%0 Journal Article
%T Estimaci車n de la biomasa foliar de Prosopis flexuosa mediante relaciones alom谷tricas Estimation of leaf biomass in Prosopis flexuosa by means of allometric relationships
%A M. Ledesma
%A C.A. Carranza
%A M. Balzarini
%J Agriscientia
%D 2010
%I 
%X La estimaci車n alom谷trica de la biomasa foliar arb車rea es necesaria para determinar la producci車n primaria y para analizar algunas de las interacciones ecol車gicas entre los 芍rboles y los dem芍s componentes de la vegetaci車n. El objetivo del trabajo fue ajustar y seleccionar modelos para estimar la biomasa foliar de Prosopis flexuosa a partir de variables dendrom谷tricas. Se apearon seis 芍rboles, se midi車 su di芍metro y se calcul車 el 芍rea de albura de muestras transversales de le o, en cuatro niveles: en los 車rdenes de ramificaci車n dentro de la copa viva (ramas secundarias, terciarias y cuaternarias agrupadas), en el extremo distal de las ramas primarias y en los extremos distal y basal del fuste. Se recolectaron las hojas correspondientes a cada nivel y se obtuvo el peso seco. El 芍rea de albura fue la mejor variable predictora de biomasa foliar, aunque el di芍metro tuvo buen ajuste en ramas dentro de la copa viva y en ramas primarias. Los modelos calculados con variables de fuste tuvieron menor ajuste. Se concluye que para la estimaci車n no destructiva de la biomasa foliar de plantas adultas de Prosopis flexuosa es recomendable utilizar el modelo basado en el di芍metro distal de las ramas primarias. The estimation of leaf biomass, usually performed by alometric relations, is important for the interpretation of primary production and for the assessment of ecological interactions between trees and the rest of the components in a wood vegetation. The goal for the present work was to adjust and to select allometric models for the estimation of leaf biomass Prosopis flexuosa based on dendrometric variables. Six trees were surveyed. The diameter and sapwood area of transversal samples of wood were determined at four different levels: in the orders of ramification within living crown (secondary, tertiary and quaternary grouped branches), at the distal portions of primary branches and in the apical and basal portions of bole. The leaves were collected according to each level and dry mass was obtained. The sapwood area was the best predictor of leaf biomass, although diameter provided accurate estimations within crown and at the distal portions of primary branches. The models based on trunk dimensions were less precise. It is concluded that the obtained regression model based on the diameter of the distal portions of primary branches can be applied for the non-destructive estimation of leaf biomass in Prosopis flexuosa adult trees.
%K Alometr赤a
%K Peso hojas
%K Di芍metro del tallo
%K 芍rea de albura
%K Allometry
%K Leaf weight
%K Stem diameter
%K Sapwood
%U http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2010000200004