Herbal feed additives containing tannins: impact on in vitro fermentation and methane mitigation from total mixed ration

Authors : Manju WADHWA, Prabh Kaur SIDHU, Mohinder Pal Singh BAKSHI

Pages : 47-58

View : 9 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Total mixed ration insert ignore into journalissuearticles values(TMR); containing roughage and concentrate mixture in a 65: 35 ratio on dry matter insert ignore into journalissuearticles values(DM); basis was supplemented with herbal feed additives [insert ignore into journalissuearticles values(HFAs);; Acacia catechu insert ignore into journalissuearticles values(Katha);, Areca catechu insert ignore into journalissuearticles values(Supari);, and Acacia nilotica insert ignore into journalissuearticles values(Babul);] at 0-4% on DM basis to assess their impact on fermentation pattern and methane production by using in vitro gas production technique. Areca catechu had the highest insert ignore into journalissuearticles values(P < 0.01); concentration of condensed tannins insert ignore into journalissuearticles values(CTs);, saponins, and vitamin C as compared to other HFAs. The net gas production insert ignore into journalissuearticles values(NGP);, digestibility of NDF and true OM, and ME availability, partitioning factor insert ignore into journalissuearticles values(PF);, volatile fatty acids insert ignore into journalissuearticles values(VFAs);, and microbial biomass production were higher insert ignore into journalissuearticles values(P < 0.01); at 24 h as compared to t-half incubation, irrespective of type and level of HFAs supplemented. Acacia nilotica had an edge over Acacia catechu with respect to digestibility of nutrients and ME availability. VFAs production and efficiency of rumen fermentation was the highest from the Areca catechu-supplemented TMR. Irrespective of type of HFAs and incubation period, the digestibility of NDF and that of true OM were highest insert ignore into journalissuearticles values(P < 0.01); at the 1% level of supplementation, but depressed thereafter. Amongst HFAs-supplemented groups, VFA production and fermentation efficiency were highest at the 2% level. The results conclusively revealed that supplementing Areca catechu and Acacia nilotica at 2% of TMR insert ignore into journalissuearticles values(DM basis); inhibited the methane production, without affecting the fermentation pattern.
Keywords : Bio active compounds, herbal feed additives, hydrogen balance, in vitro, ME availability, methane emission