Izvorni znanstveni članak
MILK UREA AS A PARAMETER OF DAIRY COW FEEDING
Dražen Čuklić
; Visoko Gospodarsko učilište u Križevcima, Republika Hrvatska
Đurica Kalember
; Visoko Gospodarsko učilište u Križevcima, Republika Hrvatska
Sažetak
The influence of feeding on milk composition was investigated at the dairy farm of the cattle practicum of the Secondary Agricultural School at Križevci during the summer period of 2003. Special emphasis was laid on the influence of protein and energy levels on urea concentration in milk. Milk urea is an applicable indicator of the availability of nutrients in the organism. Feeding dairy cows, as trial subjects, varied considerably in the studied period, which caused frequent changes in protein and energy levels. Milk urea, as the tested parameter, rendered, depending on feeding, very low results (5.38 mg/dcl) in the first feeding phase, which were then increased by ration balancing to 22.45 and 32.08 and 30.15 mg/dcl by the end of the monitored period. The increase of urea concentration in milk was accompanied by an increase of the milk fat content from 4.29 to 4.75% and protein content from 4.29 to 4.75%
Ključne riječi
dairy cows; feeding; milk; milk urea
Hrčak ID:
164593
URI
Datum izdavanja:
25.3.2004.
Posjeta: 2.271 *