Table 5.

Effects of 0%, 5%, 10%, and 20% of dietary crude glycerin on nitrogen utilization of goats

Item	Dietary crude glycerin (%)				SEM2	Contrasts, p-value1
	0	5	10	20		L	Q	C
N balance (g/d)
Total N intake	22.45	23.20	23.77	22.62	0.84	0.82	0.39	0.75
N excretion (g/d)
Fecal N	5.48	4.89	4.82	4.70	0.76	0.49	0.76	0.86
Urinary N	3.28	6.04	5.76	5.67	1.54	0.44	0.69	0.24
Total N excretion	8.76	10.93	10.58	10.37	1.95	0.65	0.59	0.78
Absorbed N	16.96	18.31	18.95	17.92	1.10	0.46	0.27	0.84
Retained N	13.79	12.27	13.19	12.24	1.96	0.71	0.89	0.66
N output (% of N intake)
Absorbed	75.67	79.22	79.45	79.28	3.17	0.41	0.54	0.82
Retained	61.57	53.38	55.31	53.33	7.78	0.58	0.73	0.73

^a-cMeans within rows followed with different superscript letters are statistically different (p<0.05).

¹Linear (L), quadratic (Q), and cubic (C) effects of CGLY.

²SEM = Standard error of the mean (n = 4).