Effect of cashew nut shell liquid on metabolic hydrogen flow on bovine rumen fermentation.
Effect of cashew nut shell liquid (CNSL), a methane inhibitor, on bovine rumen fermentation was investigated through analysis of the metabolic hydrogen flow estimated from concentrations of short-chain fatty acids (SCFA) and methane. Three cows were fed a concentrate and hay diet without or with a CNSL-containing pellet. Two trials were conducted using CNSL pellets blended with only silica (trial 1) or with several other ingredients (trial 2). Methane production was measured in a respiration chamber system, and energy balance and nutrient digestibility were monitored. The estimated flow of metabolic hydrogen demonstrated that a part of metabolic hydrogen was used for hydrogen gas production, and a large amount of it flowed into production of methane and SCFA in both trial 1 and 2, when CNSL was administered to the bovine rumen. The results obtained by regression analyses showed that the effect of CNSL supply on methane reduction was coupled with a significant (P < 0.01) decrease of acetate and a significant (P < 0.01) increase of propionate and hydrogen gas. These findings reveal that CNSL is able to reduce methane and acetate production, and to increase hydrogen gas and propionate production in vivo.
['Mitsumori|Makoto|M|', 'Enishi|Osamu|O|', 'Shinkai|Takumi|T|', 'Higuchi|Koji|K|', 'Kobayashi|Yosuke|Y|', 'Takenaka|Akio|A|', 'Nagashima|Kyo|K|', 'Mochizuki|Masami|M|', 'Kobayashi|Yasuo|Y|']
D031021:Anacardium D000821:Animal Feed D000818:Animals D002417:Cattle D005232:Fatty Acids, Volatile D005260:Female D005285:Fermentation D006859:Hydrogen D008697:Methane D011422:Propionates D012417:Rumen
cashew nut shell liquid metabolic hydrogen rumen methane hydrogen gas