Table 2.
Effects of dietary hydrolyzed yeast on egg production and feed intake in aged laying hens1
| Hydrolyzed yeast (%) | SEM | P values |
0 | 0.1 | 0.2 | Linear | Quadr. | ANOVA |
Egg production (%) | | | | | | | |
1∼4 wk | 79.5 | 82.8 | 79.8 | 0.02 | 0.918 | 0.267 | 0.527 |
5∼8 wk | 75.7b | 83.2a | 82.3a | 0.02 | 0.016 | 0.069 | 0.015 |
Total period | 77.3 | 83.0 | 81.3 | 0.02 | 0.152 | 0.131 | 0.124 |
Egg weight (g/egg) | | | | | | | |
1∼4 wk | 63.0 | 63.2 | 62.5 | 0.57 | 0.515 | 0.542 | 0.667 |
5∼8 wk | 63.9 | 63.3 | 62.6 | 0.52 | 0.102 | 0.949 | 0.250 |
Total period | 63.5 | 63.2 | 62.5 | 0.51 | 0.217 | 0.715 | 0.428 |
Egg mass | | | | | | | |
1∼4 wk | 50.0 | 48.5 | 49.1 | 1.56 | 0.976 | 0.259 | 0.518 |
5∼8 wk | 52.2b | 52.7a | 52.5ab | 1.15 | 0.066 | 0.077 | 0.047 |
Total period | 50.0 | 51.7 | 50.9 | 1.25 | 0.342 | 0.121 | 0.194 |
Feed intake (g/bird/d) | | | | | | | |
1∼4 wk | 119.0 | 118.2 | 117.6 | 1.26 | 0.429 | 0.937 | 0.721 |
5∼8 wk | 111.1b | 118.4a | 117.1a | 1.28 | 0.005 | 0.015 | 0.002 |
Total period | 115.1 | 118.4 | 117.4 | 1.22 | 0.202 | 0.176 | 0.184 |
Data are least square of mean of 6 replicate with 2 cages with 5 birds per cage.
Mean values within a row with different superscripts differ at P<0.05.