Table 5.

Nitrogen utilization of Tan sheep grazed fed diets supplemented with EFE in summer and winter (n = 20)

Item1	Summer2				Winter
	Treatment3		SEM4	P-value	Treatment		SEM	P-value
	CON	EFE			CON	EFE
N intake, g/d	16.64	19.85	0.514	<0.001	11.91	13.60	0.395	0.028
Fecal N, g/d	5.28	5.43	0.126	0.371	4.83	4.71	0.170	0.081
Fecal N/ N intake, %	31.73	27.36	0.968	0.009	40.55	34.63	1.256	0.053
Urinary N, g/d	5.58	5.85	0.158	0.402	4.65	4.73	0.113	0.734
Urinary N/ N intake, %	33.51	29.58	0.872	0.020	38.98	35.18	0.888	0.028
Excretion N, g/d	10.86	11.28	0.256	0.336	9.48	9.44	0.279	0.770
Excretion N/ N intake, %	65.26	56.83	1.688	0.006	79.60	60.41	2.099	0.036
Digestible N, g/d	11.36	14.41	0.485	0.001	7.08	8.89	0.343	0.015
Retained N, g/d	5.78	8.57	0.454	0.001	2.43	4.16	0.343	0.022
Retained N/ N intake, %	34.74	43.17	1.688	0.006	20.40	39.59	2.099	0.036
Retained N/ DN, %	50.88	59.47	1.919	0.009	34.32	46.79	3.151	0.047

¹N, nitrogen; DN, digestible nitrogen: Intake N—Fecal N; Retained N: DN—Urinary N.

²Summer grazing from early mid-June and ended in early mid-September each year, winter grazing from early mid-November to early January.

³CON, 30 mL of normal saliney; EFE, mix 1 g of exogenous fibrolytic enzymes with 30 mL water.

⁴SEM = treatment standard error of the mean.