Table 7. TDN intake and TDN conversion in Holstein steers

Item	22 month		24 month		p-value1)
	T12)	T2	T3	T4
Fattening phase
TDN intake (kg/head/day)	5.45	5.63	5.43	5.52
Concentrate	4.66	4.80	4.65	4.76	0.6287
Rice straw	0.79	0.83	0.78	0.76	0.7854
TDN conversion ratio (kg/kg)	5.32	4.54	4.64	4.49
Finishing phase
TDN intake (kg/head/day)	9.39	9.63	8.76	8.85
Concentrate	8.86	9.07	8.31	8.37	0.5932
Rice straw	0.53	0.56	0.45	0.48	0.6271
TDN conversion ratio (kg/kg)	8.23	7.64	7.55	7.38
Overall period
TDN intake (kg/head/day)	8.37	8.60	8.04	8.12
Concentrate	7.77	7.97	7.51	7.57	0.2748
Rice straw	0.60	0.63	0.53	0.54	0.3487
TDN conversion ratio (kg/kg)	7.28	6.88	6.93	6.70

Probability of the F test.
Each group were set to 70% (T1) and 72% (T2) during fattening phase and 74% (T3) and 76% (T4) for the finishing phase, respectively.
TDN, total digestible nutrients.