提升蛋品质的乳杆菌筛选及其作用机制研究

为筛选可有效提升蛋品质的乳杆菌,试验选取产蛋高峰后期的海兰褐蛋鸡,饲喂三种前期筛选出的肠道优势乳杆菌-乳杆菌A、乳杆菌B、乳杆菌C及其混合菌(乳杆菌A+B+C),连续拌料饲喂30 d。对产蛋性能及蛋品质的分析结果显示,饲喂乳杆菌B以及乳杆菌A+B+C可有效提升海兰褐蛋鸡的综合产蛋率、总蛋重、蛋白高度和蛋黄颜色有较好的提升作用。进一步对十二指肠黏膜的形态学分析结果显示,各乳杆菌组的十二指肠段V/C比值均高于对照组,且乳杆菌B以及乳杆菌A+B+C对V/C比值的提高作用最显著。综上所述,乳杆菌B以及乳杆菌A+B+C可有效提升海兰褐蛋鸡的产蛋性能及蛋品质,且肠黏膜吸收面积增大在此过程中发挥了关键作用。

Screening and mechanism of Lactobacillus for improving egg quality

In order to screen the Lactobacillus which can effectively improve the egg quality,the Hailan brown layers were selected to feed three kinds of intestinal dominant Lactobacillus,namely Lactobacillus A,Lactobacillus B,Lactobacillus C and its mixture(Lactobacillus A+B+C),and the Lactobacillus mixture was fed continuously for 30 days.The results showed that feeding Lactobacillus B and Lactobacillus A+B+C could effectively improve the comprehensive laying rate,total egg weight,protein height and yolk color of Hailan layers.Further morphological analysis of duodenal mucosa showed that the ratio of V/C in duodenal segment of each Lactobacillus group was higher than that of the control group,and the effect of Lactobacillus B and Lactobacillus A+B+C on V/C ratio was most significant.In conclusion,Lactobacillus B and Lactobacillus A+B+C can effectively improve the laying performance and egg quality of Hailan layers,and the increase of intestinal mucosal absorption area plays a key role in this process.