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Mljekarstvo : časopis za unaprjeđenje proizvodnje i prerade mlijeka, Vol. 63 No. 4, 2013.

Izvorni znanstveni članak

The effect of parity on the proportion of important healthy fatty acids in raw milk of Holstein cows

Luděk Stádník ; Department of Animal Husbandry, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 16521, Prague 6 - Suchdol, Czech Republic
Jaromír Ducháček
Monika Okrouhlá
Martin Ptáček
Jan Beran
Roman Stupka
Lukáš Zita

Puni tekst: engleski, pdf (187 KB) str. 195-202 preuzimanja: 523* citiraj
APA 6th Edition
Stádník, L., Ducháček, J., Okrouhlá, M., Ptáček, M., Beran, J., Stupka, R. i Zita, L. (2013). The effect of parity on the proportion of important healthy fatty acids in raw milk of Holstein cows. Mljekarstvo, 63 (4), 195-202. Preuzeto s https://hrcak.srce.hr/111097
MLA 8th Edition
Stádník, Luděk, et al. "The effect of parity on the proportion of important healthy fatty acids in raw milk of Holstein cows." Mljekarstvo, vol. 63, br. 4, 2013, str. 195-202. https://hrcak.srce.hr/111097. Citirano 26.04.2019.
Chicago 17th Edition
Stádník, Luděk, Jaromír Ducháček, Monika Okrouhlá, Martin Ptáček, Jan Beran, Roman Stupka i Lukáš Zita. "The effect of parity on the proportion of important healthy fatty acids in raw milk of Holstein cows." Mljekarstvo 63, br. 4 (2013): 195-202. https://hrcak.srce.hr/111097
Harvard
Stádník, L., et al. (2013). 'The effect of parity on the proportion of important healthy fatty acids in raw milk of Holstein cows', Mljekarstvo, 63(4), str. 195-202. Preuzeto s: https://hrcak.srce.hr/111097 (Datum pristupa: 26.04.2019.)
Vancouver
Stádník L, Ducháček J, Okrouhlá M, Ptáček M, Beran J, Stupka R i sur. The effect of parity on the proportion of important healthy fatty acids in raw milk of Holstein cows. Mljekarstvo [Internet]. 2013 [pristupljeno 26.04.2019.];63(4):195-202. Dostupno na: https://hrcak.srce.hr/111097
IEEE
L. Stádník, et al., "The effect of parity on the proportion of important healthy fatty acids in raw milk of Holstein cows", Mljekarstvo, vol.63, br. 4, str. 195-202, 2013. [Online]. Dostupno na: https://hrcak.srce.hr/111097. [Citirano: 26.04.2019.]

Sažetak
The objective of this study was to determine and evaluate the effect of parity on the fatty acids groups’ proportion in Holstein cows’ milk during the first phase of lactations, with an emphasis on its potential importance for consumer health. A total of 25 Holstein cows, 9 primiparous, 9 in the 2nd, and 7 in the 3rd and subsequent parity, were observed and sampled at 7-day intervals through the first 17 weeks of lactation. The percentage proportion of saturated (hypercholesterolemic and volatile as its components) and unsaturated (monounsaturated and polyunsaturated as its components) fatty acids in the samples of milk fat (n=425) was determined. The effects of parity and negative energy balance, as well as regression, on the lactation week and the fat to protein ratio were evaluated using SAS 9.3. A significantly (P<0.01) lower proportion of unhealthy hypercholesterolemic fatty acids was detected in primiparous cows (-2.67 %) and those in the 3rd and subsequent lactation (-2.94 %) compared to the 2nd lactation, as well as a simultaneously higher proportion of healthy unsaturated fatty acids (+2.07, respectively +3.08 %). The determined relationships corresponded to organism stress evoked by the initiation of milk production and its maintenance in higher parities. Therefore, the generally required prolongation of dairy cows’ longevity can influence on the quality of raw milk, especially considering composition of fatty acids.

Ključne riječi
cattle; longevity; milk production; milk quality; milk fat composition

Hrčak ID: 111097

URI
https://hrcak.srce.hr/111097

[hrvatski]

Posjeta: 854 *