THE PRODUCTIVITY OF COWS AND AVAILABILITY OF MICROELEMENTS AT DIFFERENT LEVELS OF DRY SUBSTANCE AND PROTEIN IN THE RATION

  • A. Tsvigun State Agrarian and Engineering University in Podilya, Kamianets-Podilskyi
  • O. Tsvigun State Agrarian and Engineering University in Podilya, Kamianets-Podilskyi
Keywords: dry substance, protein, visible availability, ration, feeding, Iron, Copper, Zinc, Manganese, Cobalt, Iodine, Selenium

Abstract

The article shows the results of scientific and economic experiment conducted at Ukrainian black and white and red and white cows during different lactation phases at different levels of protein supply. Noting the role of protein zootechnics allocates its impact on productivity of 20-25%. While the energy is given to 65%. In practice, it is clear that protein is the limiting factor as the rations are usually provided with energy, and inclusion of protein is always accompanied by higher yields. The aim of the study is to investigate the microelements availability of Iron, Copper, Zinc, Manganese, Cobalt, Iodine and Selenium in I, II and III Phases of cows’ lactation and productivity at different levels of dry substance and protein in their ration. The study was carried out at the farm in Velyka Bagachka village, Poltava region at Ukrainian black and white and red and white cows. The ration in the first control group included 15.4 kg of dry substance and 2010 g of crude protein. The ration in the second experimental group includes accordingly 17.0 kg and 2214 g, and in the third - 18.6 kg and 2423 g. It was found that the highest milk yield was in the third group of cows that received additional 20% of dry substance and protein (20.3 kg) into the ration, slightly lower it was in the second group of cows that received additional 10% of dry substance and protein (18.9 kg) compared with the control group (17.4 kg). Adding to the ration 10% of dry substance and protein the availability of Iron increased by 8.8%, Cobalt by 1.7%, Iodine by 4.3%, Selenium by 10.6%, and conversely it was decreased in Copper, Zinc and Manganese accordingly by 1.2%, 1.1% and 1.6% (R≥0,95). By adding into the ration additional 20% of dry substance and protein the availability of Iron increases by 1.0%, Zinc – by 1.7%, Cobalt and Iodine – by 1.2%, Selenium – by 1.8%, and the availability of Zinc and Manganese decreases accordingly by 0.5% and 0.3% (R≤0,95).

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Author Biographies

A. Tsvigun, State Agrarian and Engineering University in Podilya, Kamianets-Podilskyi
д. с.-г. н., професор, членкореспондент НААН України
O. Tsvigun, State Agrarian and Engineering University in Podilya, Kamianets-Podilskyi
к. вет. н., доцент

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How to Cite
Tsvigun, A., & Tsvigun, O. (1). THE PRODUCTIVITY OF COWS AND AVAILABILITY OF MICROELEMENTS AT DIFFERENT LEVELS OF DRY SUBSTANCE AND PROTEIN IN THE RATION. Theoretical and Applied Veterinary Medicine, 4(1), 279-283. Retrieved from https://bulletin-biosafety.com/index.php/journal/article/view/140