The Effects of Monosodium Glutamate by Product Treated Rice Straw in Total Mixed Rations on Rumen Fermentation and Ruminal Microbial Populations Using an In Vitro Gas Technique
The Effects of Monosodium Glutamate by Product Treated Rice Straw in Total Mixed Rations on Rumen Fermentation and Ruminal Microbial Populations Using an In Vitro Gas Technique
Suparada Saphaphan, K. Teepalak Rangubhet, Phongthorn Kongmun*
ABSTRACT
This study aimed to investigate the effects of monosodium glutamate by-product-treated rice straw (MSGBTRS) as a roughage source in total mixed rations (TMR) on rumen fermentation and microbial ecology using an in vitro gas production technique. Four treatments, Pangola grass hay (PH), rice straw (RS), MSGBTRS, and 3.5% urea-treated rice straw (UTRS), were mixed thoroughly with the concentrated feed ingredients to make TMR at a ratio of 60:40. Treatments were assigned in a completely randomized design. Results showed that cumulative gas production at 72 h was significantly higher (P<0.05) in the MSGBTRS treatment, while PH exhibited the lowest value (P<0.05). Additionally, in vitro dry matter digestibility (IVDMD) at 24 and 48 h was highest in the 3.5% UTRS treatment (P<0.001), while that in the MSGBTRS treatment was comparable to PH. The concentrations of ammonia nitrogen (NH3-N) and total volatile fatty acids (VFA) showed no significant differences across the treatments. The populations of total ruminal bacteria and cellulolytic bacteria did not show significant differences among treatments. In conclusion, the utilization of MSGBTRS as a roughage source in TMR can effectively replace 3.5% UTRS as well as PH, as shown by the lack of significant differences in the results of rumen fermentation, dry matter digestibility, and ruminal microbial population analysis.
Keywords | Total mixed rations, Rice straw, MSGB-treated rice straw, In vitro gas production technique, Goats
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June 2024
Vol. 12, Iss. 6, pp. 994-1205
