Table 3.
Effect of dietary treatments on nutrient intake and digestibility in dairy cows1,2
|
Item |
Dietary treatment1 |
SEM3 |
P-value |
|||
|---|---|---|---|---|---|---|
| W0 | W10 | W20 | BP10 | |||
| Feed intake, kg/d | ||||||
| DM |
18.87 |
19.39 |
19.60 |
19.40 |
0.19 |
0.39 |
| NDF |
7.44a |
6.66b |
5.77c |
7.06ab |
0.14 |
<0.01 |
| ADF |
4.04a |
3.64b |
2.93c |
3.65b |
0.09 |
<0.01 |
| CP |
3.10b |
3.25ab |
3.33a |
3.31a |
0.03 |
<0.01 |
| Ether extract |
0.63 |
0.65 |
0.63 |
0.66 |
0.01 |
0.07 |
| Starch |
5.50c |
6.66b |
7.42a |
6.29b |
0.13 |
<0.01 |
| Apparent digestibility of nutrients, % | ||||||
| DM |
72.90 |
70.54 |
72.47 |
70.19 |
0.62 |
0.34 |
| NDF |
65.96a |
57.04bc |
52.33c |
61.82ab |
1.36 |
<0.01 |
| ADF |
63.67a |
55.63a |
45.57b |
56.72a |
1.58 |
<0.01 |
| CP |
75.38 |
72.72 |
75.39 |
71.94 |
0.62 |
0.14 |
| Ether extract |
70.74 |
63.04 |
65.22 |
65.90 |
1.30 |
0.14 |
| Starch | 89.38 | 89.29 | 89.93 | 89.35 | 0.27 | 0.84 |
1W0 = TMR containing 0% wheat; W10 = TMR containing 10% wheat; W20 = TMR containing 20% wheat; BP10 = TMR containing 20% wheat plus10% beet pulp; 2a–c Means with different superscripts in the same row differ (Tukey’s test; P<0.05); 3SEM = Standard error of the mean.