Table 3.

Effects of dietary Zn source and concentration on nutrient digestibility and N balance in growing–furring mink¹

Item	DM,%	CP,%	Fat,%	Ash,%	N intake,g/d	Fecal N,g/d	Urinary N,g/d	N retention,g/d
Added Zn source and concentration, mg/kg
Control
0	63.3	56.1	84.5	26.2	4.83	2.06	2.54	0.19
ZnSO4∙7H2O
100	62.0	63.1	86.5	26.6	4.36	1.67	2.46	0.22
300	63.0	61.8	87.0	26.2	3.41	1.53	2.24	0.24
900	65.8	64.7	87.2	27.1	3.79	1.36	2.13	0.27
ZnGly2
100	62.2	61.8	85.3	27.0	4.08	1.62	2.21	0.21
300	64.6	66.1	87.5	26.0	3.38	1.13	1.99	0.26
900	62.1	67.5	87.3	26.1	4.37	1.48	2.60	0.28
ZnPOS3
100	64.1	63.1	86.6	27.3	3.99	1.44	2.30	0.24
300	63.3	64.1	88.2	26.8	3.91	1.33	2.32	0.26
900	64.2	67.6	88.8	26.1	3.68	1.17	2.21	0.29
SEM	0.4	1.0	1.4	0.5	0.08	0.14	0.09	0.15
Zn sources
ZnSO4	63.5	63.2	86.9	26.6	3.87	1.44	2.19	0.23
ZnGly	63.0	65.0	86.7	26.4	3.89	1.39	2.26	0.24
ZnPOS	63.9	64.9	87.9	26.8	3.86	1.38	2.21	0.26
SEM	0.3	0.7	0.5	0.4	0.08	0.06	0.08	0.09
Zn concentrations, mg/kg
100	62.8	62.7b	86.2b	27.0	4.14	1.58a	2.33	0.23
300	63.7	64.2ab	87.6a	26.3	3.51	1.30b	2.02	0.25
900	64.0	66.7a	87.8a	26.4	3.91	1.31b	2.31	0.28
SEM	0.3	0.7	0.5	0.4	0.08	0.06	0.08	0.09
Linear	0.48	0.003	0.004	0.25	0.071	0.366	0.136	0.122
Quadratic	0.72	0.11	0.10	0.78	0.044	0.167	0.180	0.261
P-values
Sources	0.49	0.30	0.06	0.57	0.941	0.127	0.116	0.376
Concentrations	0.17	0.016	0.006	0.46	0.771	0.024	0.183	0.081
Concentration × source	0.33	0.45	0.59	0.89	0.269	0.219	0.230	0.996

^a,bMeans within a row with different superscripts differ (P < 0.05).

¹Data are expressed as least squares means with pooled SEM; n = 10 per treatment.

²ZnGly = zinc glycinate.

³ZnPOS = Zn pectin oligosaccharides.