Table 6 Serum AAs and NH₃ [mg/dL] in piglets on weaning depending on farrowing system (mean ± SD)

BW [kg]

8.20^ab ± 2.22

9.05^a ± 2.05

7.33^b ± 2.49

 Arginine

3.68^a ± 0.71

3.40^ab ± 0.73

2.94^b ± 0.77

 Leucine

2.73^a ± 0.62

2.25^b ± 0.45

2.90^a ± 0.53

 Lysine

3.42^ab ± 0.99

2.85^b ± 0.69

3.70^a ± 1.31

 Methionine

1.11 ± 0.39

1.09 ± 0.28

1.17 ± 0.62

 Proline

7.33^a ± 1.55

6.35^b ± 1.23

7.74^a ± 1.88

 Threonine

3.59^a ± 1.38

3.02^ab ± 1.08

2.49^b ± 0.94

 Tryptophan^*

0.44 ± 0.59

0.56 ± 0.49

0.48 ± 0.51

 Valine

3.17^a ± 0.56

2.50^b ± 0.49

3.29^a ± 1.07

 NH₃

7.62 ± 1.23

7.22 ± 0.87

7.20 ± 1.89