The influence of productivity indicators on the culling of dairy cows in the sharply continental climate of Kazakhstan
O impacto dos indicadores de produtividade no abate de vacas leiteiras no clima acentuadamente continental do Cazaquistão
Uskenov R. Issabekova S. Bostanova S. Shaikenova K. Shamshidin A. Kharzhau A.
2023Instituto Internacional de Ecologia
Brazilian Journal of Biology
2023#83
This article presents the results of the culling of cows of the Simmental and Holstein breeds in the Republic of Kazakhstan. The purpose of the research was to study the actual number of culled cows of dairy productivity in the farms of the Republic of Kazakhstan to determine its norm. The object of research were cows of Simmental (18,462 heads) and Holstein (17,862 heads) breeds in various regions of the republic. The research was carried out according to generally accepted zootechnical methods using statistical data processing using RStudio. The results of the studies showed that the percentage of culling increases in cows of the Simmental and Holstein breeds and amounts to 19.7 and 22.9%, respectively. The analysis of the retirement of full-aged cows of the Simmental breed showed that the main causes are hoof diseases (up to 26%), low reproductive function (up to 21%), low productivity (up to 18%). Holstein cows had an increase in disposals in all categories except for disposals for various reasons, for problems with reproduction, the disposal is up to 21%. The determination of the relationship between productivity and retirement in the Simmental breed cows showed that with age and increased lactation, the proportion of retired cows also increases, in the Holstein breed, with increased productivity, the percentage of culled animals also increases.
culling , hoof diseases , lack of exterior , longevity , milk productivity , reproduction , udder diseases
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Saken Seifullin Kazakh Agrotechnical University, Department of Technology and Processing of Livestock Production, Astana, Kazakhstan
West Kazakhstan Agrarian and Technical University named after Zhangir Khan, Uralsk, Kazakhstan
Saken Seifullin Kazakh Agrotechnical University
West Kazakhstan Agrarian and Technical University named after Zhangir Khan
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