Table 3.

Urinary purine derivatives, creatinine, and PDC index in total urine and microbial N in lambs

Item	C:F 40:60		C:F 60:40		SEM	p-value
	High UDP	Low UDP	High UDP	Low UDP		C:F	UDP	C:F×UDP
Urinary PD (mmol/d)
Total	10.1	11.77	14.33	12.96	1.34	0.02	0.41	0.28
Allantoin	8.55	9.92	12.23	10.96	1.22	0.03	0.46	0.34
Uric acid	0.78	1.06	1.30	1.23	0.020	0.10	0.60	0.46
Xanthine+hypoxanthine	0.79	0.82	0.85	0.86	0.016	0.13	0.23	0.16
Creatinine (mmol/d)	7.52	7.37	7.54	7.40	0.18	0.86	0.57	0.33
Microbial N (g/d)1	11.75	13.82	17.02	15.38	2.07	0.02	0.31	0.22
PDC index2	31.22	37.09	41.47	40.76	4.42	0.04	0.41	0.61

¹Microbial N was calculated according to Chen and Gomes (1995).

²PDC index = PD/Creatinine×BW^0.75.