Table 3.

Daily Zn balance, ATTD, and TTTD of Zn for sows during gestation

	Control		DDGS			P-value
Item	ZnSO4	PSZn	ZnSO4	PSZn	SE	Diet	Zn source	Diet * Zn source
No. of sows assigned	8	8	8	8	—	—	—	—
ADFI, kg/d	2.22	2.22	2.22	2.22	—	—	—	—
Diet DM, %	86.8	86.9	88.7	88.3	—	—	—	—
ADFI, kg/d DM	1.93	1.93	1.97	1.96	—	—	—	—
Diet Zn, mg/kg DM	184	129	146	170	—	—	—	—
Diet Ti, mg/kg DM	3,443	3,314	3,087	3,115	—	—	—	—
Zn consumed, mg/d DM	356	249	289	333	—	—	—	—
Ti consumed, mg/d DM	6,646	6,401	6,090	6,112	—	—	—	—
Fecal excretion1, kg/d DM	0.33ab	0.31b	0.38a	0.38a	0.02	<0.01	0.62	0.63
Fecal Zn, mg/kg DM	1,401a	1,220b	911c	822d	37.8	<0.01	<0.01	0.02
Fecal Ti, mg/kg DM	20,682a	22,275a	16,029b	16,194b	1,136.2	<0.01	0.33	0.41
Fecal Zn excreted2, mg/d	462a	385ab	352b	320b	33.2	<0.01	0.03	0.36
Fecal Ti excreted3, mg/d	6,646a	6,401b	6,090d	6,112c	1.6	<0.01	<0.01	<0.01
DM digestibility4, %	82.9xy	83.9x	80.5y	80.4y	1.2	<0.01	0.66	0.59
ATTD Zn5, %	−31.0b	−52.9b,y	−21.9ab,x	4.1a	11.5	<0.01	0.82	0.01
TTTD Zn6, %	−3.2b	−13.1b	13.1ab	34.4a	11.5	<0.01	0.54	0.09
Urine excretion7, kg/d	13.1	12.2	12.2	8.1	4.0	0.53	0.54	0.70
Urine Zn concentration, mg/kg	0.3	0.8	0.5	0.6	0.2	0.99	0.19	0.32
Urine Zn excreted8, mg/d	3	3	4	4	0.6	0.10	0.74	0.80
Total Zn excreted9, mg/d	465a	387ab	356b	324b	33.2	<0.01	0.03	0.36
Zn retained10, mg/d	−110b	−138b	−68ab	9a	33.2	<0.01	0.34	0.04

¹Fecal excretion = DM_intake * (Ti_diet/ Ti_feces).

²Fecal Zn excreted = Zn_feces * Output_feces.

³Fecal Ti excreted = Ti_feces * Output_feces.

⁴DM digestibility, % = [1 −(Ti_diet/Ti_feces)] * 100.

⁵ATTD Zn, % = [1 – (Zn_feces/Zn_diet) x (M_diet/M_feces)] * 100.

⁶TTTD Zn, % = ATTD + [(Zn_end/Zn_diet) * 100].

⁷Represents urine output of the following sows per treatment: ConZnSO₄ = 5; ConPSZn = 3; DDGS/ZnSO₄ = 6; and DDGS/PSZn = 6.

⁸Urine Zn excreted = (Zn_urine * Urine_output).

⁹Total Zn excreted = (Fecal Zn_excreted + Urine Zn_excreted).

¹⁰Zn retained = (Zn_intake – Zn_excreted).

^a–dMeans within a row with different superscripts differ (P < 0.05).

^xyMeans within a row with different superscripts differ (P < 0.10).