TY  - JOUR
T1  - Effects of Bioassay and Age on Amino Acid Digestibility and Metabolizable Energy of
Soybean, Sunflower and Canola Meals
AU - Yaghobfar, Akbar 
JO  - Research Journal of Poultry Sciences
VL  - 8
IS  - 2
SP  - 5
EP  - 16
PY  - 2015
DA  - 2001/08/19
SN  - 1993-5285
DO  - rjpscience.2015.5.16
UR  - https://makhillpublications.co/view-article.php?doi=rjpscience.2015.5.16
KW  - Broiler
KW  -caecectomized
KW  -intact cockerels
KW  -oilseed meal
KW  -canola
KW  -soyabean
AB  - The experiment was conducted to determine
metabolizable energy and amino acid digestibilities of the
soybean, sunflower and canola meals using broiler
chickens by collection digesta from the terminal ileum
and excreta using titanium oxide (indigestible marker) in
intact and caecectomized cockerels. The mean excreta
apparent and true digestibility of amino acid in broiler and
intact cockerel for soybean meal were 76.99, 78.07,
84.18 and 88.35 sunflower meal: 92.16, 92.84, 78.09 and
85.94 and canola meal 69.82, 70.22, 86.47 and 88.50%,
respectively. The mean values of ileum apparent and true
digestibilities (Standardized Ileal digestibility) of amino
acid in broiler for soybean meal were 72.18 and 73.12;
sunflower meal: 47.48 and 48.47 and canola meal: 62.05
and 62.45%, respectively. The average apparent and true
digestibilities of amino acid in caecectomized cockerel
and broiler in soybean meal were 80.34 and 84.45
sunflower meal 74.48 and 82.47 and canola meal 84.74
and 87.12%, respectively. Apparent digestibility of amino
acid in soybean, sunflower and canola meals measured in
broiler (excreta and ileum) were 9-11, 34-50 and 19-27%
units lower than those measured in intact and
caecectomized cockerel. The AME, AMEn, TME and
TMEn values for canola and sunflower meals obtained at
21 and 42 days broiler age were significantly higher than
cockerels. Intact cockerels obtained higher metabolizable
energy from canola and sunflower meals than those
broiler excreta or ileum and caecectomized cockerels.
ER  -