Effects of weanling age on the performance and digestive enzyme activities in weanling piglets

Forty-eight piglets were selected from 9 litters and randomly divided into two groups: weanled on the 23rd and 28th days by using crossbred(Duroc×Landrace×Large White) piglets.Every group takes the samples at 0,3,7 and 14 day,respectively after weanling.The results showed that weanling on the different day have prominent influence on production performance of the piglets.The ADG and ADFI of piglet weaning on the 28th day were higher than that of piglet weaning on the 23th day notably.In addition,various digestive enzyme activities in digestive ferment of piglets weanled on the 28th day were higher than the 23rd of the same period age piglets in 2 weeks after weanling.