Izvorni znanstveni članak
https://doi.org/10.33128/s.77.1-2.6
The effects of birth and calving seson and birth year on milk production and composition in first lactating cows
Lucia Mačuhová
orcid.org/0000-0002-9624-1348
; National Agricultural and Food Centre, Research Institute for Animal Production Nitra, Lužianky, Slovak Republic
Juliana Mačuhová
; Institute for Agricultural Engineering and Animal Husbandry, Freising, Germany
Marta Oravcová
orcid.org/0000-0002-7823-8911
; National Agricultural and Food Centre, Research Institute for Animal Production Nitra, Lužianky, Slovak Republic
Vladimír Tančin
; National Agricultural and Food Centre, Research Institute for Animal Production Nitra, Lužianky, Slovak Republic; Institute of Animal Husbandry, Faculty of Agrobiology and Food Resources, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic
Sažetak
The aim of this study was to investigate the effects of birth and calving season (spring, summer, autumn, and winter (astronomical)) and birth year on milk production and composition (content of lactose, fat, protein, and total fat and protein (kg, %)) of Holstein first lactating cows. The analysed data based on milk production records of the first lactation Holstein cows (n=158 and n=246 on farm 1 and farm 2, resp.) recorded within the years of 2013 to 2017 on two farms in west part of Slovakia. The birth season of heifers had no significant effect on the milk composition and production. The significant effect of birth year was observed on all parameters evaluated, except on total fat and protein content (%). Milk yield, depending on the birth year, increased from 7793.31±1629.31 kg (in cows born in year 2013) to 9628.76±1386.45 kg (in cows born in year 2017). Similarly, the content (kg) of all components evaluated was higher in cows born in year 2017 than in cows born in year 2013. The influence of the farm was evident in all parameters evaluated, except for total fat and protein and lactose content (%). Milk production and milk composition of first-lactation cows appear to be influenced by factors other than calving and birth season. The management practices implemented on the evaluated farms could be one of the influencing factors
Ključne riječi
first lactating cows; milk production and composition; birth season; calving season; birth year
Hrčak ID:
307682
URI
Datum izdavanja:
19.6.2023.
Posjeta: 205 *