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Figure 4: Mean test day 6.5% fat corrected milk production of SDPP and LDPP treatments
during the trial period.
FCM (kg/d)
2.7
2.5
2.3
2.1
1.9
1.7
6 13 20 27 34 41 48 55
Average days in milk
78
SDPP
LDPP
Figure 5: Mean test day 6.5% fat and 5.8 % protein corrected milk production of SDPP and
LDPP treatments during the trial period.
FPCM (kg/d)
2.5
2.3
2.1
1.9
1.7
*
* Least squares means within a test day are different (P < 0.1).
6 13 20 27 34 41 48 55
Average days in milk
Average test day and total milk production and composition from each treatment, which
includes data from both the trial period on campus and post-trial period at the Spooner
Agricultural Research Station, are presented in Table 3. During this time, SDPP produced an
average of 0.2 kg/d more milk (P < 0.01) than LDPP ewes (1.68 vs. 1.48 kg/d, respectively).
While there was no significant difference in average test day milk fat or protein percentages,
SDPP ewes produced more FCM (+ 0.18 kg/d; P < 0.01), and FPCM (+ 0.17 kg/d; P < 0.01)
than LDPP ewes. After approximately 121 DIM, SDPP ewes produced more total milk (+ 26.5
SDPP
LDPP