CC-Dp对伊犁马驹麦草采食量和血清激素的影响

本试验旨在探讨日粮中添加CC-Dp对马驹麦草采食量和血清中摄食调控激素的影响。选取20匹17月龄健康无病、体况和采食量相近的伊犁马驹,采用单因素试验设计,随机分为4组,每组5匹,对照组饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ组分别在基础日粮中添加500、1000、1500 mg/kg CC-Dp。预试期7 d,正试期30 d。结果表明,与对照组相比,试验Ⅱ组马驹麦草采食量在试验第1~15天显著提高(P<0.05),血清中胆囊收缩素(CCK)和γ-氨基丁酸(GABA)含量在试验进行1~15 d分别显著降低和升高(P<0.05);与对照组相比,试验Ⅲ组马驹麦草采食量在试验全期内显著提高(P<0.05),血清中CCK含量在试验进行1~15 d极显著降低(P<0.01)、16~30 d显著降低(P<0.05),血清中GABA含量在试验全期均显著提高(P<0.05);各组间血清中神经肽Y(NPY)、5-羟色胺(5-HT)、瘦素(LEP)含量差异均不显著(P>0.05)。综上所述,日粮中添加1500 mg/kg CC-Dp能显著提高伊犁马驹麦草采食量,显著降低血清中胆囊收缩素含量,显著升高血清中γ-氨基丁酸含量,推测其作用机制可能是通过降低动物体内胆囊收缩素水平以调控动物的采食,且与γ-氨基丁酸的调控途径有关。

Effect of CC-Dp on the Straw Intake and Serum Hormone of Yili Colt

This paper was conducted to investigate the effect of CC-Dp on the colts straw intake and regulation hormone in the serum.20 17-month-old healthy Yili female colts with similar body condition and intake were randomly divided into four groups and 5 colts in each group. The control group was fed with basic diet,groups Ⅰ,Ⅱ and Ⅲ were fed the basal diet supplemented with 500,1000,1500 mg/kg CC-Dp,respectively. Pre-trial period was 7 d,formally trial period was 30 d.The results showed that compared with the control group,the average straw intake in group Ⅱ was significantly increased during 1 to 15 days (P<0.05),the serum CCK and GABA contents was significantly decreased and increased during 1 to 15 days,respectively (P<0.05).Compared with the control group,the average straw intake in group Ⅲ was significantly increased in the whole period (P<0.05),the serum CCK content was extremely significantly decreased during 1 to 15 days (P<0.01),and was significantly decreased during 16 to 30 days (P<0.05),the serum GABA content was significantly increased in the whole period (P<0.05).The were no significant differences in the serum NPY,5-HT and LEP contents among all groups (P>0.05).In conclusion,the basal diet supplemented with 1500 mg/kg CC-Dp could significantly improve the straw intake,reduce the serum CCK content and increase the serum GABA content of colt. Speculated that the mechanism of CC-Dp in animal feed intake regulation was probably through reducing levels of CCK in vivo,and might be related with GABA regulatory pathways.