Table 8.

Effect of supplementing ruminally protected lysine (LYS), arginine (ARG), or their combination on chemical composition (g/100g) of meat

	Treatment1,2					P-value
Item, g/100 g	CON	ARG	LYS	LYS +ARG	SEM3	ARG	LYS	LYS × ARG
Moisture	70.0	70.3	70.5	71.6	0.43	0.11	0.06	0.09
Protein	23.0	22.7	22.9	22.4	0.32	0.27	0.51	0.63
Lipids	5.8	5.8	5.4	4.8	0.55	0.59	0.23	0.58
Ash	1.2	1.2	1.2	1.2	0.03	0.18	0.16	0.13

¹Treatments were 1) a diet with no arginine or lysine supplementation (CON), 2) rumen-protected arginine (16% metabolizable arginine, Ajinomoto Heartland, Chicago, IL) top-dressed at 63 g/steer daily (ARG), 3) rumen-protected lysine (25% metabolizable lysine, AjiPro-L, Ajinomoto Heartland) top-dressed at 40 g/steer daily (LYS), and 4) a diet with both arginine and lysine top-dressed at 63 and 40 g/steer daily, respectively (ARG + LYS).

²Five pens/treatment; 2 steers/pen sampled.

³Standard error of the mean.