Shirnina NM, Kononets VV.

Animal Husbandry and Fodder Production. 2024. Vol. 107, no 4. Р. 192-205.

doi:10.33284/2658-3135-107-4-192

Original article

Cavitated concentrates as a stimulating factor for the productivity of dairy cows

 

Nadezhda M Shirnina1, Valeriy V Kononets2

1,2Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, Orenburg, Russia

1shirnina.2021@mail.ru, https://orcid.org/0000-0002-3908-3865

2vale056@mail.ru, https://orcid.org/0000-0002-8482-4466

 

Abstract. The article presents the results of the experiment on the positive effect of cavitated concentrates (grain mixture and wheat bran) in the diet of dairy cows of the Red Steppe breed on nutritional value, palatability and bioavailability of nutrients. Biochemical analysis of cavitated grain mixture and wheat bran, in terms of dry matter of the original raw materials indicates that with equivalent energy values, there were some changes in biochemical indicators. Thus, the content of crude protein and crude fat increased by 8.5 and 2.5%; 6.4 and 1.09% in favor of cavitated feeds. The content of crude fiber and starch in the grain mixture decreased by 3.5 and 3.7%, in wheat bran - by 19.4 and 3.9%. The increase for sugars in the grain mixture was 15.2 g, in wheat bran - by 6.2 g. The feed intake of the diet, on average during the experiment compared to the control, was higher in cows of the I and II experimental groups: for roughage - by 2.3 and 3.7%, for succulent - 3.6 and 6.0%. During the record period of the experiment, the milk productivity of cows receiving a diet with traditional concentrate preparation was 2070 kg, which is 22.9% less than that of their peers receiving a cavitated grain mixture with the diet, and 26.2% less than that of animals receiving cavitated wheat bran. At the same time, having small differences in the content of fat and protein in milk (3.48-3.55% and 3.28-3.30%), the increase in milk yield in experimental groups I and II affected the yield of "milk fat" and "protein mass fraction". Thus, these indicators were 72.45 in the control, 90.35 in I and 90.88 kg and 68.1; 84.0; 85.7 kg in II, which is higher in comparison with the control by 24.7 and 23.3%; 25.4 and 25.8%. A positive relationship was revealed between the content of metabolizable energy in the diet and daily milk yield, with an increase in this indicator in the diet by 2.51 and 2.76%, the daily milk yield increased by 22.9 and 26.2%, respectively. A high positive correlation was found between the amount of protein in milk and the sugar content in the diet (r=0.99), indicating a high degree of interdependence. The content of exchange energy in the diet correlated with the amount of fat in daily milk yield (r=0.99).

Keywords: lactating cows, Red Steppe breed, feeding, structure of diets, grain mixture grinding, cavitated grain mixture, cavitated wheat bran, milk productivity, milk quality

Acknowledgments: the work was performed in accordance to the plan of research works for 2024-2026 FSBRI FRC BST RAS (No. FNWZ-2024-0002).

For citation: Shirnina NM, Kononets VV. Cavitated concentrates as a stimulating factor for the productivity of dairy cows. Animal Husbandry and Fodder Production. 2024;107(4):192-205. (In Russ.). https://doi.org/10.33284/2658-3135-107-4-192

 

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Information about the authors:

Nadezhda M Shirnina, Cand. Sci. (Agriculture), Senior Researcher, Department of Feeding of Farm Animals and Feed Technology named after S.G. Leushin, Federal Research Centre of Biological Systems and Agricultural Technologies of the Russian Academy of Sciences, 29 9 Yanvarya St., Orenburg, 460000, tel.: 8(3532)308-179.

Valeriy V Kononets, post-graduate student, Junior Research Associate of the Department of Animal Feeding and Feed Technology named after S.G. Leushin, Federal Research Centre of Biological Systems and Agricultural Technologies of the Russian Academy of Sciences, 29 9 Yanvarya St., Orenburg, 460000, tel.: 8(3532) 308-179.

 

The article was submitted 04.09.2024; approved after reviewing 18.11.2024; accepted for publication 16.12.2024.

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