Eksterjera pazīmju ietekme uz Latvijas brūnās un Latvijas zilās šķirnes govju piena produktivitāti | The effect of body conformation traits on Latvian Brown and Latvian Blue dairy cow milk productivity
2021
Cielava, L., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture. Inst. of Animal Sciences | Jonkus, D., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture. Inst. of Animal Sciences
The body conformation is one of the most important factors that directly influence the dairy cow milk productivity not only during the first, but also during later lactations. Some of the less analysed traits in dairy farming are as follows: additional and thick teats, uneven udder base line, heel depth and risen tail base. The aim of our study was to determine to what extent different body conformation imperfections influence the milk productivity in the first and later lactations. The information about 153 Latvian Brown (LBSDz) and 352 Latvian Blue (LZ) breed cows was included in the data basis. The following information was collected from the Latvian Agricultural data centre: dairy cow milk productivity and quality in the 1st–3rd lactations, the body conformation trait linear evaluation score results as well as the information about the exterior imperfections. The average milk productivity in the 1st lactation was 4710.4±102.15 kg energy corrected milk (ECM) from LBSDz and 4672.6±68.94 kg ECM from LZ breed cows. In total exterior imperfections were observed in 35% of all cases (178 animals), furthermore, half of the animals had more than 1 exterior imperfection. The most common observed trait was “additional teat” (57 cases), “uneven udder base line” (42 cases), “risen tail base” (38 cases) and weak and deep heals (20 cases). The significantly higher (p is less than 0.05) milk productivity was observed in the group where cows had exterior imperfections such as “additional teat” and “uneven udder base line”.
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