Factors affecting the freezing point of milk from Polish Holstein-Friesian cows

Agnieszka Otwinowska-Mindur 1 , Ewa Ptak 1  and Agnieszka Grzesiak 1
  • 1 Department of Genetics and Animal Breeding, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 , Kraków, Poland

Abstract

The objective of this study was to estimate the influence of lactation number, month of milk sampling, lactation stage and herd size on the freezing point of milk of Polish Holstein‑Friesian cows. Data comprised 4,719,787 milk samples from the first seven lactations of 752,770 Polish Holstein- Friesian cows. Milk freezing point (MFP), milk yield, and fat and protein content were analyzed. The mean MFP of milk samples (-0.5326°C) as well as more than 92% of all milk samples did not exceed the quality limit for the freezing point of cows′ raw milk, which, following Polish standards, was taken to be -0.52°C. The freezing point of milk samples, milk yield, fat and protein content were highly significantly affected by all examined factors: month of sampling, successive lactations, stage of lactation, and herd size. MFP was lowest in milk samples taken from January to March, and highest in samples from November to December. MFP increased with lactation number. Mean MFP decreased with time within lactation, except the first stage (5-35 days in milk). Generally, MFP was highest in small herds (up to 9 cows) and lowest in large herds (more than 150 cows).

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  • Bjerg M., Rasmussen M.D., Nielsen M.O. (2005). Changes in freezing point of blood and milk during dehydration and rehydration in lactating cows. J. Dairy Sci., 88: 3174-3185.

  • Brouwer T. (1981). Calculations concerning the determination of the freezing point depression of milk. Neth. Milk Dairy J., 35: 159-175.

  • Brzozowski P., Zdziarski K. (2005). Freezing point of udder-milk in milk-producing cows (in Polish). Med. Weter., 61: 934-936

  • Brzozowski P., Zdziarski K. (2006). Influence of genotype, age, lactation stage and daily milk performance of Black and White cows on freezing point of milk (in Polish). Med. Weter., 62: 93-95.

  • Hanus O., Gencurova V., Kucera J., Vyletelova M., Trinacty J. (2009). Analyse of relationships between freezing point and selected indicators of udder health state among cow, goat and sheep milk. Acta U. Agr. Silv. Mendelian. Brun., 5: 103-110.

  • Hanus O., Frelich J., Tomaska M., Vyletelova M., Gencurova V., Kucera J., Trinacty J. (2010). The analysis of relationships between chemical composition, physical, technological and health indicators and freezing point in raw cow milk. Czech J. Anim. Sci., 55: 11-29.

  • Henno M., Ots M., Joudu I., Käart T., Kart O. (2008). Factors affecting the freezing point stability of milk from individual cows. Int. Dairy J., 18: 210-215.

  • ICAR (2014). International agreement of recording practices - ICAR Recording Guidelines approved by the General Assembly held in Berlin, Germany. http://www.icar.org/wp-content/uploads/2015/08/Guidelines_2014.pdf, [accessed 7 November 2015].

  • Janstova B., Drackova M., Navratilova P., Hadra L., Vorlova L. (2007). Freezing point of raw and heat-treated goat milk. Czech J. Anim. Sci., 52: 394-398.

  • Kedzierska - Matysek M., Litwinczuk Z., Florek M., Barlowska J. (2011). The effects of breed and other factors on the composition and freezing point of cow’s milk in Poland. Int. J. Dairy Technol., 64: 336-342.

  • MARD (2004). Regulation of the Ministry of Agriculture and Rural Development of 18 August 2004 on veterinary requirements for milk and dairy products. The Official Journal, No. 188, Item 1946 (in Polish).

  • Otwinowska -Mindur A., Ptak E. (2016). The freezing point of milk of Polish Holstein-Friesian cows. International Conference on Biotechnology and Welfare in Animal Science withasession on "7 Poultry Days", Kraków, 23-24 June, p. 51.

  • Sala C., Morar A., Morvay A., Nichita I., Jorz S. (2010). Research regarding factors that influenced the variation of freezing milk. Lucrari Stiinlifice Medicina Veterinara, 2: 204-211.

  • SAS (2014). SAS/STAT 13.2 User’s Guide. SAS Institute Inc. Cary, NC.

  • Slaghuis B.A. (2001). The freezing point of authentic and original farm bulk tank milk in the Netherlands. Int. Dairy J., 11: 121-126.

  • Zagorska J., Ciprovica I. (2013). Evaluation of factors affecting freezing point of milk. World Academy of Science, Engineering and Technology, 7: 389-394.

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