Abstract:
The research was conducted to determine the effects of feeding mint leaf powder on the
performance of broiler chicken. A total of 225 day-old Lohman meat broiler chicks were
allocated randomly to five treatment groups with three replications having 15 birds per
replication. There were five groups. e. g. T
0
(Basal feed), T
1
(Basal feed+Antibiotic), T
2
(Basal
feed+1.0% mint leaf powder), T
3
(Basal feed+1.50% mint leaf powder) and T
4
(Basal
feed+2.0% mint leaf powder). Result demonstrated that the body weight (g) was insignificantly
(P>0.05) higher in T
2
(1965) and lowest in T
1
(1838.66). The body weight gain (g) was
insignificantly (P>0.05) higher in T
2
(1923) than other groups including control group
.
Feed
consumption (g) was significantly (P<0.05) higher in T
3
(2489) than other groups including
control group. The better feed conversion ratio (FCR) was significantly (P<0.05) observed in
T
2
(1.20) group compared to other groups. Dressing percentage was insignificantly (P<0.05)
higher in T
3
(70.25) and lower in T
0
(67.95). The weight (g) of liver, heart, spleen and gizzard
in T
2
was significantly higher (P<0.05). The weight (g) of thigh, drumstick and back in T
2
were insignificantly (P>0.05) higher. Insignificantly (P>0.05) survivability rate (%) was better
in all groups except T
4
. BCR is insignificantly higher (P>0.05) in treatment group T
2
(1.91)
than control group (T
0
). Average counts of E. coli and Salmonella sp. bacteria were
insignificantly (P>0.05) lowest in T
3
(6.18) and T
4
(4.56) respectively. Significantly (P<0.05)
more WBC was found in T
0
(14.60) and less in T
4
(1.20). But, T
2
(12.23) group was better result
than others group. Significantly (P<0.05) the highest lymphocyte was found in T
4
(3.23) and
lowest in T
3
(2.220). But, T
2
(2.68) treatment group has better result than other groups including
control group. Significantly (P<0.05) the highest granulocyte was found in T
0
(11.73) and
lowest in T
1
(3.55). But, T
2
(9.69) treatment group has better result than others group. Better
result was found in T
2
(basal feed+1.0% mint leaf powder)
group than others including control
group (T
0
).
Description:
A Thesis
Submitted to the Faculty of Animal Science & Veterinary Medicine,
Sher-e-Bangla Agricultural University, Dhaka-1207, in Partial Fulfillment of the
Requirements for the
Degree of
MASTER OF SCIENCE (MS)
IN
ANIMAL NUTRITION
