Treatment

CON

GR1

GR2

GR effect

Dry matter

Intake, g/d

1914.0

1872.6

1868.2

0.67

Digestibility, %

71.0^b

75.0^a

78.8^a

0.05

Crude protein

Intake, g/d

267.0

262.1

267.2

0.58

Digestibility, %

71.0

74.0

75.0

0.21

Neutral detergent fiber

Intake, g/d

1052.7^a

880.1^b

846.3^b

0.05

Digestibility, %

50.0^b

56.0^a

58.0^a

0.05

Acid detergent fiber

Intake, g/d

354.1^a

330.3^b

310.0^b

0.05

Digestibility, %

44.0^b

50.0^a

54.0^a

0.05

Average daily gain, g/d

220^b

280^a

310^a

0.05

Feed conversion

8.9^b

7.0^a

7.3^a

0.05

Cost of gain, $

30^b

26.2^a

25.1^a

0.05