Total Activities1 of aminopeptidase N, dipeptidyl-peptidase IV and sucrase in the jejunum and ileum of pigs born to control or antibiotics-treated sows and slaughtered at different ages (LSmeans and SEM, n = 9–12 per treatment and age).

1Total activity (µmoles/min/g mucosa); × 10−3 for DPP-IV.2treat.: Treatment of sows pre- and post-partum (control versus antibiotics); age (d14 and d28, unweaned; d42 weaned at d28); treat.*age: treatment by age interaction.a,bMeans within rows with different letters differ (P1. 总活性（单位：微摩尔/（分钟·克黏膜））；二肽基肽酶IV（DPP-IV）的检测结果需乘以10⁻³。 2. 处理因素：母猪产前及产后干预（对照组 vs 抗生素处理组）；日龄分组：d14、d28日龄为未断奶仔猪组，d42日龄为28日龄断奶仔猪组；处理×日龄：处理与日龄的交互作用。 a、b：行内带有不同字母的平均值差异具有统计学意义（P