本文旨在比较不同剂型乳酸菌对雏鸡生长性能和小肠黏膜组织形态的影响。试验选用1日龄健康肉雏鸡240只，随机分成4组，每组5个重复，每个重复12只鸡。Ⅰ组为固体制剂组，饲喂基础饲粮+0.2%草乳杆菌固体制剂；Ⅱ组为液体制剂组，饲喂基础饲粮+0.2%草乳杆菌液体制剂；Ⅲ组为抗生素组，饲喂基础饲粮+0.01%黄霉素；Ⅳ组为对照组，饲喂基础饲粮，试验期为14 d。结果表明：乳酸菌液体制剂组1~14日龄雏鸡的平均日增重显著高于抗生素组和乳酸菌固体制剂组（P<0.05），在料重比方面各组并无显著差异（P>0.05），但液体制剂的效果要优于固体制剂；乳酸菌制剂有增加小肠绒毛高度和减小隐窝深度的趋势，但仅乳酸菌液体制剂组达到显著水平（P＜0.05）；各乳酸菌制剂对小肠肠壁厚度影响不显著（P>0.05）；乳酸菌液体制剂组雏鸡小肠绒毛高度与隐窝深度的比值显著大于对照组和抗生素组（P＜0.05），但是乳酸菌固体制剂组雏鸡小肠绒毛高度与隐窝深度的比值与抗生素组和对照组相比均无显著差异（P>0.05）。结果提示，不同剂型乳酸菌可以提高雏鸡的平均日增重，并且对小肠肠道黏膜的组织形态有一定的改善，可以增加小肠绒毛高度，减少隐窝深度，但液体制剂效果优于固体制剂。

The experiment was conducted to study the effects of different Lactobacillus forms on growth performance and small intestinal mucosa morphology of broiler chickens. A total of 240 one-day-old chickens were randomly assigned to 4 groups with 5 replicates per group and 12 chickens per replicate. Group Ⅰ was Lactobacillus solid preparation group (basal diet+0.2% L. graminis solid preparation); group Ⅱ was Lactobacillus liquid preparation group (basal diet+L. graminis liquid preparation); group Ⅲ was antibiotic group (basal diet+0.01% flavomycin); group Ⅳ was control group (basal diet). The experimental period was 14 days. The results showed as follows: compared with the antibiotic group and Lactobacillus solid preparation group, the average daily gain of broilers aged from 1 to 14 days in the Lactobacillus liquid preparation group was significantly increased (P<0.05); there was no significant difference in the ratio of feed to gain among all groups (P>0.05); the effect of liquid preparation was better than that of solid preparation. Lactobacillus preparation could increase the height of intestinal villus and decrease the depth of crypt to a certain extent, but only Lactobacillus liquid preparation had a significant effect (P＜0.05). No significant difference was observed in the thickness of intestinal wall in different Lactobacillus preparation groups (P>0.05); the intestinal villus height/crypt depth of broilers in liquid Lactobacillus preparation group was significantly higher than that in the control group and antibiotic group (P＜0.05), but there was no significant difference between the solid Lactobacillus preparation group, control group and antibiotic group (P>0.05). In conclusion, the supplementation of Lactobacillus preparation in the diet can increase the average daily gain, and improve small intestinal mucosa morphology of broiler chickens to a certain extent, such as an increase in the height of intestinal villus and a decrease in the depth of crypt. Furthermore, the effect of liquid preparation is better than that of solid preparation.［Chinese Journal of Animal Nutrition, 2011, 23（10）：1812 -1818］