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低聚异麦芽糖对产蛋鸡生产性能、盲肠微生物和免疫机能的影响

DOI: 10.3969/j.issn.1006-267x.2011.09.015

Keywords: 低聚异麦芽糖,产蛋鸡,生产性能,盲肠微生物,免疫机能

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Abstract:

本试验旨在研究饲粮中添加低聚异麦芽糖(IMO)对产蛋鸡生产性能、盲肠微生物菌群、机体抗氧化和免疫机能的影响。试验选取600只体重和产蛋率相近的200日龄海兰褐产蛋鸡,随机分成5个处理(饲粮中分别添加0、0.1%、0.2%、0.4%和0.8%的IMO),每个处理6个重复,每个重复20只鸡。试验期8周。结果表明,与对照组相比,饲粮添加低剂量(0.1%和0.2%)IMO可在一定程度上改善平均蛋重、产蛋率、产蛋量和料蛋比,改善鸡蛋蛋白高度和哈夫单位;0.8%IMO组产蛋鸡的生产性能和鸡蛋品质均较低剂量组差。饲粮添加0.2%和0.4%IMO能显著增加产蛋鸡血浆球蛋白比例、降低尿素氮含量(P<0.05);0.2%IMO组能显著降低产蛋鸡盲肠食糜大肠杆菌的数量、增加乳酸杆菌和双歧杆菌的数量(P<0.05);0.2%和0.4%IMO组产蛋鸡血清中超氧化物歧化酶、谷胱甘肽过氧化物酶和总抗氧化酶活性显著升高(P<0.05);0.2%~0.8%IMO组产蛋鸡血浆免疫球蛋白A、免疫球蛋白M、免疫球蛋白G和溶菌酶均显著提高(P<0.05)。结果提示,饲粮添加IMO可优化产蛋鸡盲肠菌群结构,提高产蛋鸡抗氧化和免疫功能,改善生产性能。产蛋鸡饲粮中IMO的适宜添加量为0.2%。

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