The 2N HCl-AIA contents of the fecal samples in different fecal collec-tion period were also determined,and the mixed samples of the 6th,7th,and 8th days showed no significant difference(P>0.05).

• 试验测定了收粪期长短不同的粪样中2NHCl-AIA 含量；结果:6天、7天和8天的混合粪样差异不显著(P>0.；05)