Resumo

MANZANO MENDEZ, Filemón; VALDEZ HERNANDEZ, Juan Ignacio; LOPEZ LOPEZ, Miguel Ángel  e  PINEDA HERRERA, Elizandro. Aboveground biomass of Zanthoxylum kellermanii P. Wilson in a tropical evergreen forest at the North of Oaxaca State. Rev. mex. de cienc. forestales [online]. 2016, vol.7, n.33, pp.40-51. ISSN 2007-1132.

Zanthoxylum kellermanii is a species of ecological and economic value in southeast Mexico, in particular in the Chinantla region of Oaxaca State. In order to generate the equations that determine its aboveground biomass, two trees by diametric class (10, 15, 20 and 25 cm) were felled, dividing each of them into three sections: foliage, branches and stem. From each section samples were taken and weighed directly to determine fresh weight and later they were dried in kilns. With these data the relationship between fresh weight and dry weight was established to estimate values of biomass per tree compartments and the total for each category, adjusting allometric equations by nonlinear regression techniques. The values of biomass per tree ranged from 0.494 to 2.14 kg in foliage, 1.74 to 25.9 kg in branches and 7.6 to 206.72 kg in stems. The average proportion of the biomass was 83 % in stems, branches and 14 % in 3 % in foliage. Allometric equations generated for Z. kellermanii showed a good level of fit, determined by their statistical values, so that the model is reliable to make a good prediction of biomass through the normal diameter. The distribution pattern of biomass, relative to the total dry weight indicates that this species has the greatest potential to accumulate biomass in the stem.

Palavras-chave : Aboveground biomass; allometric equations; foliage; stem; Oaxaca; branches.

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