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共轭亚油酸对蛋鸡生产性能、蛋壳质量和血清生化指标的影响

DOI: 10.3969/j.issn.1006-267x.2012.05.018

Keywords: CLA,生产性能,蛋壳质量,血清生化指标,ALP,内分泌激素,CPT-Ⅰ

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Abstract:

为了研究共轭亚油酸(CLA)对蛋鸡生产性能和蛋壳质量的影响及机理,试验选用40周龄健康、体重和产蛋率相近的海兰白蛋鸡480只,采用单因素试验设计,随机分为4组,每组3个重复,每个重复40只,试验组分别添加0.5%、1.0%和2.0%的CLA,对照组不添加,试验期8周。试验结束时,每组选6只采血并屠宰,测定血清中三碘甲腺原氨酸(T3)、四碘甲腺原氨酸(T4)、皮质醇、雌二醇(E2)、钙离子、磷离子含量和碱性磷酸酶(ALP)活性及肝脏肉毒碱棕榈酰转移酶(CPT-Ⅰ)活性。结果表明:1)各试验组蛋鸡生产性能与对照组均差异不显著(P>0.05)。2)各试验组蛋壳强度均显著大于对照组(P<0.05),蛋壳厚度均差异不显著(P>0.05)。3)2.0%CLA组蛋鸡血清T3、T4、皮质醇和E2含量显著高于对照组及0.5%和1.0%CLA组(P<0.05);各试验组蛋鸡血清钙、磷离子浓度与对照组差异不显著(P>0.05);0.5%和1.0%CLA组蛋鸡血清ALP活性显著高于对照组(P<0.05)。4)1.0%和2.0%CLA组蛋鸡肝脏CPT-Ⅰ活性显著低于对照组(P<0.05)。由此可见,在本试验条件下,饲粮添加1.0%的CLA能显著提高蛋鸡血清中ALP活性,并在一定程度上促进E2的分泌,显著提高蛋壳强度,且不影响蛋鸡的生产性能。

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