Crude glycerin has a potential for use as a nutritional additive and/or substitute for some feed components. Although proven in some animal species, there are no reports of its use in horses. The aim of this study was to determine the effect of adding different levels of crude glycerin on the digestibility and palatability of nutrients in the equine diet. Eight pony geldings were used in this study, aged 9 years, weighing 149.80 ± 17.20 kg and body condition score 5.4 ± 0.7. A contemporary Latin square 4 × 4 double experimental design was used. Diets differed in the level of inclusion of glycerin (0, 4, 8 and 12%) over the concentrate. To verify the effect of adding crude glycerin to the diet, the total apparent digestibility of nutrients in the diet was assessed. Data were analyzed using the Statistical Analysis System (SAS Institute Inc., 2010). For statistical significance, Tukey test was used with P < 0.05. Digestibility analyses showed that glycerin addition, even at different levels in the diet, did not affect the feed intake nor the apparent variables of digestibility and fermentation of the total tract (P > 0.05). Additionally, no differences were found between treatments for glucose and insulin values (P > 0.05). In this study the addition of glycerin, even at the amount of 12%, did not affect the acceptability and digestibility of nutrients in the diet. These results are encouraging, yet more research is needed to clarify the appropriate levels of inclusion and/or substitution using this product.

粗甘油有潜力用作营养添加剂和/或替代某些饲料成分。尽管已在某些动物物种中得到证实，但尚无有关其在马中使用的报道。这项研究的目的是确定添加不同水平的粗甘油对马饮食中营养物质的消化率和适口性的影响。本研究使用了8种小马gel插，年龄9岁，体重149.80±17.20公斤，身体状况评分5.4±0.7。使用了当代拉丁方格4×4双重实验设计。日粮中甘油的含量高于浓缩物（0％，4％，8％和12％）。为了验证在饮食中添加粗甘油的效果，评估了饮食中营养物质的总表观消化率。使用统计分析系统（SAS Institute Inc.，2010）分析数据。P＜0.05。消化率分析表明，即使在日粮中添加不同水平的甘油，也不会影响饲料的摄入量，也不会影响总消化率和发酵的表观变量（P > 0.05）。此外，在葡萄糖和胰岛素值的治疗之间未发现差异（P > 0.05）。在这项研究中，即使添加12％的甘油，也不会影响饮食中营养素的可接受性和消化率。这些结果令人鼓舞，但是需要更多的研究来阐明使用该产品的适当包容和/或取代水平。