项目 | 对照组 | 试验1组 | 试验2组 | 试验3组 |
37日龄 | 51.59 ± 1.17a | 51.81 ± 1.35a | 56.30 ± 3.86a | 54.47 ± 4.36a |
44日龄 | 51.81 ± 2.78a | 55.83 ± 2.06a | 52.09 ± 1.24a | 55.08 ± 4.05a |
51日龄 | 49.84 ± 2.15a | 50.32 ± 1.82a | 51.56 ± 1.19a | 51.81 ± 0.82a |