益生素对银香雏鸡生长性能及肠道微生物菌群的影响

Effects of Probiotics on Performance and Intestinal Microbial Frola of Yinxiang Chickens

选用1日龄银香肉仔鸡1000只,随机分成2组,每组500只,设2个重复,分别在基础日粮中添加0和0.1%的益生素,研究益生素对0-7周龄银香雏鸡生产性能和健康状况的影响。共饲养7周,每周统计耗料量、腹泻率、抽样测体重,并对49日龄雏鸡取样测定肠道微生物浓度。结果表明,试验组各周平均体重分别比对照组增加3.40%,3.52%,10.04%,9.08%,8.53%,11.65%,其中第3周、第4周、第5周和第6周差异极显著（P〈0.01）,第1周和第2周差异不显著（P〉0.05）。从各周的增重率来看,第1周、第3周和第6周分别比对照组高19.31%、17.15%和21.56%（P〈0.01）;第4周比对照组高7.08%（P〈0.05）;第2周和第5周也高于对照组（P〉0.05）。全期益生素组平均增重比对照组高12.81%（P〈0.01）。试验组腹泻死亡总数及腹泻死亡率均低于对照组,且差异显著（P〈0.05）。试验组空肠和盲肠的大肠杆菌浓度分别比对照组低26.16%和27.90%（P〈0.05）,沙门氏菌在两组中都很少,试验组空盲肠的乳酸菌浓度分别比对照组高20.96%和13.52%（P〈0.05）。

The effects of probiotics on performance and health of Yinxiang chickens were studied in the Grststage.1000 1day-old chickens were allotted randomly to two treatments,500 chickens of each,with two replicates.The treatment encompassed of 0.1% probiotics in the basic diet and 0% probiotics in the diet as control.The probiotics used in the experiment consists of Lactobacillus and 3Bacilluses.The treated diets were fed for 7 weeks.Feed intake,average body weight,diarrhea rate were recorded weekly.At 49-day age,intestinal floras content was measured.The results showed that the body weight gain of birds fed with 0.1% probiotics diet was 10.04%,9.08%,8.53% and 11.65% higher than that of the controls（P〈0.01） in the third,fourth,fifth and sixth week,respectively.No significant difference was observed in other weeks（P〈0.05）.Compared with the control group,the feed conversion rate of chickens fed with 0.1% probiotics diet increased by 19.31%,17.15%,7.08% and 21.56% in the first week（P〈0.01）,the third week（P〈0.01）,the fifth week（P〈0.05）,and the sixth week（P〈0.01）,respectively.There were no significant difference in other weeks（P〈0.05）.During the age from 0 to 6 weeks,the average body weight gain of birds gived 0.1% probiotics diet revealed 12.81% higher than that of the control ones（P〈0.01）.The contents of Eschericltia coli in jejunum and caecum decreased by 26.16% and 27.90%（P〈0.05） in the probiotics group than those of the control one.The content of Lactic acidin entric increased 20.96% and 13.52% in the probiotics group（P〈0.05）.Both the diarrbea rate and the mortality of the probiotics group declined when compared with those of the control（P〈0.05）.