Lammers P J, Kerr B J, Weber T E, Dozier W A, Kidd M T, Bregendahl K, Honeyman M S
Department of Animal Science, Iowa State University, USA.
J Anim Sci. 2008 Mar;86(3):602-8. doi: 10.2527/jas.2007-0453. Epub 2007 Dec 11.
The apparent DE and ME values of crude glycerol for growing pigs were determined in 5 experiments using crude glycerol (86.95% glycerol) from a biodiesel production facility, which used soybean oil as the initial feedstock. Dietary treatments were 0, 5, or 10% glycerol addition to basal diets in Exp. 1; 0, 5, 10, or 20% glycerol addition to basal diets in Exp. 2; and 0 and 10% crude glycerol addition to the basal diets in Exp. 3, 4, and 5. Each diet was fed twice daily to pigs in individual metabolism crates. After a 10-d adjustment period, a 5-d balance trial was conducted. During the collection period, feces and urine were collected separately after each meal and stored at 0 degrees C until analyses. The GE of each dietary treatment and samples of urine and feces from each pig were determined by isoperibol bomb calorimetry. Digestible energy of the diet was calculated by subtracting fecal energy from the GE in the feed, whereas ME was calculated by subtracting the urinary energy from DE. The DE and ME values of crude glycerol were estimated as the slope of the linear relationship between either DE or ME intake from the experimental diet and feed intake. Among all experiments, the crude glycerol (86.95% glycerol) examined in this study was shown to have a DE of 3,344 +/- 8 kcal/kg and an ME of 3,207 +/- 10 kcal/kg, thereby providing a highly available energy source for growing pigs.
在5项试验中测定了生长猪对粗甘油的表观消化能（DE）和代谢能（ME）值，试验所用粗甘油（甘油含量86.95%）来自以大豆油为初始原料的生物柴油生产设施。在试验1中，日粮处理为在基础日粮中添加0%、5%或10%的甘油；试验2中，在基础日粮中添加0%、5%、10%或20%的甘油；试验3、4和5中，在基础日粮中添加0%和10%的粗甘油。每种日粮每天分两次喂给单笼饲养的猪。经过10天的适应期后，进行为期5天的平衡试验。在收集期内，每餐之后分别收集粪便和尿液，并在0℃下储存直至分析。每种日粮处理以及每头猪的尿液和粪便样本的总能（GE）通过等温式氧弹量热法测定。日粮的消化能通过从饲料的总能中减去粪便能来计算，而代谢能则通过从消化能中减去尿能来计算。粗甘油的消化能和代谢能值通过实验日粮的消化能或代谢能摄入量与采食量之间线性关系的斜率来估算。在所有试验中，本研究检测的粗甘油（甘油含量86.95%）的消化能为3344±8千卡/千克，代谢能为3207±10千卡/千克，因此为生长猪提供了一种高利用率的能量来源。
