Stručni rad
Changes and variations of body condition scoring values in dairy cows during production cycle
Dražen Đuričić
orcid.org/0000-0002-8013-2091
; Veterinarska stanica Đurđevac d.o.o., Đurđevac, Hrvatska
Predrag Kočila
; TSH Čakovec, Čakovec, Hrvatska
Damjan Gračner
; Veterinarski fakultet Sveučilišta u Zagreb, Zagreb, Hrvatska
Ljiljana Bedrica
; Veterinarski fakultet Sveučilišta u Zagreb, Zagreb, Hrvatska
Ivona Žura-Žaja
orcid.org/0000-0002-0595-2524
; Veterinarski fakultet Sveučilišta u Zagreb, Zagreb, Hrvatska
Marko Samardžija
orcid.org/0000-0003-0402-3173
; Veterinarski fakultet Sveučilišta u Zagreb, Zagreb, Hrvatska
Sažetak
We can evaluate the metabolic and energy status of dairy cows at any stage of the production cycle on the basis of blood analysis, and by comparing numerous biochemical indicators. In addition, we can use the simple, inexpensive and practical method of body condition scoring (BCS), which is a determination of the amount of body reserves (fat and muscle tissue) that the cow possesses at a certain stage of production. On the numerical scale, scores from 1 to 5, with score precision to 0.25 points, evaluate the physical fitness of breeder cows. Extremely skinny cows are rated 1, and obese ones with a grade of 5. A BCS less than 2.75, but also higher than 3.75 (on a scale of 1 to 5) around calving are associated with health problems such as fatty liver, ketosis and reduced milk production. The transition or transitional period is the period 2 to 4 weeks before and 2-4 weeks after calving, which is characterized by deep endocrine and metabolic changes that follow increased milk production during early lactation. The dry matter intake and energy status is lower and this results in negative energy balance (NEB). Energy requirements increase during the transition period, resulting in hypoglycaemic status. This situation requires a compensatory response by the organism, consisting of increased adipose tissue lipolysis, gluconeogenesis and glycogenolysis in the liver, mobilization of protein stocks in muscle tissue and mobilization of minerals in the bones. Genetic selection, with the aim of increasing milk production during early lactation, has resulted in cows successfully mobilizing more body reserves at the expense of their own health and fertility
Ključne riječi
cows; body condition scoring; production cycle
Hrčak ID:
250155
URI
Datum izdavanja:
1.12.2020.
Posjeta: 731 *