Resumen

LOPEZ-MERLIN, David; SOTO-PINTO, Lorena; JIMENEZ-FERRER, Guillermo  y  HERNANDEZ-DAUMAS, Salvador. Relaciones alométricas para la predicción de biomasa forrajera y leña de acacia pennatula y guazuma ulmifolia en dos comunidades del norte de chiapas, méxico. INCI [online]. 2003, vol.28, n.6, pp.334-339. ISSN 0378-1844.

Acacia pennatula (Schltdl. & Cham.) Benth. and Guazuma ulmifolia Lam. are important species used as forage and fuel wood in dry and sub-humid tropics. Nevertheless, the relation between fuel wood, forage and allometric variables is unknown. Allometric models were fitted to predict forage accumulation and fuel wood for these species in secondary vegetation, in two localities in Northern Chiapas, Mexico. During March 2001 a homogenization pruning was practiced to 23 trees of each species, and fuel wood was quantified. Forage production was calculated through the sprout harvest six months after pruning. Forage dry matter production was estimated through several models, using allometric variables such as: basal diameter (bd), breast height diameter, stump volume, number of sprouts per tree (nst), sprout length, sprout basal diameter (sbd). Fuel wood dry matter production for both species was related to bd. For A. pennatula forage dry matter was predictable with nst (cubic model), G. ulmifolia forage was predictable with bd (lineal model), fuel wood weight was predictable with bd for both species (potential model). These allometric models permit the estimation of forage and fuel wood in similar conditions to those of the studied area.

Palabras clave : Alometría ; Biomasa ; Forraje ; Leña ; Acacia pennatula ; Guazuma ulmifolia .