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Information Journal Paper

Title

Effects of irradiation on ruminal protein degradation and in vitro digestibility of sunflower meal

Author(s)

 Aminy Esfid Vajani Habib | FATTAH AMIR | Ebrahimi Mahmoudabad Seyed Rohollah | Issue Writer Certificate 

Pages

  17-33

Abstract

 Background and Objectives: The imbalance between the production of rumen degradable protein (RDP) and microbial protein (MP) decreases animal performance and increases environmental pollution. Therefore, to meet the requirements for microbial protein without excessive N, rations must also be balanced for RUP and RDP. Sunflower meal (SFM) is a protein source for ruminants. However, its use in ruminant nutrition is often limited by the high protein degradability in the rumen. Irradiation is a new method that is considered in the processing of protein sources. The aim of this study was to investigate the effect of irradiation on rumen degradation kinetics and in vitro digestibility of SFM. Materials and Methods: SFM samples were irradiated with the use of the gamma-ray (GR) in doses of 20 and 40 KGy and microwave (MV) at 800 W for 3 and 5 minutes. The irradiation of samples was done at the Radiation Application Research Institute affiliated with the Atomic Energy Organization. The chemical composition of unirradiated and irradiated SFM was determined. Degradability parameters of the samples were measured by nylon bag technique using three rumen-fistulated Dashtyari cattle for 0, 2, 4, 8, 16, 24, and 48 hours. The two-step digestion technique was used to determine the digestibility of SFM. Statistical analysis of data was performed using SAS software. Results: GR irradiation decreased DM of SFM. Irradiation of SFM caused a reduction in EE, NDF, ADF, and Ash and increased CP compared to unirradiated SFM. GR irradiation decreased washout fraction degradation, the rate constant of degradation of b fraction and ERD, and increased potentially degradable fraction of SFM. MV irradiation for 5 minutes increased the washout fraction of CP and decreased the potentially degradable fraction (P<0. 05). Treatment of SFM by MV for 5 minutes caused a reduction in the potential degradability of CP (P<0. 01). Processing of SFM with MV for 3 minutes decreased ERD of CP at a rumen outflow rate of 0. 02h-1 (P<0. 05). GR irradiation decreased RDP and increased RUP and metabolizable protein (MP) (P<0. 01). Irradiation of SFM with GR increased ERD of CP at rumen outflow rates of 0. 05h-1 and -1 0. 08h (P<0. 01). Irradiation of SFM with MV increased RDP (P<0. 01) and increased ERD and MP at a rumen outflow rate of 0. 02h-1 (P<0. 01). MV irradiation for 3 minutes at rumen outflow rates of 0. 02h-1 -1 and 0. 05h increased RUP (P<0. 05). The coefficient of crude protein conversion into RDP and RUP in GR-irradiated SFM was decreased and increased respectively (P<0. 01). MV irradiation for 3 minutes at rumen outflow rate of 0. 02h-1 coefficient of crude protein converts into RDP and RUP decreased and increased respectively (P<0. 05). The in vitro digestibility of SFM was unaffected by irradiation (P>0. 05). Conclusion: The experiment results indicated that irradiation of SFM with GR had a better effect on increasing RUP and improving the quality of SFM for use in diets of lactating cows.

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    APA: Copy

    Aminy Esfid Vajani, Habib, FATTAH, AMIR, & Ebrahimi Mahmoudabad, Seyed Rohollah. (2022). Effects of irradiation on ruminal protein degradation and in vitro digestibility of sunflower meal. JOURNAL OF RUMINANT RESEARCH, 10(1 ), 17-33. SID. https://sid.ir/paper/1058075/en

    Vancouver: Copy

    Aminy Esfid Vajani Habib, FATTAH AMIR, Ebrahimi Mahmoudabad Seyed Rohollah. Effects of irradiation on ruminal protein degradation and in vitro digestibility of sunflower meal. JOURNAL OF RUMINANT RESEARCH[Internet]. 2022;10(1 ):17-33. Available from: https://sid.ir/paper/1058075/en

    IEEE: Copy

    Habib Aminy Esfid Vajani, AMIR FATTAH, and Seyed Rohollah Ebrahimi Mahmoudabad, “Effects of irradiation on ruminal protein degradation and in vitro digestibility of sunflower meal,” JOURNAL OF RUMINANT RESEARCH, vol. 10, no. 1 , pp. 17–33, 2022, [Online]. Available: https://sid.ir/paper/1058075/en

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