Keywords:
catechin
gambier (Uncaria gambir) leaf
methane reduction
nutrient digestibility
sustainable feed additives

  • Abstract

    This study investigated the potential of gambier leaf catechins sourced from the Talang Maur region, Indonesia, as novel feed additives for improving nutritional efficiency and reducing methane emissions in ruminants. Gambier leaves, which are rich in catechins, exhibit antioxidant and antimethanogenic properties and can serve as effective defaunation agents. A randomized group design was used. There were four treatments and four replicates: T0 (control ratio), T1 (0.5% gambier leaf extract + 0.357% catechins), T2 (1% gambier leaf extract + 0.713% catechins), and T3 (2% gambier leaf extract + 1.43% catechins). In this study, nutrient digestibility, rumen characteristics, microbial protein synthesis, microbial biomass, protozoan population, and total gas and methane production were measured. The results were significantly improved (P < 0.05) for most of the parameters except for the rumen pH (P>0.05), which remained stable at 6.91. In the T3 treatment, methane production decreased significantly to 6.09 mL/g DOM, and the protozoa population was reduced to 4.88 Log 10 cells/mL. Moreover, the microbial synthesis of protein and microbial biomass were significantly lower (P<0.05) at 18.58 mg/100 mL and 2.15 mg/mL, respectively. The VFA and NH3 concentrations increased to 155.13 mM and 15.69 mg/100 mL, respectively. The dry matter, organic matter and crude protein digestibilities also improved to 64.70%, 65.50% and 60.52%, respectively. In conclusion, gambier leaf catechins effectively reduce methane emissions and improve nutrient digestibility in ruminants. These results underscore the potential of locally sourced gambier leaves as environmentally sustainable feed additives and promote the efficiency and sustainability of ruminant production.

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How to cite

Pazla, R., Antonius, Jamarun, N., Elihasridas, Arief, Ikhlas, Z., Yanti, G., Ardani, L. R., Fitri, Y., & Hidayat, M. Z. (2025). Gambir leaf catechins as potential natural feed additives to improve digestibility and mitigate methane emissions in ruminants. Journal of Animal Behaviour and Biometeorology, (| Accepted Articles). Retrieved from https://malque.pub/ojs/index.php/jabb/article/view/8142
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