N. V. Burachevskiy, S. G. Mayzel, I. M. Donnik
Ural State Agrarian University, Ekaterinburg, Russia
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Volume 25 No. 3
Date of paper submission: 29.10.2024, date of review: 31.01.2025, date of acceptance: 03.02.2025.
Published: 03/31/2025
Abstract. The purpose is the analysis of the influence of the season of the year and the level of milk productivity on the milk composition of Holstein cows. The development of technology for the production of lactose-free milk by baromembrane methods should take into account the changing physico-chemical characteristics of raw materials. The study of the data confirmed that a certain number of cycles of the diafiltration process can be used to reduce the level of lactose in milk to the level established by the regulations. The number of cycles depends primarily on the mass fraction of lactose in the source milk. Therefore, it is important to know the level of the main components of milk depending on seasonal factors, especially lactose, in order to organize a more efficient filtration process. This is the reason for the purpose of the research. Methods. The dairy company conducted studies of fat, protein and lactose in cows with productivity from 9 to 12 thousand kg per lactation. As part of the study, all experimental animals were provided with the same conditions of care and nutrition. The research methods corresponded to the current standards. The milk quality analysis was performed using the FOSS MilkoSkanTMFT+ device and covered the following parameters: fat percentage, protein percentage, lactose percentage. Results. Studies have shown that changes in the level of lactose in milk are not associated with an increase in its productivity. However, an obvious seasonal cycle has been identified that should be considered when harvesting low-lactose milk. The maximum protein content in milk was observed in autumn, while the winter months were characterized by high levels of lactose. The level of fat in milk from cows with different productivity varied in different ways and depended on the time of the year. Scientific novelty. As a result of studies aimed at studying changes in lactose levels in the milk of Holstein cows with different productivity at different times of the year, data were obtained for the first time that make it possible to exclude 1-2 cycles of diafiltration in the spring and autumn periods of the year when receiving lactose-free milk.
Keywords: lactose-free milk, season of the year, milk productivity, mass fraction of lactose, mass fraction of fat, mass fraction of protein, diafiltration
For citation: Burachevskiy N. V., Mayzel S. G., Donnik I. M. The influence of seasonal dynamics of milk components of highly productive Holstein cows on the efficiency of the diafiltration process. Agrarian Bulletin of the Urals. 2025; 05 (04): 412‒421. https://doi.org/10.32417/1997-4868-2025-25-03-412-421 (In Russ.)
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