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凝结芽孢杆菌对白羽肉鸡生产性能及部分肠道微生物相关指标的影响
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摘要
本试验考察了饮水中添加凝结芽孢杆菌对白羽肉鸡生产性能、肠道微生物数量、挥发性脂肪酸及空肠肠道形态结构的影响。试验将180只7日龄白羽肉鸡随机分为三个处理组,试验组1和试验组2在饮水中添加凝结芽孢杆菌的终浓度分别为105 CFU/mL和106 CFU/mL,对照组饮水和日粮中不添加任何微生态制剂。研究结果表明:饮水中添加高剂量(106 CFU/mL)的凝结芽孢杆菌显著提高了白羽肉鸡的采食量(P<0.05),盲肠食糜中乳酸杆菌数量显著增加(P<0.05),而大肠菌群数量显著降低(P<0.05);高剂量的凝结芽孢杆菌显著促进了丁酸和总挥发性脂肪酸的生成(P<0.05),并增加了空肠绒毛高度/隐窝深度。本试验中凝结芽孢杆菌在饮水中的最适添加量为106 CFU/mL。
A study was carried out to investigate the effect of Bacillus coagulans on the growth performance,cecal microbial population,short-chain fatty acids and jejunum morphology of broilers.A total of 180 seven-day old broilers were divided into three groups,randomly.The experimental treatments were as follows:drinking water(control),drinking water+105 CFU/mL B.coagulans,drinking water+106 CFU/mL B.coagulans.The results showed that the high addition level of B.coagulans significantly promoted broiler' s feed intake(P<0.05),increased Lactobacillus but reduced Coliform population in the cecal digesta(P<0.05).Furthermore,the high addition level of B.coagulans enhanced butyrate and short-chain fatty acid production,correlating with increased jejunal villus height/crypt depth.The optimum level of B.coagulans in the drinking water was 106 CFU/mL in the present study.
引文
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