INFLUENCE OF SERVICING BULLS ON MORPHOLOGICAL AND FUNCTIONAL PROPERTIES OF UDDER AND DAIRY PRODUCTIVITY OF KHOLMOGORSKAYA COWS
Abstract
The article revels the research results on exploring the influence of Holstein servicing bulls on morphological and functional udder parameters and milk productivity of Kholmogorskaya first-calf cows. The researchers used the method of analogues and arranged 6 groups of heifers from the moment of birth, taking into account the genotype, age and live weight. The authors observed the best measurements of udder and dugs in 1,3 and 5 groups of cows, exactly the daughters of Neapol 5791 bulls, Versal 79552467 and Lazurit 61968904. These cows had longer and wider udder with a depth of the forequarters equal to 19.3-19.6 cm, girth - 8.0-8.2 cm, high rate of breast (2.13-2.38 kg / min) and the greatest milk yields for 305 days of lactation (5131.7-5548.2 kg). First-calf cows of the 5thgroup dominated among the other groups. These cows were bred from Lazurit 61968904 bull and produced milk on 474.1 kg or 9.3 % more than average parameter among the groups (P<0.05). Higher milk yields were observed together with lower part of fat in milk 3.74%; this parameter is lower than the average one on 0.15%. The part of protein in milk (3.05%) was higher than the average parameter on 0.03% (P<0.05). The data obtained on morphological and functional parameters of udder and milk productivity of cows for the first lactation highlight that further improvement of Kholmogorskiy cattle requires involvement of Neapol 5791 bulls, Versal 79552467, Lazurit 61968904 that belong to three lines: UES Ideala 933122, Reflection of Sovering 198998 and Montvik Chiftein 95679.
About the Author
I. M. Khaertdinov
Udmurtian Research Institute of Agriculture
Russian Federation
Candidate of Agriculture, Senior Research Fellow
Russian Federation
Candidate of Agriculture, Senior Research Fellow
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Review
For citations:
Khaertdinov I.M. INFLUENCE OF SERVICING BULLS ON MORPHOLOGICAL AND FUNCTIONAL PROPERTIES OF UDDER AND DAIRY PRODUCTIVITY OF KHOLMOGORSKAYA COWS. Bulletin of NSAU (Novosibirsk State Agrarian University). 2018;(1):107-112. (In Russ.)
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