Table 1.

Ingredient and nutrient composition of gestation diets (as-fed basis)¹

	Control		DDGS
Items	ZnSO4	PSZn	ZnSO4	PSZn	LowZn
Ingredient composition, %
Corn	89.29	89.29	54.52	54.52	89.29
DDGS	—	—	40.00	40.00	—
Soybean meal, 46.5% CP	7.71	7.71	2.88	2.88	7.71
Monocalcium phosphate, 21%	1.01	1.01	0.28	0.28	1.01
Limestone	0.99	0.99	1.32	1.32	0.99
Salt	0.50	0.50	0.50	0.50	0.50
ZnSO4 premix2	0.50	—	0.50	—	—
PSZn premix3	—	0.50	—	0.50	—
Zn-free premix4	—	—	—	—	0.50
Total	100.00	100.00	100.00	100.00	100.00
Calculated nutrient composition
ME, kcal/kg	3,319	3,319	3,334	3,334	3,319
Crude protein, %	11.00	11.00	16.83	16.83	11.00
Crude fiber, %	2.43	2.43	4.49	4.49	2.43
Crude fat, %	3.72	3.72	5.22	5.22	3.72
NDF, %	9.36	9.36	17.73	17.73	9.36
SID Lys, %	0.38	0.38	0.38	0.38	0.38
SID Trp, %	0.09	0.09	0.10	0.10	0.09
SID Thr, %	0.33	0.33	0.45	0.45	0.33
SID Met + Cys, %	0.38	0.38	0.51	0.51	0.38
Calcium, %	0.60	0.60	0.60	0.60	0.60
Phosphorus, total %	0.52	0.52	0.51	0.51	0.52
STTD Phosphorus, %	0.26	0.26	0.26	0.26	0.26
Zinc added, ppm	100	100	100	100	0
Zinc total, ppm	123	123	146	146	23
Analyzed composition
Moisture, %	13.2	13.1	11.2	11.7	13.2
Crude protein, %	9.5	9.2	17.5	17.1	9.6
Crude fat, %	1.9	2.0	3.4	3.4	1.8
Crude fiber, %	1.7	1.7	3.6	3.5	1.8
Ash, %	4.4	4.4	5.0	4.7	4.5
Zinc total, ppm5	160.0	112.0	130.0	150.0	21.6

¹Titanium dioxide used as indigestible marker added at 0.50% of the diet.

²Contained the following nutrients per kilogram of premix: vitamin A, 3,742,468 IU; vitamin D₃, 748,493 IU; vitamin E, 40,827 IU; vitamin K, 220 mg; riboflavin, 716 mg; niacin, 1,918 mg; pantothenic acid, 2,315 mg; vitamin B₁₂, 7 mg; iodine, 66 mg; selenium, 66 mg; zinc (as zinc sulfate monohydrate), 44,092 mg; iron, 35,274 mg; manganese, 11,023 mg; copper, 8,818 mg.

³Premix as above but SQM Zn (QualiTech, Chaska, MN) was the source of zinc.

⁴Premix as above but containing no supplemental zinc.

⁵Average of two dietary sample analyses.