Naslov
The effect of season on the estimated prevalence risk of metabolic disorders (ketosis/acidosis) in Holstein first parity cows using precision dairy cattle technologies

Autori
Poljak, Franjo ; Mijić, Pero ; Lončarić, Zdenko ; Steiner, Zvonimir ; Gantner, Vesna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, pp prezentacija, znanstveni

Skup
International Conference AgroFood

Mjesto i datum
Rzeszów, Poljska, 19.11.2020

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
metabolic disorders ; acidosis ; ketosis ; dairy cows ; precision dairy farming ; milk recording

Sažetak
Metabolic disorders, primarily ketosis and acidosis, represents one of the most common disorders in dairy cows with significant consequent on herd profitability. Numerous studies indicated that the prevalence of metabolic disorders in dairy cows induce economic losses for milk producers due to treatment costs, reduced milk production, impaired reproduction, and ultimately decreased stayability of animals. Therefore, in order to enable sustainable business of dairy farm, it is extremely important to detect the cows that are at risk of subclinical metabolic disorders (ketosis/acidosis) as well as to prevent the development of the clinical phase. Milk recording represents one of the routine actions on dairy cattle farm. It is performed every month and includes the collection of performance data of dairy cows that are under the breeding and selection. The results of milk recording together with the pedigree data are the basis for estimation of animals’ breeding value, which are the basis for selection in accordance with breeding program of each breed. Furthermore, milk recording results also enable farmer to optimize management of dairy herd and early detection of metabolic disorders in the subclinical phase by using the precision dairy farming technologies. The daily fat and protein content in milk represents the basis for estimation of the prevalence risk of subclinical disorders, with the optimal values of the ratio of milk fat to protein in interval 1.1 - 1.5. The deviation from this values indicate the prevalence of acidosis (F/P < 1.1) or ketosis (F/P > 1.5). The aim of this research was to determine the variability of daily fat and protein content in milk and milk to protein ratio and consequently the prevalence risk of subclinical disorders in Holstein first parity cows in Eastern Croatia depending on the season based on the results of milk recording that is using the precision dairy cattle technologies. The research results indicate that the variability of daily fat and protein content, fat to protein ratio, as well as prevalence of metabolic disorders in Holstein first parity cows depend of daily milk production, stage of lactation, age at first calving, and season of milk recording. Therefore, those effects should be taken into account in the statistical model for estimation of the metabolic disorders prevalence risk in dairy cows based on milk recording data.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA