Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 9(5): 655-661
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Dewi Muthia1,4, Muhammad Ridla2, Erika B. Laconi2, Roni Ridwan3, Rusli Fidriyanto3, Mohammed Abdelbagi1, Rakhmad P. Harahap5, Anuraga Jayanegara2*

1Study Program of Nutrition and Feed Science, Graduate School of IPB University, Bogor 16680, Indonesia; 2Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Bogor 16680, Indonesia; 3Research Center for Biotechnology-LIPI, Jl. Raya Bogor KM 46 Cibinong 16911, Indonesia; 4Animal Husbundry Production Study Program, Agricultural Polythecnic of Payakumbuh, Tanjung Pati, Sumatera Barat, 26271, Indonesia; 5Study Program of Animal Science, Faculty of Agriculture, Tanjungpura University, Jalan Prof. Dr. H. Hadari Nawawi, Pontianak 78124, Indonesia

Abstract | The study was conducted to investigate the effects on the in-vitro rumen fermentation characteristics of rice straw of ensiling, urea treatment, and autoclaving . The treatments consisted of untreated rice straw (P1) compared to the ensiling of rice straw using anaerobic conditions for 30 days (P2), treatment with 3% urea solution (P3), autoclaving at 150o C and 1.2 atm for 60 minutes (P4), combination of ensiling with urea (P5), ensiling with autoclaving (P6), and combination ensiling, urea treatment, and autoclaving (P7). None of the treatments showed significant differences in neutral detergent fibre (NDF) or volatile fatty acid (VFA) content, but did produce significant differences (P < 0.05) in dry matter (DM), organic matter (OM), acid detergent fibre (ADF), pH, NH3, gas production, methane gas, in-vitro dry-matter digestibility (IVDMD) and in-vitro organic-matter digestibility (IVOMD). The ensiling process had no effect on protein value, IVOMD, or methane gas production. Gas production from all the treatment samples was low up to 12 h but increased at 24 h and 48 h of in-vitro incubation. Rice straw samples ensiled in combination with urea (P5) and autoclaving (P6) had the highest gas production at 48 h. Methane gas production was higher (P < 0.05) in P2, P3, P5, and P6 samples than the rest. Overall, this study concludes that the ensiling process can maintain the quality of rice straw, including in combination with added urea and autoclaving.

Keywords | Rice straw, Ensiling, Urea, Autoclaving, In-vitro characteristics