矿物质）和 2）甘油（对照饮食中 30%的玉米用甘油代替）。适应期为 7 天，然后进行 5 天的粪便和尿液收集期。通过弹式量热计测定日粮、粪便和尿液的能量含量。甘油饮食的 DE（消化能）高于对照饮食（4298 比 3902kcal/kg DM）（P<0.01）；然而，两种饮食的 ME 含量相似（3820 比 3723kcal/kg DM）。精制甘油的 ME（通过差值估计）为 3584kcal/kg DM。一项生长研究使用 128 头母猪，每组 4 头，从 92.5 ± 0.24kg BW 饲养 28 天，采用 4×2 因子处理的裂区设计：1）日粮甘油水平（0、5、10 和 15%）和 2）宰前处理（温和与剧烈）。包括处理强度是为了模拟在实践中可能经历的处理强度范围。28 天结束时，一半的研究猪舍被屠宰，用于胴体和猪肉质量评估，每栏 2 头猪接受每种宰前处理。日粮甘油和宰前处理之间没有相互作用（P>0.05）。日粮甘油对生长性能、胴体指标或肉质没有影响（P>0.05）。温和和剧烈处理对胴体或猪肉质量指标没有差异（P>0.05）。总之，在育肥猪日粮中添加高达 15%的甘油对生长性能或胴体和猪肉质量特性没有负面影响。
