Table 4.

Blood metabolites of bulls fed on experimental diets with different levels of crude protein

Parameters	Dietary treatments			SEM	p-value
	LCP	MCP	HCP		Linear	Quadratic
Glucose (mmol/L)	4.85	4.77	4.82	0.178	0.890	0.763
Cholesterol (mmol/L)	3.45	3.87	3.95	0.248	0.203	0.641
Blood urea nitrogen (mmol/L)	2.47b	2.64ab	2.95a	0.139	0.045	0.717
Triglycerides (mmol/L)	0.07	0.06	0.05	0.009	0.400	0.918
Total protein (g/L)	60.48	52.83	56.58	3.537	0.440	0.246

LCP, low crude protein; MCP, medium crude protein; HCP, high crude protein; SEM, standard error of mean.

^a,bWithin the same row with different superscripts means significant difference (p<0.05).