Abstract:
This study was designed to determine the effects of adding chromium
as supplement, on the general performance and milk production of diary
Cows under Sudan conditions. During the period of 30th June to 25 Aug
2010.
The experimental animals were randomly divided into two groups: the
first group (three cows) was fed a control diet, while the second group (four
cows) was fed diet supplemented with chromium yeast. (Alltech, Inc.
Nicholasvilleky US.A.) Chromium was added at manufacturer's recommend
level (4 g/head/day).
Maximum and minimum temperatures during the experimental period
was recorded as 42.60C and 37.30C respectively.
The results of this study showed that adding chromium yeast to the
ration of these experimental cows caused a significant increase (P < 0.01) in
milk production from 14.82 + 67kg in control to 19.61 + 60kg for treated
group.
No significant differences were observed between the two groups in
feed intake, but a notable decrease in body temperature causing a relatively
less stress on the treated group.
Also the results of this study have shown decreases in heat stress of
the treated group, due to decreases in the body temperature.
