REDUCTION IN BODY CONDITION OF COWS AFTER CALVING AND THEIR LACTATION YIELD
Journal Title: Acta Scientiarum Polonorum Zootechnica - Year 2016, Vol 15, Issue 3
Abstract
The aim of the study was to analyse the effect of the magnitude of losses in body condition after calving and the duration of the period of its decline on yield in 435 standard lactation periods in Polish Black-and-White Holstein-Friesian cows kept in five barns. The magnitude of losses in body condition after calving and the duration of the period of its decline were estimated on the basis of monthly body condition scores in the 5-point BCS scale, and data pertaining to productivity were obtained from the SYMLEK system. It was determined that the greater the mobilization at the start of lactation of fat accumulated by cows before parturition, the higher was the production of milk, fat, protein and dry matter. The decrease in body condition score was less strongly associated with the basic composition of the milk obtained in the standard lactation period. Longer duration of the negative energy balance was also associated with higher yield of milk, fat and dry matter and with higher content of fat in the milk. Increased length of the period of body condition decline was accompanied by a decrease in protein content in the milk.
Authors and Affiliations
Danuta Borkowska, Ewa Januś, Robert Polski
Keywords
Related Articles
- EP ID EP374136
- DOI 10.21005/asp.2016.15.3.04
- Views 67
- Downloads 0
Beef cattle breeding in Ukraine
The most of Ukrainian cattle is obtained through fattening the calves deriving from the dairy cows. During the last two decades, due to the reduction in local cattle population, the beef production has drastically decrea...
Assessment of ultraviolet light effect in hatching eggs disinfection on hatchability traits of two breeds of quails and chickens
This study was carried out to investigate the effectiveness of ultraviolet light (UV) (262 nm, 10 mW ∙ cm–2) used as a disinfectant of hatching eggs for two breeds of chicken; Greenleg Partridge (GP) and Polbar (Pb) and...
Differences in the level of urea in milk between standard and extended lactation period and the impact on the environment
The N concentration of milk urea is one of several factors that allow prediction of ammonia emissions from dairy cattle manure. The aim of the study was to investigate the effect of selected environmental factors on urea...
COMPARISON OF THE GROWTH AND BODY CONFORMATION OF DUCKS REARED IN SEMI-INTENSIVE OR INTENSIVE SYSTEMS
The aim of the study was to compare the growth and body conformation of ducks raised in a semi-intensive and an intensive system. The material for the research was Pekin Star 53 H.Y. crossbred meat ducks of French origin...
Parasitic fauna of gastrointestinal tract of horses and evaluation of deworming effectiveness
The aim of the study was to determine the species composition of parasitic fauna of the gastrointestinal tract of horses and to assess the efficacy of ivermectin. Incidence and intensity of infection was determined based...