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. 2022 May 6;6(2):txac058. doi: 10.1093/tas/txac058

Table 1.

Composition of phases 1 and 2 diets (as-fed basis)

Phase 1 Phase 2
No DDGS DDGS No DDGS DDGS
Item Normal Thr High Thr Normal Thr High Thr Normal Thr High Thr Normal Thr High Thr
Ingredients, %
 Corn 72.67 72.60 50.34 50.27 78.90 78.84 55.75 55.70
 Soybean meal 24.64 24.65 6.82 6.82 18.51 18.51 1.49 1.49
 Corn DDGS 40.00 40.00 40.00 40.00
 Limestone 0.95 0.95 1.35 1.35 0.95 0.95 1.35 1.35
 Monocalcium P (21% P) 0.60 0.60 0.55 0.55
 Salt 0.50 0.50 0.50 0.50 0.50 0.50 0.50 0.50
l-Lys-HCl 0.30 0.30 0.60 0.60 0.30 0.30 0.58 0.58
dl-Met 0.08 0.08 0.03 0.03 0.05 0.05
l-Thr 0.08 0.14 0.12 0.19 0.08 0.13 0.11 0.17
l-Trp 0.01 0.01 0.07 0.07 0.02 0.02 0.07 0.07
 Mineral–vitamin premix 0.15 0.15 0.15 0.15 0.13 0.13 0.13 0.13
 Phytase|| 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03
Total 100 100 100 100 100 100 100 100
Calculated analysis
SID amino acids, %
 Lys 1.02 1.02 1.02 1.02 0.87 0.87 0.87 0.87
 Ile:Lys 62 62 55 55 61 61 55 55
 Leu:Lys 136 136 169 169 144 143 184 184
 Met:Lys 33 33 32 32 32 32 32 32
 Met and Cys:Lys 58 58 58 58 58 58 60 60
 Thr:Lys 61 67 61 67 62 68 62 68
 Trp:Lys 19.1 19.1 19.1 19.1 19.1 19.1 19.1 19.1
 Val:Lys 69 69 69 69 70 70 71 71
SID Lys:NE, g/Mcal 4.13 4.13 4.14 4.14 3.47 3.47 3.49 3.49
NE, kcal/kg 2,472 2,472 2,461 2,461 2,509 2,509 2,492 2,494
CP, % 18.14 18.19 19.39 19.43 15.72 15.76 17.25 17.28
Ca, % 0.58 0.58 0.61 0.61 0.55 0.55 0.59 0.59
P, % 0.49 0.49 0.47 0.47 0.46 0.45 0.45 0.45
STTD P, % 0.37 0.37 0.37 0.37 0.35 0.35 0.36 0.36
NDF, % 8.64 8.64 18.55 18.54 8.71 8.70 18.60 18.60
IDF, %$ 11.90 11.89 20.28 20.28 11.54 11.54 19.97 19.97

IDF, insoluble dietary fiber; NDF, neutral detergent fiber; STTD, standard total tract digestibility.

Phases 1 and 2 were fed from 34.9 to 57.4, and 57.4 to 82.5 kg, respectively.

Provided per kilogram of diet: 110 mg Zn, 110 mg Fe, 0.30 mg I, 0.30 mg Se, 5,290 IU vitamin A, 1,323 IU vitamin D, 26.5 IU vitamin E, 1.2 mg vitamin K, 22.5 mg niacin, 7.5 mg pantothenic acid, 2.25 mg riboflavin, and 11 µg vitamin B12.

Optiphos 2000 (Huvepharma Inc. Peachtree City, GA) provided 858.7 units of phytase/kg of diet with an assumed release of 0.12% STTD P.

Insoluble digestible fiber. Matrix loading values are derived from Navarro (2018).