Document Type : Research Paper

Authors

1 , Islamic Azad university, Shar-e- Qods , Tehran, Iran

2 department of animal science, shahr-e-qods branch, islamic azad university

3 Department of Animal Science, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran

Abstract

The objective of this study was completed to evaluate the effects of electron beam irradiation (EBI) at doses of 20 and 40 kGy and infrared irradiation (IR) for 90 and 120 second on ruminal degradation of dry matter (DM) and crude protein (CP), and Metabolizable protein (MP) of safflower meal (SM) by nylon bags technique. Three ruminally fistulated Dashtyari cows with an average live weight of 297±10 kg were used. The result of experiment showed that chemical composition of SM was affected by radiations(P<0.01). EBI and IR increased rapidly degradable fraction (a) and slowely degradation fraction (b) of DM and CP (P<0.01). Effective degradability of DM and CP was increased by EBI and IR compared to untreated SM. IR increased rumen undegradable protein (RUP) at ruminal outflow rate 0.02, 0.05 and 0.08/h. The highest values of MP was observed by irradiation of SM with IR for 120 seconds (P<0.01). According to results of this study, irradiation of SM with IR for 120 seconds relative to other treatments had better effect on increasing of RUP and MP and improving of quality of safflower meal.

Keywords

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