Effect of Fodder Tree Species with Condensed Tannin Contents on <i>In vitro</i> Methane Production

Abstract

The objective was to evaluate the effect of fodder tree species (FTS) with condensed tannin contents: Cordia elaeagnoides, Platymiscium lasiocarpum, Vitex mollis, and Haematoxylon brasiletto, on in vitro methane (CH4) production at 24 h post incubation. The analysis was performed using the in vitro gas production technique, with three levels of inclusion/species: 600, 800, and 1,000 mg and with 4 replicates/species/level of inclusion. The substrate was incubated at 39°C, and the gas and CH4 production were recorded at 4, 8, 12, and 24 h post incubation. The data collected was analyzed through Pearson correlation, polinomial regression and fixed effects models. There were negative correlations between FTS-total gas volume (r = −0.40; p<0.001); FTS-volume of CH4 produced (r = −0.40; p<0.001) and between the inclusion level-volume of CH4 produced (r = −0.20; p<0.001). As well as a positive correlation between hours post incubation-total gas volume (r = 0.42; p<0.001) and between hours post incubation-volume of CH4 produced (r = 0.48; p<0.001). The FTS: C. elaeagnoides, V. mollis, and H. brasiletto have potential, in the three inclusion levels analyzed, to reduce CH4 emission on in vitro trials (>32.7%), taking into account the total CH4 production at 24 h of the forage used as reference (Avena sativa). It’s suggested that C. elaeagnoides-according to its crude protein, neutral detergent fiber, and condensed tannins content- is the best alternative within the FTS analyzed, for feeding ruminants and for the control of CH4 emissions during the dry season.

Lambs fed cassava silage with added tamarind residue: Silage quality, intake, digestibility, nitrogen balance, growth performance and carcass quality

“…There was a reduction of mt (ml/g DM) of 0.16 mL with the inclusion of 100 g/kg tamarind residue in the cassava silage. The decrease can be explained by the increase in tannins in the residue complexing with proteins, which may reduce the availability of nutrients for fermentation and consequently depress the rate of carbohydrate degradation (Vázquez et al, 2016;Wang et al, 2016). This fact also explains the reduction that occurred in DMD in vitro.…”

Supplemental Effect of Condensed Tannins From Sengon Leaves (Albizia Falcataria) on in Vitro Gas and Methane Production

“…Nonetheless, the voluntary intake will decrease if the intake of condensed tannins is above 7% of the dry matter (DM). Moderate intake of condensed tannins (3-6% of DM ratio) may also lead to positive responses (Vázquez et al, 2016).…”