Table 3 Growth performance and skeletal muscle mass weight of growing-finishing pigs fed the restricted protein diets¹

 Initial body weight, kg

62.33

62.30

62.28

0.88

0.99

 Final body weight, kg

101.43^a

97.88^ab

94.02^b

1.45

<0.01

 Average daily gain, g/d

782.00^a

711.67^b

634.33^c

16.84

<0.01

 Average daily feed intake, g/d

2, 819.30^a

2, 614.70^ab

2, 547.50^b

76.50

0.05

 Feed:Gain ratio

3.60^b

3.67^b

4.02^a

0.06

<0.01

  Longissimus dorsi muscle, g

2854.3^b

3182.13^a

2922.5^b

66.57

0.09

  Psoas major muscle, g

437.03

455.33

404.37

11.35

0.18

  Biceps femoris muscle, g

1683.9

1621

1582.37

28.16

0.35