الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
This work was conducted at the Animal Husban Department, Faculty of
Veterinary Medicine, Alexandria University to investigate the effect of
dietary chromium supplementation on gro performance, immune
response, carcass quality, some blood paramet rs and tissue response of
broiler chickens.
A total of 175 one day old Isa Hubbard chicks were used in this
experiment. The chicks were individually w ighed, wing-banded and
randomly allocated into seven groups (25 chicks er group) of mixed sex.
Experimental design and feeding program
The broiler chicks were fed on the basal diet prepared from a com ,
soybean meal-based diet. Stalter diet was $iv from 0-3 week of age
which was formulated to COl$lin 2950 kcal of etabolizable energy and
22.44 % crude protein. Aftelhat, chicks we~e d grower diet given from
L:_
3-5 week of age which . formulated to contain 3095 kcal of
metabolizable energy and 1
finisher diet given
was formulated to
crude protein. This diet was
o crude protfin Finally, chicks were fed
,\ of age tilllen of the experiment which
kcalofmet401 ble energy and 18.53%
. ated according to recommendation book
~as conside~
,t.· the basal tet
• I
• I
_~ i
:~
~
control, while the other
upplemented by OCY or
The first group of c .
experimental groups were
chromium chloride as folIo
fir •
-Chicks of the Ist group were fed on the basal diet (control ).
-Chicks of the 2nd and 3rd groups were fed on the basal diet supplemented
by 100 and 200 ug / kg diet OCY, respectively.
-Chicks of the 41h
, 5lh
, 6th and ih groups were fed on the basal diet
supplemented by 10, 20,30 and 40 mg Cr / kg diet as chromium chloride,
respectively. The different diets were fed throughout a 7 weeks
experimental period.
The following results were obtained:-
l-The final body weight of the chickens received diet supplemented by
chromium chloride at 20 mg / kg (group 5) was the best group weight
(2230.4 g), followed by chickens received diet supplemented by chromium
chloride at 10 mg /kg (group 4) 2198.36 g and chickens received diet
supplemented by organic chromium yeast at 200 flg / kg (group 3) 2195.6
g. These three groups were _ significantly increased (p >0.05 ) when
compared with those of the co•••• group.
2- The feed conversion ratio +iler chicks in different groups during the
first three weeks of expe ·.dicated no significant differences among
the different chick groups, . ~t the end of experiment the chickens
received diet supplemented fhromium chloride at 10 mg / kg had
significantly improvement mpared with those of the control group
(group 4), followed by chi ceived diet supplemented by chromium
chloride at 20 mg /kg (group ~.
3- protein efficiency ratio from 0-7 weeks of age was significantly
increased for the chickens received diet supplemented by chromium
chloride at 10 mg / kg (group 4) when compared to the all experimental
groups. PER in all experimental groups (supplemented by chromium
chloride or by organic chromium yeast) was better than those of the control
group.
4- performance index from 0-7 weeks of age was non significantly
increased for the chickens received diet supplemented by chromium
chloride at 10 mg / kg (group 4) when compared to those of the control
group.
5-The haemaggiutination inhibition of broiler chickens received diet
supplemented by chromium was nonsignificantly difference when
compared with those of the control group.
6-Dressing % and organ weifhts percent in relation to the carcass weight
(spleen, gizzard and abdomiasl ,fat) indicated no significant differences
between various broiler chick tp)Ups.
7-Liver weight percent in Jhickens received diet supplemented by
chromium chloride at 10 g (group 4) was significantly decreased
when compared with those of ontrol group.
8- Bursa weight percent’ ~hickens received diet supplemented by
””
chromium’ (group 4) was non significantly increased
when compared to those of
9- The liver enzymes
compared with those of
with chickens groups sup
, SGPT) were lower in value when
oup and alka1inephosphatase increased
d with OCY when compared with those.