However with the increase of threonine the activity of threonine dehydrase in liver decreased and no significant differences were found among groups ( P0.05 ) .

肝脏 苏氨酸 脱水 酶活性随 饲料 中 Thr 水平的升高有下降趋势，但各 处理组间无显著差异（P0.05）。