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. 2021 Dec 22;9:e12636. doi: 10.7717/peerj.12636

Table 7. Study D: composition and calculated analysis of creep feed, starter (0–14 d of age) and grower diets (15–42 d of age).

Ingredient/Nutrient Units Creep feed1 Starter diet Grower diet
T1 Control (no Fe added) T2 Ferrous (II) sulphate2 T3 Ferric (III) oxide2 T4 Ferric citrate3 T5 Ferric citrate + ferrous (II) sulphate4 T1 Control (no Fe added) T2 Ferrous (II) sulphate2 T3 Ferric (III) oxide2 T4 Ferric citrate3 T5 Ferric citrate + ferrous (II) sulphate4
Corn % 50.57 63.46 63.46 63.46 63.46 63.46 70.70 70.70 70.70 70.70 70.70
Soybean meal (CP 49%) 24.38 19.80 19.80 19.80 19.80 19.80 21.51 21.51 21.51 21.51 21.51
Skimmed milk powder 20.00 10.00 10.00 10.00 10.00 10.00
Mineral & vitamin premix* 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20 1.20
Calcium carbonate 1.15 1.38 1.38 1.38 1.38 1.38 1.43 1.43 1.43 1.43 1.43
Monocalcium phosphate 1.10 1.40 1.40 1.40 1.40 1.40 1.60 1.60 1.60 1.60 1.60
Soybean oil 1.00 0.54 0.54 0.54 0.54 0.54 1.17 1.17 1.17 1.17 1.17
L-lysine HCL 0.30 0.60 0.60 0.60 0.60 0.60 0.57 0.57 0.57 0.57 0.57
DL-methionine 0.20 0.23 0.23 0.23 0.23 0.23 0.17 0.17 0.17 0.17 0.17
Cellulose 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00
L-Threonine 0.19 0.19 0.19 0.19 0.19 0.19 0.17 0.17 0.17 0.17 0.17
L-tryptophan 0.10 0.10 0.10 0.10 0.10 0.10 0.08 0.08 0.08 0.08 0.08
Titanium (IV) dioxide 0 0 0 0 0 0 0.10 0.10 0.10 0.10 0.10
Corn starch or ferric source 0 0 0.10 0.10 0.10 0.10 0 0.10 0.10 0.10 0.10
TOTAL 100 100 100 100 100 100 100 100 100 100 100
AMEN** MJ/kg 13.91 13.42 13.42 13.42 13.42 13.42 13.40 13.40 13.40 13.40 13.40
Crude protein % 24.00 20.00 20.00 20.00 20.00 20.00 18.00 18.00 18.00 18.00 18.00
Lysine 1.65 1.51 1.51 1.51 1.51 1.51 1.29 1.29 1.29 1.29 1.29
Methionine 0.57 0.57 0.57 0.57 0.57 0.44 0.44 0.44 0.44 0.44
Methionine/Cysteine 0.98 0.87 0.87 0.87 0.87 0.87 0.74 0.74 0.74 0.74 0.74
Tryptophan 0.37 0.30 0.30 0.30 0.30 0.30 0.25 0.25 0.25 0.25 0.25
Threonine 0.96 0.94 0.94 0.94 0.94 0.94 0.82 0.82 0.82 0.82 0.82
Valine
Arginine
Crude fibre 1.94 2.74 2.74 2.74 2.74 2.74 2.96 2.96 2.96 2.96 2.96
Crude fat 3.65 3.50 3.50 3.50 3.50 3.50 4.39 4.39 4.39 4.39 4.39
Starch
Crude ash 5.63 5.63 5.63 5.63 5.63 5.28 5.28 5.28 5.28 5.28
Calcium 0.96 0.95 0.95 0.95 0.95 0.95 0.88 0.88 0.88 0.88 0.88
Phosphorus 0.75 0.45 0.45 0.45 0.45 0.45 0.40 0.40 0.40 0.40 0.40
Digestible phosphorus 0.48
Sodium 2.20 0.24 0.24 0.24 0.24 0.24 1.76 1.76 1.76 1.76 1.76
Fe source mg/kg feed 0 0 ca. 266 266 550 550 + ca. 266 0 ca. 266 266 550 550 + ca. 266
Target added Fe mg/kg feed Only endogenous Fe 0 85 85 85 170 0 85 85 85 170

Notes:

*

Contents per kg premix: 400,000 I.U. vit. A (acetate); 120,000 I.U. vit. D3; 8,000 mg vit. E (a-tocopherol acetate); 200 mg vit. K3 (MSB); 250 mg vit. B1 (mononitrate); 420 mg vit. B2 (cryst. riboflavin); 2,500 mg niacin (niacinamide); 400 mg Vit. B6 (HCl); 2,000 μg vit. B12; 25,000 μg Biotin (commercial, feed grade); 1,000 mg pantothenic acid (Ca d-pantothenate); 100 mg folic acid (cryst. commercial feed grade); 80,000 mg choline (chloride); 5,000 mg Zn (sulphate); 6,000 mg Mn (sulphate); 1,000 mg Cu (sulphate-pentahydrate); 20 mg Se (Na-selenite); 45 mg I (Ca-iodate); 130 g Na (NaCl); 55 g Mg (sulphate).

**

Metabolisable Energy, calculated as per DLG (2013).

1

Pre-weaning creep feed with no added Fe.

2

Fe added as per commercial practice, 85 mg Fe/kg feed.

3

500 mg ferrous citrate plus 50 mg microtracer per kg feed, supplying 85 mg Fe/kg feed.

4

85 mg Fe/kg feed from ferrous citrate + 85 Fe mg/kg feed from ferrous (II) sulfate.