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2023, № 109

UDC: 636.2.033/028
GSNTI: 68.39.15,68.39.19

Changes in the productive indicators of bull calves when a phytobiotic is introduced into the diet and microelement

The article presents experimental data on the effect of wormwood and cobalt chloride on energy metabolism and productive performance of Kazakh white-headed bulls. According to the experimental design, the bulls of the control group received the main diet, the first experimental group was introduced to the diet with wormwood herb, the second - a mixture of wormwood herb and cobalt chloride, and the third - cobalt salt. Due to the slight discrepancy in diet consumption by the bulls of the experimental groups, the gross energy also entered the body by 0.20-0.33% more compared to the control. The metabolic energy used for supermaintenance and net energy of growth was also noticeably greater in experimental group I by 1.37 (p≤0.05) and 15.0%; in III - by 3.68 (p≤0.05) and 29.88% compared to the control. Animals of experimental groups I and III by the end of the experiment were characterized by greater live weight compared to the control by 2.24% (p≤0.05) and 3.64% (p≤0.05). During the experiment, the bulls that received wormwood grass and pure cobalt chloride in their diet grew more intensively and in this indicator they outperformed their peers from the control by 26.72 and 33.40%. A similar pattern was observed in terms of metabolic body weight, so control animals were inferior in this indicator to animals from the experimental groups by 0.23-1.22%. An assessment of expected dry matter intake showed that bulls from these groups had better feed efficiency (0.572 kg and 0.426 kg) based on the difference between actual and expected dry matter intake. Thus, the inclusion of wormwood and pure cobalt chloride in the diet has a positive effect on the nature of the energy use of the diet, which contributes to increased growth of Kazakh white-headed bulls by 2.24 and 3.34% relative to the control.
Keywords: Feeding bulls, energy, productivity, live weight, wormwood herb, cobalt chloride.
DOI: 10.21515/1999-1703-109-193-198

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Authors:

1. Ryazanov Vitaly Alexandrovich, PhD in Agriculture, FSBSI “Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences”.
2. Nurzhanov Baer Serekpaevich, DSc in Agriculture, FSBSI “Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences”.
3. Duskaev Galimzhan Kalikhanovich, DSc in Biology, professor of the RAS, FSBSI “Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences”.
   

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   Исследование выполнено при финансовой поддержки Российского научного фонда проект №21-76-10014