Resumen

OROZCO-DURAN, Karlos Edmundo et al. In vitro ruminal methanogenesis reduction with vegetable oils Thevetia peruviana and Persea americana. Ecosistemas y recur. agropecuarios [online]. 2016, vol.3, n.9, pp.335-344. ISSN 2007-901X.

The effect of adding different proportions 0, 1, 2, 3, 4, 5 y 6 % of Thevetia peruviana (TP) and avocado fruit Persea americana (AG) seed oils, was evaluated over gas production (GP), methane (CH4) dry matter digestibility (IVDMD) and neutral detergent fiber digestibility (IVDNDF) in a cultured bovine rumen fluid system. For data analysis a lineal model of orthogonal contrasts was used. Finding an effect of both oils (P < 0.001) over GP from 4 % inclusion, with an average production of 220 cm3. In the methane production, a decrease from 3 % inclusion was found in both treatments (P < 0.0001), with a linear and quadratic effect when the oils doses were increased. The IVDMD of control treatment was 67.2 %, significantly decreasing from levels 4, 5 and 6 % in both treatments, IVDNDF showed a similar trend, declining significantly in both treatments from 4 % inclusion in both oils. For all the evaluated variables an effect of the inclusion level was found, but not an effect related to the type of oil. The 3 % of TP and AG oil supplementation reduces CH4 production without affecting gas production, either forage digestibility, so this level could be the more appropriate to evaluate its potential in vivo conditions.

Palabras llave : Fatty acids; avocado; yellow oleander; ruminants; climate change.

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