Table 15.
Effect of increasing inclusion levels of a mixture of hatchery by-products (MIX) as a replacement of fish meal (FM) in diets on the tibia characteristics of broiler chickens1)
| Items | Inclusion levels of MIX2) (%) | SEM | p-value3) | ||||||
|---|---|---|---|---|---|---|---|---|---|
|
|
|
||||||||
| 0.00 | 1.25 | 2.50 | 3.75 | 5.00 | T | L | Q | ||
| Tibia ash (%) | 52.7 | 53.6 | 52.3 | 53.7 | 52.4 | 0.52 | 0.18 | 0.81 | 0.41 |
| Tibia calcium (%) | 41.4 | 39.7 | 42.8 | 40.6 | 42.0 | 2.90 | 0.96 | 0.83 | 0.94 |
| Tibia phosphorus (%) | 16.1 | 15.2 | 15.6 | 15.0 | 15.0 | 1.01 | 0.92 | 0.45 | 0.82 |
| Tibia breaking strength (kg) | 35.3 | 40.4 | 39.0 | 37.8 | 42.8 | 2.47 | 0.29 | 0.12 | 0.98 |
SEM, standard error of the mean.
1)
Data are least squares means of 8 observations per treatment.
2)
MIX was included at replacing levels of 0%, 25%, 50%, 75%, or 100% with 5.0% FM in the basal diet.
3)
T, overall effects of treatments; L, linear effects of increasing replacement levels of MIX in diets; Q, quadratic effects of increasing replacement levels of MIX in diets.