Table 3.
Effects of organic zinc sources on the body size measurement, growth performance and incidence of diarrhea in dairy calves during the first month of life (Experiment 2).
| Item | Treatment 1 | SEM | P- Value | ||||
|---|---|---|---|---|---|---|---|
|
CON (n = 12) |
ZP (n = 12) |
ZM (n = 12) |
Treatment | Days | Treatment × days | ||
| Initial BW, kg | 39.55 | 40.55 | 38.36 | 0.72 | 0.48 | – | – |
| Final BW, kg | 54.37b | 58.46a | 58.67a | 1.23 | <0.01 | – | – |
| Initial withers height, cm | 74.33 | 77.00 | 74.42 | 0.56 | 0.09 | – | – |
| Initial body length, cm | 64.92 | 66.33 | 65.08 | 0.52 | 0.50 | – | – |
| Initial heart girth, cm | 78.83 | 81.00 | 78.83 | 0.49 | 0.11 | – | – |
| Final withers height, cm | 83.92 | 86.00 | 86.66 | 1.45 | 0.13 | – | – |
| Final body length, cm | 76.20 | 78.31 | 77.41 | 1.40 | 0.33 | – | – |
| Final heart girth, cm | 92.06 | 95.71 | 95.56 | 1.00 | 0.10 | – | – |
| Average daily gain, g/Day | 531.36b | 672.40a | 690.91a | 28.28 | <0.01 | 0.45 | 0.14 |
| Average daily feed intake, g DM/Day | 910.11 | 969.19 | 988.32 | 21.37 | 0.21 | 0.49 | 0.05 |
| F/G | 1.85 | 1.70 | 1.46 | 0.14 | 0.16 | 0.13 | 0.38 |
| Starter intake, mg DM/Day | 41.51 | 47.23 | 48.22 | 3.80 | 0.41 | <0.01 | 0.42 |
| Starter zinc intake, g DM/Day | 7.27 | 8.27 | 8.43 | 0.67 | 0.41 | <0.01 | 0.42 |
| Total zinc intake, mg/Day | 10.17b | 91.60a | 91.36a | 0.66 | <0.01 | <0.01 | 0.29 |
| Incidence of diarrhea, % | 26.49a | 14.58b | 13.99b | 0.12 | <0.01 | – | – |
a, b
Mean values in the same row with different superscripts are significantly different (P < 0.05).
1
Treatment: CON, no organic zinc supplementation; ZP group, provided 522.88 mg zinc proteinate (equivalent to 80 mg zinc/day); ZM group, provided 467.88 mg ZM per day (equivalent to 80 mg zinc/day).