Oral and Poster Abstracts

The aim of the monitoring was to compare the influence of fat
supplementation in the form of full-fat soybean seeds and hydrolyzed
palm oil as energy sources for the metabolism of dairy cows in early
lactation. During the first 8 lactation weeks, 17 dairy cows, divided into
experimental (E; n=8) and control (C; n=9) groups, were followed. The
basic diet was the same for both groups. The differences were in the
composition of the concentrate mixture, which had a balanced content
of nutrients, but different source of fat. The group E received heattreated
soybean seeds (22% in concentrates) and the group
C hydrolyzed palm oil. The two diets started to be fed on the day of
calving. Blood samples were taken weekly (1 st -5 th ) and 8 th weeks after
delivery. At the end of the experiment was taken ruminal fluid. During
the experiment BCS in both group worsened similarly. In group E
decreased from 3.8±0.2 to 3.3±0.3 and in Group C from 3.5±0.4 to
3.1±0.4. The BCS of the group E was on average by 0.3 point higher
than in group C, but the difference was not significant. Despite this
unfavourable factor, a better performance of hepatic metabolism was
proved in the group E. In this group lower concentrations of nonesterified
fatty acids was identified in 3 rd (0.96±0.38 vs. 1.76±0.63
mmol.l -1 ; p