Naslov
Prevalence of metabolic disorders and effect on subsequent daily milk quantity and quality in Holstein cows

Autori
Gantner, Vesna ; Bobić, Tina ; Potočnik, Klemen

Izvornik
Archiv für Tierzucht = Archives animal breeding (0003-9438) 59 (2016), 3; 381-386

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
prevalence of metabolic disorders ; fat to protein ratio ; Holstein

Sažetak
Aiming determination of the metabolic disorders prevalence as well as the effect of subclinical disorders on daily milk traits of Holsteins over 1 million (1, 962, 831) test-day records were analysed. The metabolic disorders (ketosis/acidosis) prevalence was indicated by the fat to protein (F/P) ratio, while subclinical disorder was indicated by the F/P ratio and cows daily production. The effect of subclinical disorders on daily milk traits were tested by Scheffe's method (SAS/STAT).The highest ketosis prevalence occurred in early lactation. In the first parity cows ketosis prevalence was highest in the first 15 days of lactation, while in cows in higher lactations, prevalence peak occurred at 25th day. Higher ketosis prevalence during entire lactation, was observed in multiparous comparing to the first parity cows. Regarding the acidosis prevalence, high values were determined at the beginning of the lactation with decreasing trend till the mid lactation when prevalence increase up to 22%. The highest decrease in daily milk yield as consequence of subclinical ketosis was determined in first parity and cows in 4+ lactation in amount of 4.21 and 3.72 kg/day, respectively. Significant negative effect of subclinical acidosis on daily milk yield (2.79 kg/day)was highest in cows in third lactation. Production decline in subsequent milk controls due to subclinical ketosis/acidosis in all cows was also determined. Subclinical disorders, also significantly alternate daily milk quality. This indicate that test day records could be used as cost effective and non- invasive method for monitoring the herd health.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA