Changes in indicators of semen productivity of bulls in the conditions of Uzbekistan depending on age

Tashkent State Agrarian University, 2, University street, Tashkent, 100140, Uzbekistan

^* Corresponding author: sherallayar@gmail.com

Abstract

The article presents a comprehensive exploration of scientific and practical research focused on assessing alterations in both quantitative and qualitative aspects of sperm production in imported breeding bulls used as sperm donors, in comparison to the local Bushuev breed raised in Uzbekistan. The investigation spans from the age of 3 years, signifying the attainment of full physiological maturation in these bulls. Central to the research are the results detailing shifts in key sperm production indicators. The article goes beyond quantitative measures and delves into various facets of sperm productivity. Alongside these findings, the article addresses pertinent factors related to breed-specific traits. These encompass aspects such as the proportion of sperm culling, the yield of sperm doses, the duration of the bulls’ tenure in the primary herd, and other relevant considerations. By conducting this comprehensive study, the article provides a deeper understanding of how sperm production evolves in both imported breeding bulls and the native Bushuev breed after reaching full physiological maturity at the age of 3 years. The analysis of quantitative and qualitative aspects, coupled with insights into breed-specific characteristics, contributes to informed decision-making in the realm of cattle breeding and management practices. Ultimately, this research enhances our understanding of reproductive efficiency and guides efforts to optimize breeding programs for sustainable livestock production.