TY  - JOUR
T1  - Effect of Diets Formulated on the Basis of Four Critical Essential Amino Acids on Crude
Protein Requirement, Carcass Quality and Haematological Parameters of Broiler Finisher
Chickens Reared under Tropical Environment
AU - Opoola, E. AU - Ogundipe, S.O. AU - Bawa, G.S. AU - Onimisi, P.A. AU - Buba, W. 
JO  - Research Journal of Poultry Sciences
VL  - 13
IS  - 1
SP  - 1
EP  - 6
PY  - 2020
DA  - 2001/08/19
SN  - 1993-5285
DO  - rjpscience.2020.1.6
UR  - https://makhillpublications.co/view-article.php?doi=rjpscience.2020.1.6
KW  - Broiler
KW  -essential amino acids
KW  -crude protein
KW  -carcass quality
KW  -haematology
KW  -tropical environment
AB  - A study was conducted in a completely
randomized design to evaluate the effect of diets
formulated on the basis of four critical essential amino
acids (lysine, methionine, tryptophan and threonine) on
the crude protein requirement of broiler finisher chickens
(28-56 days) reared under tropical environment. One
hundred and eighty chickens were used in this
experiment. There were four experimental diets each with
three replicates (15 birds per replicate). The experimental
diets were formulated in a gradual crude protein increase
from 18-21 by 1% interval. Diet 1-4 contained 18-21%
dietary crude protein respectively. All the diets were
formulated to have an additional 10% for the four critical
essential amino acids. The performance of chickens fed
19% CP was similar to chickens fed 20 and 21% CP diets
in terms of final weight, weight gain and feed conversion
ratio. Feeding 18% CP with essential amino acids diet
resulted in significantly (p<0.05) lower final weight,
weight gain, average daily weight gain and poor FCR than
those fed diets higher crude protein diets. Generally, it
was observed that chickens fed 19, 20 and 21% CP
supplemented with balanced essential amino acids were
statistically similar in terms of the carcass weight,
dressing percentage, thighs, drumsticks, heart, lung and
back weights compared to the chickens fed 18% CP
supplemented with balanced essential amino acids. It can
be concluded that crude protein requirement of broiler
finisher chickens (28-56 days) can be reduced to 19%
with essential amino acids supplementation without
having any adverse effect on growth, carcass quality and
haematological parameters of broiler finisher chickens
reared under the tropical environment.
ER  -