三丁酸甘油酯对肉鸡生长性能、养分表观消化率、屠宰性能、肠道形态及微生物菌群的影响

摘要

This experiment was conducted to investigate the effects of tributyrin on growth performance, nutri-ent apparent digestibility, slaughter performance, intestinal morphology and microbial flora of broilers.A total of 1 800 one-day-old male Avian broilers were selected and randomly divided into 6 groups with 6 replicates per group and 50 broilers per replicate.Broilers in the control group was fed a basal diet, and broilers in the experimental groups were fed the basal diets supplemented with 0 .10%, 0 .15%, 0 .20%, 0 .30% and 0 .40% tributyrin, respectively.The experiment lasted for 42 days.The results showed as follows:diets sup-plemented with tributyrin tended to improve the growth performance of broilers, and the 0 .20% tributyrin group reached the highest.2 ) Compare with the control group, the apparent digestibility of ether extract and crude fiber in 0.20%tributyrin group was significantly increased ( P<0.05); the slaughter performance ten-ded to be improved, but had no significant change ( P>0 .05 ); the villus height in duodenum and jejunum was significantly increased (P<0.05);the crypt depth in duodenum and jejunum tended to be decreased, but had no significant change (P>0.05);the number of Lactobacillus in cecum was significantly increased (P<0.05), and the number of Escherichia coli in cecum was significantly decreased (P<0.05).In conclusion, diets supplemented with tributyrin can promote the growth performance, increase the nutrient digestibility and improve intestinal morphology and microbial flora of broilers.The optimal supplemented level of tributyrin is 0.20% for broilers.%本试验旨在研究三丁酸甘油酯对肉鸡生长性能、养分表观消化率、屠宰性能、肠道形态及微生物菌群的影响。选用1日龄艾维茵肉公鸡1800羽，随机分为6组，每组6个重复，每个重复50羽。对照组饲喂基础饲粮，试验组分别饲喂在基础饲粮中添加0．10％、0．15％、0．20％、0．30％、0．40％三丁酸甘油酯的试验饲粮。试验期42 d。结果表明：1）饲粮中添加三丁酸甘油酯有促进肉鸡生长的趋势，其中0．20％三丁酸甘油酯组效果最佳。2）与对照组相比，0．20％三丁酸甘油酯组的粗脂肪和粗纤维表观消化率均显著提高（P＜0．05）；肉鸡屠宰性能有改善的趋势，但差异不显著（P＞0．05）；十二指肠和空肠肠绒毛高度均显著提高（P＜0．05），隐窝深度有变浅的趋势，但差异不显著（P＞0．05）；盲肠乳酸菌数量显著增加（P＜0．05），大肠杆菌数量显著减少（P＜0．05）。由此可见，饲粮添加三丁酸甘油酯能促进生长性能，提高饲料养分消化率，改善肠道形态和微生物菌群，肉鸡饲粮中三丁酸甘油酯适宜添加量为0．20％。