Dairy Sheep Symposium - the Department of Animal Sciences ...

Table 1. Least squares means ± SEM for lactation traits and serum progesterone for the
treatment x period combinations.
Trait
Milk yield, kg/d
Milk flow rate, ml/min
Milk fat, %
Milk fat, g/d
Milk protein, %
Milk protein, g/d
Serum progesterone, ng/ml
corpora lutea.
853. 185.
Treatment 2
Experimental period 1
pre-treatment treatment post-treatment
CLY 1.42 ± 0.03 b
CLN 1.47 ± 0.03 b
CLY 206 ± 11 b
CLN 219 ± 11 b
CLY 6.46 ± 0.12 a
CLN 5.75 ± 0.12 c
CLY 87.0 ± 2.6 ab
CLN 81.3 ± 2.6 b
CLY 5.69 ± 0.06 a
CLN 5.53 ± 0.06 ab
CLY 79.6 ± 1.7 ab
CLN 77.7 ± 1.7 bc
CLY 2.3 ± 0.2 c
CLN 2.0 ± 0.2 c
1.56 ± 0.01 a
1.44 ± 0.01 b
244 ± 6 a
208 ± 6 b
6.14 ± 0.06 b
5.73 ± 0.06 c
92.2 ± 1.3 a
81.1 ± 1.3 b
5.44 ± 0.03 b
5.53 ± 0.03 ab
83.7 ± 0.8 a
77.5 ± 0.8 bc
5.3 ± 0.2 a
2.9 ± 0.2 b
a,b,c,d Within a trait, means with different superscripts differ (P < 0.05).
1 Pre-treatment: d 0 to 5; treatment: d 6 to 18; and post-treatment: d 19 to 25.
2 Treatment during d 6 to 18: CLY = ewes with corpora lutea; CLN = ewes without
1.35 ± 0.02 c
1.25 ± 0.02 d
212 ± 9 b
169 ± 9 c
6.68 ± 0.16 a
6.33 ± 0.16 ab
82.9 ± 3.7 ab
70.2 ± 3.7 c
5.60 ± 0.08 ab
5.63 ± 0.08 ab
70.8 ± 2.4 c
60.9 ± 2.4 d
0.7 ± 0.2 d
0.8 ± 0.2 d