巴甫洛夫(1897)说“动物与周围环境的主要联系是通过大家都知道的必须经常进入机体组成成分的化学物质的联系,也就是通过饮食的联系。”这种联系依赖于消化器官的功能,而消化酶的活动又在消化过程中起着主要作用。因此,在动物发育过程中消化器官内消化酶出现的正常情况就成了一个非常重要而又有兴趣的问题。直到目前,关于这方面的工作,文献中尚缺乏完整的系统研究报告。 Pavlov (1897) states that “the primary linkages between animals and the environment are through the connection of chemical substances, which are known to all of us, that often have to enter the body’s constituent elements, that is, through diet.” The link depends on the digestive organs Function, and digestive enzymes activity plays a major role in digestion. Therefore, the normal occurrence of digestive enzymes in the digestive organs during animal development has become a very important and interesting issue. Up to now, there is still a lack of a complete systematic study on this topic.