Analysis of longterm trends in the performance of dairy cows on low-input mountain farms
2010
Frelich, J.,Jihoceska Univ., Ceske Budejovice (Czech Republic). Zemedelska Fakulta | Slachta, M.,Jihoceska Univ., Ceske Budejovice (Czech Republic). Zemedelska Fakulta | Kobes, M.,Jihoceska Univ., Ceske Budejovice (Czech Republic). Zemedelska Fakulta
The productive and reproductive performance of dairy cows was examined in thirty-four low-input farms in the Sumava Mts. (Czech Republic) between 2000 and 2007. Milk production increased by an average of 986 kg and 948 kg per lactation in Holstein (H) and Czech Fleckvieh (CF) cows (P less than 0.001), respectively. The mean number of lactations decreased from 2.7 to 2.5 in H and from 3.4 to 3.0 in CF cows (P less than 0.001). The mean number of lactations decreased also in the culled cows - from 3.2 to 2.9 in H and from 4.3 to 3.5 in CF cows (P less than 0.001). A higher milk yield was accompanied by a deterioration in reproductive performance. Between the periods 2000-2003 and 2004-2007 the number of days open lengthened by an average of 6 and 4 days (P less than 0.01) and the calving period by an average of 11 and 6 days (P less than 0.001) in H and CF cows, respectively. The results indicated an increased replacement of cows in the herds examined as a coincidental feature of the steadily rising milk performance. This may have a negative impact on the rentability of low-input mountain dairy farming in the region.
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