Table 3.
Milk yield, milk main constituents, and somatic cell count of milk from goats fed the control (CTRL) and cocoa bean shell (CBS) dietsa.
| Parameter | Dietary treatment | Effectsb | ||
|---|---|---|---|---|
| CTRL | CBS | DT | SD | |
| Milk yield (kg/head × day) | 1.81 | 1.70 | ns | ns |
| ECMc (kg/head × day) | 1.84 | 1.75 | ns | ns |
| Milk composition (g/kg) | ||||
| Fat | 37.37 | 37.05 | ns | ns |
| Protein | 32.04 | 33.44 | ns | ns |
| Casein | 24.76 | 26.01 | ns | ns |
| Lactose | 41.39 | 39.76 | *** | * |
| Component yield (g/head × day) | ||||
| Fat | 65.59 | 61.25 | ns | ns |
| Protein | 56.10 | 55.29 | ns | ns |
| Casein | 43.20 | 43.03 | ns | ns |
| Lactose | 74.67 | 68.08 | † | ns |
| Urea (mg/dL) | 48.01 | 38.09 | *** | *** |
| SCC (×1,000 cells/mL) | 942.49 | 1,096.37 | ns | ns |
| FEd | 0.81 | 0.81 | ns | ns |
CTRL, control diet; CBS, cocoa bean shell diet; DT, dietary treatment; SD, sampling date; ECM, energy corrected milk; SCC, somatic cell count; FE, feed efficiency.
Total number of samples analyzed for each group equal to 44 (11 goats × 4 sampling days).
Probability: ***P ≤ 0.001; *P ≤ 0.05; †0.05 < P ≤ 0.10; ns, not significant (P > 0.05). The effect of the interaction between dietary treatment and sampling date (DT × SD) was not significant; therefore, significance is only presented for the main effects.
ECM = [0.327 × milk (kg/day)] + [12.95 × milk fat (kg/day)] + [7.2 milk protein (kg/day)] (50).
Calculated as: ECM (kg)/dry matter intake (kg) (50).