作　　者： ; ; (等）;

机构地区： 中国农业科学院北京畜牧兽医研究所

出　　处： 《动物营养学报》 2001年第1期25-30,共6页

摘　　要： 将12窝三元杂交仔猪随机分为4组即第一、二、三和四组 ,分别于17、21、28和35日龄断奶 ,测定断奶前后胰腺组织和十二指肠、空肠、回肠的食糜及粘膜中胰蛋白酶的相对活性、比活和总活性。结果发现在哺乳期胰腺胰蛋白酶的活性比较稳定 ,断奶后除了第四组外 ,相对活性均降低。其中第一组在降低后3周内无回升 ,第二组在降低后2周开始回升 ,第三组在降低后1周开始回升。胰蛋白酶的比活在断奶后除了第一组降低外(P>0.05) ,其它各组均不降低。断奶前后胰腺胰蛋白酶总活性均随日龄增加(P<0.05)。空肠胰蛋白酶活性在哺乳期较为稳定 ,其断奶后的动态变化表明 :断奶日龄早于28日龄时 ,断奶后1周这种酶的活性降低 ,而28、35日龄断奶 ,断奶后这种酶的活性不受影响 ,而且断奶日龄越早 ,降低后恢复的时间越长。日龄和断奶对十二指肠和回肠胰蛋白酶的活性无明显影响。 12 litters of new born piglets ,divided randomly into group Ⅰ、Ⅱ、Ⅲ and Ⅳ and weaned at 17、21、28 and 35 days of age,respectivly,were used to determine the effect of weaning ages on pancreatic and intestinal trypsin activities.The results showed that pancreatic and intestinal trypsin activitits were stable during sucking stage,and the relative activity of pancreatic trypsin decreased in all groups except group Ⅳ.It took 3 weeks、2 weeks and 1 week for group Ⅰ、Ⅱand Ⅲ,respectively,to restore the relative activity of pancreatic trypsin after weaning.Specific activity of pancreatic trypsin decreased only group I after weaning.Total activity of pancreatic trypsin increased as days of age lengthened(P<0.05%).Jej-unum trypsin activity decreased after weaning in group Ⅰ and Ⅱ but did not in group Ⅲ and Ⅳand the earlier the weaning the longer the restoring time.The weaning age and weaning practice had no significant effect on duodenum and ileum trypsin activity.

关 键 词： 断奶日龄 胰蛋白酶 胰腺 小肠 仔猪 酶活性

领　　域： [农业科学] [农业科学] [农业科学] [农业科学] [农业科学]