Effects of zinc–methionine on growth performance, intestinal flora and immune function in pigeon squabs
Effects of zinc–methionine on growth performance, intestinal flora and immune function in pigeon squabs
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DOI：
10.1080/00071668.2014.919375
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发表时间：
2014-05
影响因子：
2
通讯作者：
Y. Wang;YI L.;M. L. Zhao;WU J.Q.;M. Y. Wang;X. C. Cheng
中科院分区：
文献类型：
--
作者：
Y. Wang;YI L.;M. L. Zhao;WU J.Q.;M. Y. Wang;X. C. Cheng
摘要1.给乳鸽饲喂不同浓度的蛋氨酸锌，研究其对雏鸽从孵化到28日龄的生长、免疫功能和肠道菌群的影响。将180只人工孵化的乳鸽随机分为3个处理，每个处理3个重复，每个重复20只乳鸽。三个处理分别是1毫升(2 mg/ml)蛋氨酸锌、1毫升(10 mg/毫升)蛋氨酸锌或1毫升0.9%氯化钠溶液。2.试验结果表明，蛋氨酸锌对乳鸽的生长性能有一定的促进作用。蛋氨酸锌处理组乳鸽的平均日增重和每周平均增重显著高于对照组。3.28日龄时，添加2 mg和10 mg蛋氨酸锌组肉仔鸡的胸腺、脾和法氏囊重量均高于对照组。4.饲喂蛋氨酸锌2 mg和10 mg组雏鸡在第14天和28天的血凝抑制和α-乙酸萘酯酶抗体效价显著高于对照组。5.添加2 mg蛋氨酸锌的乳鸽在第14天和第28天的乳杆菌、乳杆菌、肠球菌和双歧杆菌数量显著高于对照组，而大肠杆菌数量在第28天显著低于对照组。而添加10 mg蛋氨酸锌后28d，乳杆菌、肠球菌和双歧杆菌数量显著减少。6.本研究表明，日粮中添加蛋氨酸锌对鸽的生长性能、免疫功能和肠道菌群调节有积极的作用。2毫克的包涵体水平似乎比每只鸟每天10毫克的蛋氨酸锌要好。
Abstract 1. Different concentrations of zinc–methionine (Zn-Met) were given to pigeon squabs, and the resulting effects on growth, immune functions and intestinal microflora were investigated from hatching to 28 d of age. A total of 180 artificially hatched pigeon squabs were randomly allotted to each of three treatments with three replicates of 20 squabs. The three treatments given were either one ml (2 mg/ml) Zn-Met, one ml (10 mg/ml) Zn-Met or one ml 0.9% NaCl solution. 2. The results showed that Zn-Met improved the growth performance of squabs. The average daily and average weekly weight gain was significantly greater in squabs treated with Zn-Met than in the control group. 3. The group given 2 and 10 mg supplemental Zn-Met had heavier thymus, spleen and bursa of Fabricius than the control group at d 28. 4. Maternal antibody titres against Newcastle disease haemagglutination inhibition and alpha-naphthyl acetate esterase were significantly higher in squabs treated with supplemental 2 and 10 mg Zn-Met compared to the control group at d 14 and d 28. 5. Additionally, the squabs given supplemental 2 mg Zn-Met exhibited significantly higher Bacillaceae, Lactobacillus, Enterococcus and Bifidobacterium populations at d 14 and d 28, but lower Escherichia coli populations at d 28 compared to the control group. On the contrary, Lactobacillus, Enterococcus and Bifidobacterium populations were significantly decreased with 10 mg Zn-Met at d 28. 6. This study indicates that supplementation with Zn-Met has a positive effect on growth performance, immune function and regulation of intestinal flora in pigeons. An inclusion level of 2 mg seems to be better than 10 mg Zn-Met per day per bird.