Abstract:
The demand for poultry products in Bangladesh has grown significantly. Poultry sector
needs to increase significantly to meet the growing domestic demand. However,
atmospheric ammonia inhibits broiler performance. Therefore, a study was planned to
investigate the effects of ammonia emission from different types of broiler houses and
its impact on productivity. A total of 135 day-old Lohmann broiler chicks were reared
at SAU Poultry Farm, Dhaka-1207. Chicks were divided randomly into 3 experimental
groups of 3 replications R
1
, R
2
and R
3
, where each replication contains 15 birds. These
three treatment groups were designated as T
0
indicated without ceiling fan. Whereas T
1
, T
1
and T
2
and T
2
. T
0
was control group which
were ceiling fan and ceiling fan with
exhaust fan, respectively. Results demonstrated that the average ammonia level was
same at the end of 1
st
week, however it varied significantly (P<0.05) at the end of 2
,
3
rd
and 4
th
week. The control group (T
0
) indicated the highest ammonia emissions at the
end of 2
nd
, 3
rd
and 4
th
week and T
2
showed the lowest ammonia emissions at the end of
2
nd
, 3
rd
and 4
th
week. At the end of 4
th
week significantly (P<0.05) higher emissions of
ammonia was found in control group T
0
(11.63
a
±0.17 ppm) and lower was found in
treated group T
2
(6.53
c
±0.14 ppm). BWG (Body Weight Gain), BW (Body Weight) and
FCR at the end of 4
th
week were insignificant (P>0.05) in different group, however
better BWG, BW and FCR were found in treated group T
2
(BWG 1812.33±26.82 gm,
BW 1852.76±26.82 gm,
FCR 1.31±0.04). Dressing percentage was non significantly
(P>0.05) higher in T
1
(65.10±1.05) and T
2
(65.72±0.35) than control group T
0
(64.33±0.48). The weight of spleen and gizzard in exhaust fan treated group T
2
was
significantly higher (P<0.05) than control group (T
0
). The weight of thigh, drumstick
and back in exhaust fan treated group T
2
was non significantly higher (P>0.05) than
control group (T
0
). Survivability rate (%) of the chicken was significantly higher
(P<0.05) in T
2
and T
1
group than control group (T
0
). In case of cost benefit ratio
analysis, BCR was significantly (P<0.05) higher in treatment group T
1
T
2
(1.35±0.01) than T
0
(1.35±0.01)
(1.30±0.02). Therefore, the research recommended that poultry
house with exhaust fan at bird’s level could be used on broiler production for better
performance and profitability.
nd
and
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
SEMESTER: January-June/2021
