Four Thai native bulls were used to evaluate the availability of mother liquor (ML), by-product of monosodium glutamate, as a replacement of soybean meal (SBM) consisting of 10% in concentrate. The SBM was replaced by the ML at 0% (C), 20% (T1), 40% (T2), and 60% (T3), and the experiment was a randomized block design experiment. The animals were fed concentrate and roughage (60:40, on a dry matter [DM] basis). There were no significant differences in the digestibility of DM, crude protein, ether extract, acid detergent fiber expressed exclusive of residual ash and non-fibrous carbohydrate, and energy and nitrogen balances among the treatments. However, the digestibility of the neutral detergent fiber in T2 was lower than the other treatments (p <.05). The valeric acid of T2 was lower than those of C and T1 and the iso-valeric acid of T3 was the lowest (p <.05), followed by those of T2, T1, and C at 4 hr post-feeding. No significant differences were observed in the ruminal total VFA concentrations, pH, and NH3-N among the treatments. These results suggested that SBM could be replaced by the ML up to 60% without adverse effects on nitrogen and energy balance, rumen conditions, and blood metabolites in Thai native bulls.
- energy and nitrogen balances
- mother liquor of monosodium glutamate
- ruminal fermentation
- Thai native cattle
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)