Table 3. Growth performance of steers under rumen-protected L-tryptophan supplementation

Item	Control	Treatment	SEM	p-value
Initial body weight (kg)	420.5	428.8	32.1	0.806
5 weeks
Body weight after 5 weeks (kg)	457.0	480.8	27.95	0.570
Average daily gain (kg/d)	1.04	1.49	0.25	0.263
Dry matter intake (kg/d)	7.22	7.61	0.39	0.498
Gain:Feed	0.17	0.24	0.11	0.224
10 weeks
Body weight (kg)	493.8	510.5	27.0	0.676
Average daily gain (kg/d)	0.97	0.79	0.12	0.339
Dry matter intake (kg/d)	8.12	7.94	0.48	0.792
Gain:Feed	0.13	0.11	0.02	0.427