PRODUCTIVE LONGEVITY OF UKRAINIAN BLACK-AND-WHITE DAIRY BREEDS OF DIFFERENT EXTERIOR AND PRODUCTION TYPES
Journal Title: Подільський вісник : сільське господарство, техніка, економіка - Year 2018, Vol 1, Issue 28
Abstract
An exterior is an important selection feature that indicates the ability of animals to manifest life-long high productivity, birth rate, viability and resistance to illness and unfavorable factors of environmental. This indicator is mandatory in the selection of animals in the complex signs. The aim of the research was to study the productive longevity of Ukrainian Black-and-White dairy breed depending on their exterior and production types. The study is based on Ukrainian black and spotted dairy breed cows in “Prohress” limited liability company (n = 185) in Kirovohrad region and "Kyiv" agricultural company (n = 717) in Kyiv region. To evaluate the exterior and general development of the animals materials of zootechnical accounting were used. Exsterior cow type was determined with the help of Zamiatyn index, and industrial type was determined according to Kazarovets methodology. It was found that experimental heifers were characterized by proportional development of the trunk (83.6 cm) and extensive breast (chest circumference with shoulder blades - 194.7 cm, breast width - 49.2 cm). Animals were quite high (height at the withers - 134.9 cm) with oblique body length 154.8 cm. Among the studied livestock, the largest number of animals belonged to the leptospromal (57.5%) and to the near-dairy type (61.0%). Leptospromic and intermediate exterior types and dairy and near-dairy production types were characterized by highest lifetime productivity and the duration of economic use. There were found weak and medium by the strength of connections between the measurement and the indices of the body structure of cows and the indicators of their productive longevity, which in most cases were negative.
Authors and Affiliations
N. P. Mazur
Keywords
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