UDC 636.2.087.7
DOI: 10.36871/vet.zoo.bio.202401012
Authors
Kairulla K. Akhazhanov,
Azat M. Sadykkalliev,
Scientific Research Institute of Agro-Innovation and Biotechnology,
Toraigyrov University, Pavlodar, Kazakhstan
Toktar K. Bekseitov,
Erzhan K. Akhazhanov,
NJSC «Toraigyrov University», Pavlodar, Kazakhstan
Maxim V. Syrovatsky,
Moscow State Academy of Veterinary Medicine and Biotechnology – MVA by K. I. Skryabin”, Moscow, Russia
Sergey V. Beketov,
Vavilov Institute of General Genetics, Russian Academy of Sciences,
Moscow, Russia
Abstract
In a study conducted on replacement heifers (111–116 days), nitrogen balance was studied when different whole milk feeding schemes were used at their early age. According to the results of the experiment, it was found that that a decrease in the milk norm established on the farm of 375 liters did not subsequently lead to significant changes in the nitrogen balance and the dynamics of growth and development of replacement heifers. At the same time, the greatest efficiency of using nitrogen taken with feed was noted in the experimental group of heifers that received 345 liters of whole milk. With an additional reduction in milk drinking rates to 285 liters, an increase in the average daily feed consumption was detected in the experimental animals.
Keywords
replacement heifers, milk feeding schemes, mixed feed, nitrogen balance, live weight dynamics, total protein, palatability.
