Comparison of electron beam and gamma ray irradiations effects on ruminal crude protein and amino acid degradation kinetics,and in vitro digestibility of cottonseed meal |
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| Authors: | F Ghanbari T Ghoorchi P Shawrang H Mansouri NM Torbati-Nejad |
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| Institution: | 1. Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resources, P. O. Box 386, Gorgan, Iran;2. Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, Atomic Energy Organization of Iran, P. O. Box 31485-498, Karaj, Iran;3. Animal Science Research Institute, P. O. Box 1483, Karaj, Iran;1. Wageningen Livestock Research, PO Box 338, 6700 AH Wageningen, The Netherlands;2. Animal Nutrition Group, Wageningen University & Research, PO Box 338, 6700 AH Wageningen, The Netherlands;3. Agrifirm Innovation Center, Royal Dutch Agrifirm Group, PO Box 20018, 7302 HA Apeldoorn, The Netherlands;4. Laboratory of Food Chemistry, Wageningen University & Research, PO Box 17, 6700 AA Wageningen, The Netherlands;5. CREOL/OLEAD, 33600 Pessac, France;6. Terres Inovia, 33600 Pessac, France;1. Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, T6G 2P5, Canada;2. Alberta Agriculture and Rural Development, Edmonton, Alberta, T6H 5T6, Canada;2. Animal Nutrition Group, Wageningen University, De Elst 1, 6708 WD, Wageningen, the Netherlands;1. Novozymes A/S, Krogshoejvej 36, 2880 Bagsvaerd, Denmark;2. Copenhagen University, Denmark |
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| Abstract: | This study was conducted to compare effects of electron beam (EB) and gamma ray (GR) treatments at doses of 25, 50 and 75 kGy on ruminal degradation kinetics of crude protein (CP), amino acid (AA), and in vitro digestibility of cottonseed meal (CSM). Ionizing radiations of EB and GR had significant effects (P<0.05) on CP and AA ruminal degradability characteristics of CSM. Effective ruminal degradability (ERD) of CP was lower in EB and GR irradiated CSM (P<0.05) than in unirradiated CSM. GR and EB treatments had the same effects on ERD decreasing of CP (P>0.05). Irradiation processing caused decrement in AA degradation after 16 h of ruminal incubation (P<0.05). EB irradiation was more effective than GR irradiation in lessening the ruminal degradability of AA (P<0.05). EB and GR treatments at a dose of 75 kGy increased in vitro digestibility of CSM numerically. This study showed that EB could cause CP and AA bypass rumen as well as GR. Therefore, ionizing irradiation processing can be used as an efficient method in improving nutritional value of CSM. |
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