Treat* | Day 0 | Day 7 | Day 14 | Day 21 | Day 28 |
---|---|---|---|---|---|
Body weight (g) | |||||
High Fe | 42.5a ± 2.1 | 107.6a ± 3.9 | 214.6a ± 5.8 | 427.8a ± 16.8 | 684.3a ± 21.9 |
Low Fe | 42.9a ± 2.6 | 103.9a ± 4.3 | 204.1a ± 9.1 | 398.7a ± 18.8 | 599.9b ± 26.1 |
Feed intake (kg/d)2 | |||||
High Fe | - | 0.02a ± 0.005 | 0.07a ± 0.008 | 0.07a ± 0.01 | 0.08a ± 0.01 |
Low Fe | - | 0.02a ± 0.006 | 0.06a ± 0.007 | 0.07a ± 0.009 | 0.08a ± 0.01 |
Fe intake (mg) 3 | |||||
High Fe | - | 9.6a ± 0.7 | 33.8a ± 1.5 | 58.7a ± 4.9 | 87.6a ± 6.5 |
Low Fe | - | 7.0b ± 0.5 | 23.3b ± 1.8 | 44.4b ± 3.8 | 65.6b ± 4.9 |
Hemoglobin (g/L) | |||||
High Fe | 90.50a ± 8.3 | 85.85a ± 4.0 | 79.60a ± 4.5 | 80.14a ± 6.5 | 75.50a ± 3.1 |
Low Fe | 90.70a ± 8.7 | 78.40a ± 4.7 | 76.10a ± 3.7 | 78.40a ± 2.3 | 73.71a ± 2.3 |
Total body Hb Fe content (mg)4 | |||||
High Fe | 1.08a ± 0.06 | 2.62a ± 0.18 | 4.83a ± 0.31 | 9.77a ± 0.58 | 15.04a ± 0.65 |
Low Fe | 1.11a ± 0.08 | 2.36a ± 0.24 | 4.58a ± 0.29 | 8.50b ± 0.35 | 12.58b ± 1.03 |
Hemoglobin maintenance efficiency (HME, %)5 | |||||
High Fe | - | 16.0a ± 1.9 | 11.0a ± 0.9 | 14.7a ± 1.0 | 15.9a ± 0.7 |
Low Fe | - | 18.5a ± 3.8 | 15.1b ± 1.2 | 16.7b ± 0.7 | 17.6a ± 1.3 |