Studiu cu privire la performanţele de producţie şi indicii de reproducţie a mamelor producatoare de tauri de selectie locală

Abstract

The reproductive performance depending on milk productivity level at cows of Black Spotted breed of Moldavian type within the elevator of the experimental farm of the National Institute of Animal Husbandry and Veterinary Medicine was studied. Cows' population exploited in the conditions of the elevator of the scientific - experimental farm of the Institute of Animal Husbandry and Veterinary Medicine is characterized by high indices of milk productivity. Thus, the average milking during 3005 days from the first lactation was 6784, 2 kg of milk which fatness was 3, 99%, and during the lactation on average per one cow 270, 7 kg of milking fat was received. By comparing the received data with the standard purpose we can see that this group of animals exceed the requirements of the standard purpose by the quantity of obtained milk with 69, 6%. The average indices of fat content in milk of the investigated animals are higher than the standard purpose by 87, 96. The reproductive performance of high reproductive cows is problematic and depends both on productivity level and on the period of first insemination and represents on average 0, 86 per farm