Anacardic Acid Isolated From Cashew Nut Shell (Anacardium occidentale) Affects Methane and Other Products in the Rumen Fermentation
Abstract: Biofat is a hexane
extract containing several bioactive compounds with anacardic acid as the major
compound. This study aimed to examine the effect of anacardic acid on rumen
fermentation, especially methane and its degradation in the in vitro rumen
fermentation. The study was arranged in a completely randomized block design.
The treatments were control (substrate or complete feed), biofat (substrate +
0.75 uL/mL biofat), and anacardic acid (substrate + 0.75 uL/mL anacardic acid).
Measured variables were total gas production, methane, pH, concentration of
ammonia (NH3), dry matter degrability (DMD), organic matter degrability (OMD),
and neutral detergent fiber degrability (NDFD) in the rumen. The chromatogram
GC-MS analysis results indicated that the anacardic acid isolation process of
the biofat produced nearly pure isolate (99.44%), and significantly decreased
the production of methane by 51.21% and 39.62%, respectively. Anacardic acid
degradation pattern in the in vitro rumen test showed a shifting of retention
factor (Rf) value after anacardic acid being incubated with the degradation of
anacardic acid occurred after 24 h of fermentation. In conclusion, anacardic
acid isolated from biofat has a dominant role to reduce the in vitro methane
production. Anacardic acid is very potential to be used as a methane reducing
agent.
Keywords: anacardic; cashew
nut sell; methane; rumen fermentation
Author: A. Saenab, K. G.
Wiryawan, Y. Retnani, E. Wina
Journal Code: jppeternakangg170050
