Table 5.
The effects of split feeding on egg quality in laying hens1.
| Items | CON | TRT1 | TRT2 | SEM2 | P-value3 |
|---|---|---|---|---|---|
| Week 4 | |||||
| Egg Shell color | 9.3 | 9.2 | 9.2 | 0.3 | 0.949 |
| Haugh Unit | 81.5 | 81.3 | 81.0 | 0.7 | 0.858 |
| Egg weight, g | 64.1 | 64.3 | 64.1 | 0.3 | 0.833 |
| Yolk color | 7.4 | 7.5 | 7.4 | 0.4 | 0.972 |
| Albumen height, mm | 7.3 | 7.1 | 7.0 | 0.3 | 0.875 |
| Eggshell Strength, kg/cm2 | 3.96 | 4.00 | 3.84 | 0.10 | 0.530 |
| Eggshell Thickness, mm-2 | 37.5 | 37.9 | 36.4 | 1.2 | 0.651 |
| Week 8 | |||||
| Egg Shell color | 9.0 | 9.0 | 9.0 | 0.4 | 0.990 |
| Haugh Unit | 81.0 | 80.7 | 80.4 | 0.7 | 0.819 |
| Egg weight, g | 64.3 | 64.6 | 64.2 | 0.8 | 0.960 |
| Yolk color | 7.3 | 7.3 | 7.2 | 0.3 | 0.977 |
| Albumen height, mm | 7.3 | 7.0 | 6.9 | 0.4 | 0.669 |
| Eggshell Strength, kg/cm2 | 3.83ab | 3.94a | 3.64b | 0.08 | 0.046 |
| Eggshell Thickness, mm-2 | 36.8ab | 37.4a | 35.3b | 0.6 | 0.047 |
| Week 12 | |||||
| Egg Shell color | 8.8 | 8.9 | 8.8 | 0.5 | 0.990 |
| Haugh Unit | 80.7 | 80.3 | 79.9 | 1.0 | 0.844 |
| Egg weight, g | 64.5 | 65.0 | 64.3 | 1.2 | 0.891 |
| Yolk color | 7.1 | 7.1 | 7.1 | 0.4 | 0.997 |
| Albumen height, mm | 7.2 | 7.0 | 6.8 | 0.4 | 0.789 |
| Eggshell Strength, kg/cm2 | 3.58b | 3.86a | 3.32b | 0.09 | 0.001 |
| Eggshell Thickness, mm-2 | 35.2b | 37.0a | 33.6b | 0.6 | 0.001 |
1
Abbreviation: CON, Basal diet (one diet, conventional feeding with coarse limestone); TRT1, S100 (same nutrition density of day total consumption with control group, but different ratio of nutrients and particle size of limestone with split feeding; morning time fine limestone / afternoon time coarse limestone); TRT2, S95 (95 % nutrient density of ME and SID amino acid, 90 % density in available phosphorus and calcium of day- total consumption compared with basal diet; morning time fine limestone / afternoon time coarse limestone).
2
Standard error of means.
a,b,3
Means in the same row with different superscript differ significantly (P < 0.05).