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OJVRTM
Online Journal of Veterinary Research©
Volume 21(7):373-386, 2017.
Effects
of irradiation and extrusion on starch and protein in sorghum and rapeseed
performance in Cobb broiler chicks.
Azizalah Shabani 1, Mohammad Chamani1*, Parvin Shawrang2, Ali Asghar
Sadeghi 1, Mortaza
Rezaee3
1Department of Animal Sciences,
Faculty of Agricultural and National Resources, Sciences and Research Branch, Islamic
Azad University, Tehran, 2Agricultural Nuclear Research School,
Nuclear Sciences and Technology Research Institute, Atomic Energy Organization
of Iran, Karaj, 3Animal Sciences Research institute, Karaj, Iran
ABSTRACT
Shabani A, Chamani M, Shawrang P, Sadeghi AA, Rezaee M., Effects of
irradiation and extrusion on starch and protein in sorghum and rapeseed
performance in Cobb broiler chicks, Onl J Vet Res., 21(7):373-386,
2017.. Sorghum and rapeseed meal were subjected to electron beam
irradiation at a dose of 20 kGy and/or extruded at
145 °C for 15 seconds. Chemical
composition and morphology was determined by SDS-PAGE, electron microscopy and
X diffraction. Irradiated, extruded sorghum, rapeseed and Cobb feed controls
were given to groups of 25 Cobb broiler chicks each for 42 days with free
access to feed and water. Feed intake, body weight and feed conversion ratios
were recorded at 21 and 42d. Irradiation nor extrusion
affected chemical composition, but did
reduce tannins and phenols in sorghum and rapeseed meal. Extrusion reduced
molecular weight of protein subunits further than irradiation whereas
irradiation reduced the crystal structure of starch further than extrusion.
Electron microscopy confirmed the results. Irradiation and extrusion of feed
increased daily weight gain and improved feed conversion ratio compared with
controls.
Keywords: Keywords:
Broilers, Electron beam irradiation, Extrusion, Scanning Electronic microscope
(SEM), Rapeseed meal, SDS-PAGE, Sorghum, X-ray diffraction (XRD)
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