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早期断奶仔猪饲粮丙氨酰谷氨酰胺适宜添加量的研究

DOI: 10.3969/j.issn.1006-267x.2012.04.007

Keywords: 早期断奶仔猪,丙氨酰谷氨酰胺,适宜添加量,生长性能,钠泵

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Abstract:

本文旨在研究丙氨酰谷氨酰胺(Ala-Gln)对早期断奶仔猪生长性能、血液生化指标和小肠黏膜酶活性的影响,探讨Ala-Gln在早期断奶仔猪饲粮中的适宜添加量。选用48头(公母各占1/2)纯种云南撒坝仔猪为试验对象,35日龄断奶,按单因素完全随机化设计分为4组,每组3个重复,每个重复4头猪。各组分别饲喂在基础饲粮上添加0(对照组)、0.15%、0.30%、0.45%Ala-Gln的试验饲粮,试验期为35~60日龄。结果表明:1)0.30%组显著提高了全期仔猪平均日增重和平均日采食量(P<0.05),随着Ala-Gln添加水平的提高,全期仔猪平均日增重和平均日采食量以二次曲线方式提高(P=0.004和P=0.006);2)0.30%组极显著提高了49日龄仔猪血清总蛋白、葡萄糖含量及谷丙转氨酶活性(P<0.01),显著提高了血清碱性磷酸酶活性(P<0.05),极显著降低了血清尿素氮含量(P<0.01),显著降低了乳酸脱氢酶活性(P<0.05)。各组血清白蛋白、肌酐含量及肌酸激酶活性均差异不显著(P>0.05)。3)试验组仔猪空肠黏膜钠泵(Na+-K+-ATPase)和总二糖酶活性均显著或极显著高于对照组(P<0.05,P<0.01)。结果提示,添加适量的Ala-Gln对早期断奶仔猪具有一定的促生长效应,在本试验条件下,依据二次曲线拟合结果,推荐Ala-Gln适宜添加量为0.27%。

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