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FORAGE AND NUTRITION Guide 2017
21
Table 2: Genetic comparison of the high milk PTA and low milk PTA genetic groups at Lyons (2017).
EBI ()
Milk ()
Fert () Calv () Beef ()
Maint
()
Health
()
Mgt ()
High
milk
155
64
53
37
-7.4
4.8
1.1
2.4
Low
milk
154
51
67
36
-8.9
6.0
2.0
0.8
Average
155
58
60
37
-8.2
5.4
1.6
1.6
Milk
(kg)
Fat (kg)
Prot
(kg)
Fat (%)
Prot (%)
Calve
Int
(days)
Surv (%)
High
milk
250.0
14.3
10.9
0.1
0.0
-2.4
1.9
Low
milk
43.9
10.9
6.6
0.2
0.1
-3.4
1.9
Average
146.8
12.6
8.8
0.1
0.1
-2.9
2.0
Table 3: Feed budget.
Days in
milk
0-20
20-
60
60-
120
120-
180
180-
240
240-
270
270-
305
306-
365
(dry)*
Total annual
DMI (t/DM)
Milk yield
31
34
32
27
22
19
15
-
7500
Silage
DM
12
0
0
0
0
6
10
11
1.5
Grass
DM
0
15
16
15
13
6
0
-
3.6
Concentrate
8
8
7
3.5
2.5
2.5
6
-
1.3
Table 4: Financial assumptions.
Parameter
SR cows/ha milking platform
3.40
SR overall LU/ha
2.25
Milk solids (kg/cow)
625
Milk solids (kg/ha)
2,130
Concentrates (t/DM/cow)
1.30
Grazed grass (t/DM/cow)
3.70
Grass Silage (t/DM/cow)
1.50
Milk output (/cow)
2,597
Milk output (/ha)
5847
Gross margin (/cow)
1,675
Gross margin (/ha)
3,771
Net margin (/cow)
955
Net margin (/ha)
2,150
Breakeven milk price (/kg/MS)
2.62
*Milk price 4.14/kg/MS; Conc. price 300t/DM.
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00877 Ireland Ecosyl Ad Forage Guide 185x135mm L_v1.indd 1
03/03/2017 16:50