Abstract: To investigate the effects of active egg white protein on colonic short chain fatty acid(SCFA) of weaned piglets， fifty four 20dayold piglets were randomly divided into three groups， with three replications per group and six piglets each replication. Piglets in group Ⅲ were fed basal diet， the group Ⅰ and group Ⅱ respectively were fed basal diet supplemented with active egg white protein 10 mL·d-1 each piglet and Saccharomyces cerevisiae 10 mL·d-1 each piglet. From the beginning of 23dayold， the piglets in group Ⅰ and group Ⅱ were added to feed the active egg white protein and Saccharomyces cerevisiae for 10 days， and 28dayold piglets were weaned. On 23， 28， 35 and 42dayold， a piglet randomly selected from each replication was slaughtered， both ends of colon were ligated quickly and the colonic digesta were collected aseptically to determine colonic SCFA by gas chromatography. The results showed that: (1) On 28dayold， compared with those in group Ⅲ piglets， the colonic acetic acid(P<001)， propionic acid(P<005)， butyric acid(P<005) and total SCFA(P<001) concentrations in group Ⅰ piglets increased， isobutyric acid concentration in group Ⅰ piglets decreased(P<001); compared with those in group Ⅱ piglets， the colonic acetic acid(P<001)， isobutyric acid(P<001) and total SCFA(P<001) concentrations in group Ⅰ piglets increased; (2) On 42dayold， compared with those in group Ⅱ and group Ⅲ piglets， the colonic acetic acid(P<005)， propionic acid(P<005)， butyric acid(P<005)， isovaleric acid(P<005) and total SCFA(P<005) concentrations in group Ⅰ piglets increased; (3) With the increase of piglet age， total SCFA showed a increasing tendency in every group， but group Ⅰ was most obvious. It followed that active egg white protein could improve colonic SCFA concentration of weaned piglets．

Key words: egg white protein, weaned piglets, short chain fatty acid, colon