Relation of milking temperament and milk yield in Holstein and Brown Swiss cows
2012
Gergovska, Z., Thracian University, Stara Zagora (Bulgaria) | Miteva, T., Thracian University, Stara Zagora (Bulgaria) | Angelova, T., Agricultural Institute, Stara Zagora (Bulgaria) | Yordanova, D., Agricultural Institute, Stara Zagora (Bulgaria) | Mitev, J., Thracian University, Stara Zagora (Bulgaria)
The study comprises 118 cows, of which 69 Holstein-Friesian and 49 Brown Swiss ones. The cows from both breeds are reared by the same technology – free with individual cubicles for rest and milking in milking parlour, herringbone type. To assess the temperament a 5-score system is used: 1 – very nervous and 5 – very calm cows. The average score for milking temperament in the Holstein cows is slightly higher than that of the Brown Swiss ones, 3.74 to 3.65, respectively. The cows with a nervous type of temperament, scores 1 and 2, comprise a relatively high percentage, and they are slightly more in the Holstein – 15.9% than in the Brown Swiss cows – 12.2%. The average milking yield of the nervous and very nervous cows is higher than that of the medium to very calm ones. That difference is greater in the Holstein cows – 744.8 kg compared to the Brown Swiss ones - 445.2 kg. The ranking correlation - Spearman of the breeding bulls for the dairy trait and the percentage of daughters with scores from 3 to 5 and breeding value for milking temperament score is respectively rs = - 0.21 and rs = - 0.10.
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Эту запись предоставил Institute of Agricultural Economics
