本试验旨在研究饲粮白酒糟添加水平对山羊生产性能、营养物质表观消化率及血清生化指标的影响，以确定山羊饲粮中白酒糟的最佳添加水平。选取48只4月龄、平均体重为（17.77±4.20） kg的山羊，随机分为4组，每组12只（公母各占1/2）。各组山羊分别饲喂白酒糟添加水平为0（对照组）、10%、20%、30%的试验饲粮，试验期为57 d，饲喂量为1 kg/（只·d）。结果表明：10%添加组山羊的平均净增重、平均日增重、屠宰率、净肉率最高，料重比最低，经济效益最佳，且其屠宰率和净肉率均显著高于对照组（P<0.05）。10%添加组山羊的干物质、代谢能、粗蛋白质、中性洗涤纤维、磷的表观消化率均为最高，且其干物质和代谢能表观消化率均显著高于30%添加组（P<0.05）。30%添加组山羊的平均净增重、平均日增重、料重比和各营养物质表观消化率与对照组差异均不显著（P>0.05）。此外，血清总蛋白含量各组间差异不显著（P>0.05），但30%添加组的血清尿素氮含量显著高于对照组和10%添加组（P<0.05）。由此得出，饲粮白酒糟添加水平在30%以内时对山羊生产性能和各营养物质表观消化率无不利影响。综合考虑，山羊饲粮中添加10%白酒糟效果最佳。

This experiment was conducted to investigate the effects of white distillers' grains supplemental level on performance, nutrient apparent digestibility and serum biochemical indices of goats in order to determine the optimal supplemental level of white distillers' grains in diets for goats. Forty eight four-month-old goats with an average body weight of (17.77±4.20) kg were randomly assigned to 4 groups, and each group had 12 goats (half male and half female). The goats in the 4 groups were fed the experimental diets containing 0 (control group), 10%, 20% and 30% of white distillers' grains, respectively. The experiment lasted for 57 days, and the amount of feeding was restricted to 1.0 kg/(goat·d). The results showed as follows: the 10% supplemental group had the highest average net gain, average daily gain, dressing percentage and pure meat percentage, the best economic benefit and the lowest feed/gain, and the dressing percentage and pure meat percentage in 10% supplemental group were significantly higher than those in control group (P<0.05). The 10% supplemental group had the highest apparent digestibility of dry matter, metabolizable energy, crude protein, neutral detergent fiber, phosphorus, and the apparent digestibility of dry matter and metabolizable energy in 10% supplemental group were significantly higher than those in 30% supplemental group (P<0.05). No significant differences were found in average net gain, average daily gain, feed/gain and nutrient apparent digestibility among 30% supplemental group and control group (P>0.05). In addition, there was no significant difference in serum total protein content among all groups (P>0.05), but the serum urea nitrogen content in 30% supplemental group was significantly higher than that in control group and 10% supplemental group (P<0.05). It is concluded that the supplemental levels of white distillers' grains in diets less than 30% have no adverse effects on performance and nutrient apparent digestibility of goats. Overall consideration, the diet supplemented with 10% white distillers' grains has the best effect for goats.