%0 Journal Article %T Evaluaci¨®n de vainas y hojas de ¨¢rboles forrajeros por la t¨¦cnica de producci¨®n de gas in vitro %A Hern¨¢ndez Hern¨¢ndez %A Jorge Ezequiel %A Franco Guerra %A Francisco Javier %A Camacho Ronquillo %A Julio Cesar %A Villarreal Espino Barros %A Oscar Agust¨ªn %A Pedraza Olivera %A Redimio Manuel %A Plata P¨¦rez %A Fernando Xicotencatl %A Mendoza Mart¨ªnez %A Germ¨¢n David %J Zootecnia Tropical %D 2010 %I Instituto Nacional de Investigaciones Agr¨ªcolas Venezuela %X the kinetics of in vitro gas production to achnowledge the nutritional potential of tree leaves and pods that grow in a dry tropical area of mexico using bovine faeces as inoculum, compared with guinea grass (panicum maximum) as reference was studied. leaves and pods were collected from: prosopis laevigata, pithecellobium dulce and pithecellobium acatlense; and only leaves from: amelanchier denticulata, verbesiana crocata, haemotoxylum brasiletto, acacia bilimekii, acacia pennatula, acacia constricta and lantana velutina. the inoculums were prepared with fresh bovine faeces dissolved in water in 1:3 ratio. parameters estimated were the maximum gas production (v), the production rate (s) and the lag phase (l). three species showed low gas values (8,34-11,4 ml) while most were close to those of guinea grass (29 ml) with a similar production rate (0,03 h-1). in the pods, with exception of pithecellobium acatlense, the others presented a higher gas production (33,8-46,3 ml) than guinea grass (25,6 ml) with a rate of production similar o greater (0,03 a 0,06 h-1). the results indicate that the pods of prosopis laevigata and pithecellobium dulce have nutritional value superior to that of guinea grass while leaves from haemotoxylum brasiletto and prosopis laevigata have a similar value. the gas production technique in vitro allows the estimation of the potential value of non-conventional feed resources %K fodder trees %K in vitro gas production %K leaves %K pods %K inoculums. %U http://www.scielo.org.ve/scielo.php?script=sci_abstract&pid=S0798-72692010000300013&lng=en&nrm=iso&tlng=en