Table 4.
Effect of C18 fatty acid source in the supplementary concentrate on milk production and milk composition body weight and body condition score of lactating dairy cows offered a pasture based diet (least square means ± SEM).
| Items | Treatment 1 | ||||
|---|---|---|---|---|---|
| SA | SO | LO | SEM | p-Value | |
| Milk yield (kg/d) | 19.7 b | 21.3 a | 21.0 a | 0.21 | <0.001 |
| Fat yield (kg/d) | 0.85 | 0.84 | 0.83 | 0.014 | 0.60 |
| Protein yield (kg/d) | 0.67 b | 0.73 a | 0.74 a | 0.008 | <0.001 |
| Fat + Protein yield 2 (kg/d) | 1.50 a | 1.58 b | 1.56 a,b | 0.018 | <0.05 |
| Fat % | 4.14 a | 3.89 b | 3.88 b | 0.068 | 0.008 |
| Protein % | 3.29 a | 3.42 b | 3.36 a,b | 0.032 | 0.03 |
| BCS 3 | 2.8 | 2.9 | 2.8 | 0.05 | 0.60 |
| BW 4 change (kg/d) | 0.16 | 0.16 | 0.05 | 0.09 | 0.42 |
1 SA = supplementary concentrate containing 16% stearic acid; SO = supplementary concentrate containing 16% soy oil; LO = supplementary concentrate containing 16% linseed oil; 2 Fat and protein yield (kg) = the sum of; 3 BCS = body condition score on a scale of 1 to 5 in 0.25 increments [37]; 4 BW = body weight. a,b Means within rows differ significantly.