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自然霉变玉米对仔猪肠道微生态的影响

DOI: 10.3969/j.issn.1006-267x.2011.10.020

Keywords: 霉变玉米,仔猪,生长性能,肠道菌群,代谢产物

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Abstract:

本试验旨在研究自然霉变玉米对仔猪生长性能、肠道形态和肠道微生物数量及其代谢产物的影响。15头35日龄的PIC仔猪按体重相近的原则随机分为3个处理,分别为对照组(饲喂玉米-豆粕型基础饲粮)、霉变玉米组(饲喂由自然霉变玉米100%替代基础饲粮中正常玉米的饲粮)和采食量配对组(饲喂基础饲粮,采食量与霉变玉米组相同),每个处理5个重复,每个重复1头仔猪。试验期21d。结果发现,在试验前2周,霉变玉米组仔猪的平均日增重和平均日采食量与对照组相比有降低的趋势(P>0.05),而全期平均日增重显著高于采食量配对组(P<0.05),料重比显著低于采食量配对组(P<0.05)。霉变玉米组仔猪空肠绒毛高度与隐窝深度的比值显著低于对照组和采食量配对组(P<0.05),隐窝深度显著高于采食量配对组(P<0.05)。霉变玉米组仔猪第2周末直肠中乙酸和总挥发性脂肪酸含量显著低于采食量配对组(P<0.05)。霉变玉米组仔猪第3周末盲肠中大肠杆菌数、乳酸杆菌数和丙酸含量显著高于对照组(P<0.05),氨含量有提高的趋势(P>0.05)。结果表明,自然霉变玉米可损伤仔猪空肠形态结构,提高仔猪盲肠中大肠杆菌数和乳酸杆菌数,改变仔猪肠道微生物区系,进而影响仔猪健康。

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