Table 4 Nitrogen balance of piglets in response to the diets with different glucose release kinetic profiles

Nitrogen intake, g/d

39.29

39.58

39.70

40.01

0.19

0.57

Fecal nitrogen, g/d

6.27^b

5.69^c

7.26^a

6.91^a

0.17

 < 0.001

Urinary nitrogen, g/d

7.38^a

5.73^b

6.04^b

4.95^c

0.25

 < 0.001

Total nitrogen excretion, g/d

13.65^a

11.42^b

13.30^a

11.86^b

0.27

 < 0.001

Absorbed nitrogen, g/d

33.02^ab

33.52^a

31.90^c

32.70^b

0.16

 < 0.001

Nitrogen retention, g/d

25.64^b

28.16^a

26.40^b

28.15^a

0.33

 < 0.001

Nitrogen apparent digestibility, %

84.04^b

85.62^a

81.71^c

82.73^c

0.41

 < 0.001

Biological value of feed protein (BVFP)

77.66^b

84.02^a

82.78^a

86.10^a

0.94

 < 0.001