Interaction between dairy cow physiology and milking technology
نویسندگان
چکیده
Anatomical and functional characteristics of the teat are supposed to have considerableinfluence on milk flow performance. In the present study various teat and milkingcharacteristics in 148 quarters of 38 cows were analyzed via 3 different approaches. Teatcanal length, teat wall thickness and teat diameter were measured by ultrasound. In addition,the vacuum needed to open the teat canal (VO) was determined and milk flow profiles weremeasured in each quarter separately.Rear teats were shorther and thicker than front teats, whereas teat canal length and teat wallthickness did not differ for quarter position. Milk yield and peak flow rate (PFR) were higherin rear than in front quarters. Teat canal length and VO were negatively correlated with PFRand average flow rate (AFR), but no correlations were observed between milkability traits andexternally measurable teat characteristics like teat length or teat diameter.In conclusion, individual milkability at an udder level is a complex characteristic that isdetermined by the milkability at a quarter level and the distribution of quarter milk yields. Theanatomical and functional characteristics of single teats can partly explain the milk flowcharacteristics of individual quarters.
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