Exterior features of holstein-kholmogory cattle offspring

The main goal of the breeding work is the creation of animals suitable for intensive exploitation on mechanized farms and complexes. For livestock specialist, the study of the constitution makes it possible to understand how animals develop, to determine their advantages and disadvantages. Studying of constitutional features helps to predict their economic and breeding values. As a result of our research, a database about the exterior of Holstein-Kholmogory cattle offspring was collected. The obtained figures allow doing a conclusion that the age-related changes in the exterior of offspring in the studied farm occur in accordance with general biological regularities. It was found that the most intensive changes in the body during the period of growth of heifers from 6 to 24 months of age occur in the chest (girth, width and depth of the chest), in the slanting length of the trunk and in the pelvic bones (width between hooks, thurls and pin bones), width of the loin. On average, the measurement - the chest girth to the age of 24 months increased by 47%, the depth of the chest - by 39%, the width of the chest - by 51%, the height measurements increased approximately by 23%, the slanting length of the trunk - by 37%, the width between hooks, thurls, pin bones, width of the loin - by 35-89%, from the corresponding measurements of the calves at 6 months of age. The study of stature indices changes shows a stable decrease in long-legs, pelvic-chest, wide-forehead index. The overgrowth index almost does not change. The meat index first increases, but then decreases to 24 months, which is probably explained by the physiological processes associated with the need to supply nutrients to the fetus. The indices of stretch, blockiness, massiveness and chest are actively growing.

cattle, exterior of offspring, age changes, constitution, linear measurements, stature indices

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