Table 5.
Effect of YEFECAP as a protein source in concentrate mixtures on milk production, milk composition and economic return
|
Items |
Treatments |
SEM |
Contrasts |
|||||
|---|---|---|---|---|---|---|---|---|
| T1 | T2 | T3 | T4 | L | Q | C | ||
| Production |
|
|
|
|
|
|
|
|
| Milk yield, kg/d |
13.5 |
14.0 |
14.5 |
15.0 |
0.27 |
** |
ns |
ns |
| 3.5% FCM1, kg/d |
13.7 |
14.7 |
15.9 |
17.1 |
0.49 |
** |
ns |
ns |
| Milk composition, % |
|
|
|
|
|
|
|
|
| Protein |
4.0 |
4.1 |
4.5 |
4.7 |
0.17 |
** |
ns |
ns |
| Fat |
3.2 |
3.3 |
3.4 |
3.5 |
0.06 |
** |
ns |
ns |
| Lactose |
4.5 |
4.6 |
4.6 |
4.7 |
0.07 |
ns |
ns |
ns |
| Solids-not-fat |
8.2 |
8.4 |
8.4 |
8.5 |
0.29 |
ns |
ns |
ns |
| Total solids |
12.3 |
12.7 |
12.8 |
13.0 |
0.78 |
ns |
ns |
ns |
| Milk urea N, mg/dL |
14.8 |
12.5 |
12.3 |
12.0 |
0.58 |
* |
ns |
ns |
| Economic return, $US/hd/d |
|
|
|
|
|
|
|
|
| Feed cost |
2.5 |
2.6 |
2.6 |
2.7 |
0.14 |
ns |
ns |
ns |
| Milk sale |
9.5 |
9.8 |
10.2 |
10.5 |
0.19 |
** |
ns |
ns |
| Profit | 7.0 | 7.2 | 7.6 | 7.8 | 0.16 | ** | ns | ns |
Source: Wanapat et al. [27].
ns, non-significance.
Level of replacement of soybean meal (SBM) by YEFECAP: at 0% (T1), 33% (T2), 67% (T3), 100% (T4).
Feed cost: concentrate T1, 0.38 $US/kg, T2, 0.37 $US/kg, T3, 0.37 $US/kg, T4, 0.35 $US/kg, ULRS, 0.07 $US/kg, Milk price, 0.7 $US/kg.
L, linear, Q, quadratic, C, cubic, SEM, standard error of the means; * P<0.05; ** P<0.01.