|
Parameter |
No. of studies |
Mean |
Median |
Minimum |
Maximum |
|
|
Semi-arid zone |
||||||
|
|
Calf mortality risk (%) |
37 |
20.7 |
21.0 |
4.8 |
40.0 |
|
|
Female replacement mortality risk (%) |
15 |
8.1 |
9.0 |
2.0 |
15.0 |
|
|
Male replacement mortality risk (%) |
13 |
8.2 |
7.8 |
3.2 |
15.0 |
|
|
Cow mortality risk (%) |
24 |
6.2 |
6.5 |
1.0 |
12.9 |
|
|
Age at first calving (months) |
28 |
47.4 |
48.5 |
34.0 |
60.0 |
|
|
Calving rate (%) |
42 |
58.2 |
58.0 |
28.0 |
89.9 |
|
|
Milk offtake per lactation (kg) |
24 |
282.0 |
252.0 |
112.0 |
508.0 |
|
|
Offtake rate (%) |
10 |
10.2 |
9.5 |
3.2 |
20.0 |
|
|
Weight of mature cow (kg) |
15 |
239.0 |
244.0 |
152.0 |
300.0 |
|
|
Weight of mature bull (kg) |
16 |
326.0 |
322.0 |
241.0 |
425.0 |
|
Subhumid zone |
||||||
|
|
Calf mortality risk (%) |
44 |
22.3 |
21.9 |
6.0 |
46.9 |
|
|
Female replacement mortality risk (%) |
10 |
6.0 |
5.2 |
2.3 |
10.4 |
|
|
Male replacement mortality risk (%) |
10 |
8.4 |
10.2 |
2.8 |
11.4 |
|
|
Cow mortality risk (%) |
23 |
6.4 |
5.0 |
2.6 |
15.0 |
|
|
Age at first calving (months) |
18 |
48.4 |
46.6 |
33.4 |
62.4 |
|
|
Calving rate (%) |
48 |
60.0 |
61.0 |
46.0 |
80.0 |
|
|
Milk offtake per lactation (kg) |
22 |
218.0 |
206.0 |
60.0 |
416.0 |
|
|
Offtake rate (%) |
14 |
9.0 |
7.7 |
3.8 |
16.4 |
|
|
Weight of mature cow (kg) |
22 |
256.0 |
250.0 |
218.0 |
357.0 |
|
|
Weight of mature bull (kg) |
8 |
324.0 |
318.0 |
263.0 |
400.0 |
|
Humid zone |
||||||
|
|
Calf mortality risk (%) |
19 |
21.1 |
17.0 |
6.6 |
46.2 |
|
|
Female replacement mortality risk (%) |
7 |
8.0 |
7.0 |
5.3 |
16.0 |
|
|
Male replacement mortality risk (%) |
7 |
8.5 |
7.0 |
3.3 |
16.0 |
|
|
Cow mortality risk (%) |
11 |
4.2 |
3.4 |
2.0 |
7.5 |
|
|
Age at first calving (months) |
1 |
39.4 |
39.4 |
39.4 |
39.4 |
|
|
Calving rate (%) |
10 |
57.4 |
59.9 |
40.0 |
70.0 |
|
|
Milk offtake per lactation (kg) |
5 |
233.0 |
250.0 |
84.0 |
318.0 |
|
|
Offtake rate (%) |
3 |
6.9 |
7.5 |
1.2 |
12.0 |
|
|
Weight of mature cow (kg) |
4 |
205.0 |
195.0 |
180.0 |
250.0 |
|
|
Weight of mature bull (kg) |
n.r.1 |
n.r. |
n.r. |
n.r. |
n.r. |
|
Highland zone |
||||||
|
|
Calf mortality risk (%) |
7 |
20.8 |
21.7 |
7.0 |
27.6 |
|
|
Female replacement mortality risk (%) |
2 |
8.5 |
8.5 |
5.0 |
12.0 |
|
|
Male replacement mortality risk (%) |
2 |
14.0 |
14.0 |
8.0 |
20.0 |
|
|
Cow mortality risk (%) |
4 |
4.0 |
3.8 |
3.4 |
5.0 |
|
|
Age at first calving (months) |
3 |
52.3 |
52.8 |
43.2 |
61.0 |
|
|
Calving rate (%) |
6 |
44.1 |
43.6 |
38.5 |
52.2 |
|
|
Milk offtake per lactation (kg) |
3 |
313.0 |
292.0 |
238.0 |
412.0 |
|
|
Offtake rate (%) |
3 |
9.9 |
9.3 |
9.2 |
11.3 |
|
|
Weight of mature cow (kg) |
2 |
200.0 |
200.0 |
200.0 |
200.0 |
|
|
Weight of mature bull (kg) |
2 |
274.0 |
274.0 |
273.0 |
275.0 |
1 n.r. = no reference
