Table 2.

Effects of different levels of range cube (32% crude protein) on the intake, average daily gain, and the gain-to-feed ratio of diets with limpograss silage ad libitum.

	Protein Supplement Levels (kg·d−1) *					Order Effect
Intake, kg·d−1	0	1.4	2.8	4.2	SEM	L	Q
DM
Silage	6.4	6.5	5.2	5.2	0.01	0.070	0.190
Supplement	-	1.4	2.8	4.2	0.01	<0.0001	<0.0001
Total	6.4	7.8	8.0	9.2	0.12	0.002	0.010
Total, %BW	1.9	2.3	2.3	2.7	0.03	0.010	0.020
OM Total, %BW	1.8	2.1	2.1	2.4	0.03	0.010	0.030
CP Total, %BW	0.1	0.3	0.4	0.5	0.02	<0.0001	<0.0001
NDF Total, %BW	1.3	1.6	1.6	1.8	0.02	0.010	0.020
ADG, kg	−0.32	0.42	0.61	0.73	0.03	0.0003	<0.0001
G:F	−0.05	0.05	0.08	0.08	0.005	0.070	0.100

* 0 = Ad libitum access to limpograss silage. 1.4 = Ad libitum access to limpograss silage and supplementation of 1.4 kg·DM·d⁻¹ of the cube (32% CP, DM basis). 2.8 = Ad libitum access to limpograss silage and supplementation of 2.8 kg·DM·d⁻¹ cube (32% CP, DM basis). 4.2 = Ad libitum access to limpograss silage and supplementation of 4.2 kg·DM·d⁻¹ of the cube (32% CP, DM basis). SEM, Standard error of treatment means, n = 6 animals per treatment. L, linear effect; Q, quadratic effect; DM, dry matter; OM, organic matter; CP, crude protein; NDF, neutral detergent fiber; ADG, average daily gain; G:F, gain to feed. For silage and cubes samples, (n = 3).