本试验旨在探索添加乳酸菌微生态制剂对白羽王鸽生产性能、免疫器官指数、血清免疫球蛋白G( IgG)含量和肠道菌群的影响。选用1日龄白羽王鸽乳鸽60只,随机分成3组,每组20只。第1组为对照组,第2和3组为乳酸菌微生态制剂组,乳酸菌微生态制剂每日添加量分别为2×106和5×106 CFU。预试期2 d,正试期16 d。结果如下：与对照组相比,19日龄时,日添加2×106和5×106 CFU组,分别提高了乳鸽末重8.29%和15.10%(P<0.05),降低了料重比6.36%和8.66%(P<0.05),提高了乳鸽血清IgG含量10.09%和17.98%(P<0.05),降低了肠道内容物大肠杆菌数量4.27%和9.26%( P<0.05),提高了乳酸菌数量5.41%和9.71%( P<0.05)；日添加5×106 CFU组与对照组比较,法氏囊和胸腺指数分别提高了16.07%和8.33%(P<0.05)。由此可知,乳酸菌微生态制剂能够提高白羽王鸽生产性能,并增强其免疫机能,本试验条件下白羽王鸽的乳酸菌微生态制剂最佳日添加剂量为5×106 CFU。%The objective of this experiment was to study the effects of Lactobacillus microecologics on growth performance, immune organ indexes, serum immune globulin G ( IgG ) content and intestinal microflora of white wing pigeons. Sixty one-day-old white wing pigeons were randomly divided into 3 groups with 20 pi-geons per group. Group 1 was control group. Groups 2 and 3 were Lactobacillus microecologics groups, sup-plemented with 2×106 and 5×106 CFU/d, respectively. The pre-trial period lasted for 3 days, and the experi-ment lasted for 16 days. The result showed as follows: at the age of 19 days, compared to control group, the Lactobacillus microecologics groups with 2×106 and 5×106 CFU/d increased the final body weight by 8.29%and 15.10% ( P<0.05) , reduced the ratio of feed to gain by 6.36% and 8.66% ( P<0.05) , increased the ser-um IgG content by 10.09% and 17.98% (P<0.05), reduced the E.coli number by 4.27% and 9.26% (P<0.05), increased the Lactobacillus numbers by 5.41% and 9.71% (P<0.05), respectively. In comparison with the control group, the Lactobacillus microecologics groups with 5 × 106 CFU/d enhanced the indexes of bursal and thymus by 16.07% and 8.33% ( P<0.05) , respectively. In conclusion, Lactobacillus microecolog-ics can improve growth performance, and enhance the immune function. The optimal daily supplement for white wing pigeons was 5×106 CFU under this experimental condition.
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