不同组合益生菌对育成期水貂生长性能和消化代谢规律的影响

Effects of Different Combination of Probiotics on Growth Performance,Digestion Metabolism Rules of Growing Minks

本试验旨在研究不同组合益生菌对育成期水貂生长性能和营养物质消化率及氮平衡的影响。选择96只60日龄、健康状况良好的水貂,随机分为4组,每组24只,公、母各半。对照组饲喂基础日粮,试验1、2、3组分别在基础日粮中添加0.06g地衣芽孢杆菌+0.06g枯草芽孢杆菌、6g安琪酵母+12mL乳酸菌、0.06g地衣芽孢杆菌+0.06g枯草芽孢杆菌+6g安琪酵母+12mL乳酸菌。在水貂育成期内进行饲养与消化代谢试验,分析不同组合益生菌对水貂平均日采食量、平均日增重、料重比、粗蛋白质和粗脂肪的消化率及沉积氮、蛋白质生物学价值和净蛋白质利用率的影响。结果表明,与对照组相比,试验1组公貂的干物质消化率和试验2组公貂的脂肪消化率显著下降(P<0.05),但不同组水貂的生长性能和氮平衡及母貂的营养物质消化率未受到益生菌的影响(P>0.05)。提示,日粮中添加益生菌不会显著改善育成期水貂的生长性能、营养物质消化率及氮平衡,故在水貂健康的前提下,无需在育成貂日粮中添加益生菌。

This experiment was conducted to study the effects of probiotics on growth performance, nutrient digestibility and nitrogen balance of growing minks. Ninety six healthy minks at the age of 60-day-old were randomly divided into 4 groups with 24 replicates （12 males and 12 females） in each group. The control group of minks was offered a basal diet, the group 1 to 3 were fed with a basal diet supplemented with 0.06 g Bacillus licheniforrnis and 0.06 g Bacillus subtilis, 12 mL Lactoba- cillus and 6 g yeast, and 0.06 g Bacillus licheniformis, O. 06 g Bacillus subtilis, 12 mL Lactobacillus and 6 g yeast, respec- tively. The trials of feeding and metabolism were used to analyze the average daily feed intake, average daily gain, feed to gain ratio （F/G）, digestibility of crude protein, digestibility of crude fat, nitrogen deposition, net protein utilization and protein bio- logical value. The results showed that compared with the control group, dry matter digestibility of group 1 and crude fat di- gestibility of group 2 decreased significantly （P〈0.05）, but the growth performance and nitrogen balance of minks, as well as nutrient digestibility of female minks had no significant difference （P〈0.05）. In conclusion, supplementation of probiotics in diet could not significantly improve growth performance, nutrient digestibility and nitrogen balance of growing minks. There was no need to add probiotics in production of healthy growing minks.