Biomasa en plantaciones de <i>Eucalyptus viminalis </i>Labill. de la provincia de Buenos Aires, Argentina.

Abstract

RESUMENEl presente trabajo se desarrolló en el oeste de la provincia de Buenos Aires, Argentina con el objetivo de ajustar funciones de biomasa de árboles individuales y determinar la biomasa en diferentes compartimientos de la planta y el sotobosque. Se identificaron rodales de Eucalyptus viminalis Labill. cuyas edades oscilaron entre 4 y 14 años. Se apearon 21 árboles con diámetros entre 9,2 y 32,5 cm. Se desarrollaron regresiones simples y múltiples y se estimó el volumen, la biomasa en ramas, hojas y fuste. Las ecuaciones de volumen de mejor comportamiento son basadas en modelos lineales en su forma normal, y el modelo más adecuado fue el que incorporó al d 2 (R 2 = 0,92). Para la estimación de la biomasa en hojas, ramas, copa y fuste se recomienda los modelos ln-ln que consideran el d y h o solo el d. El componente de la biomasa en hojas presentó una estimación más débil. La distribución de la biomasa en los individuos sigue el patrón de desarrollo que se encuentra en la bibliografía. La proporción de la biomasa en la copa disminuye con la edad, contrariamente a lo sucedido con el fuste. Palabras claves: modelos de biomasa; modelos de volumen; Eucalyptus; región semiárida. ABSTRACTThe present work was developed in the West of Buenos Aires Province (Argentina) with the objective of adjusting functions of biomass of individual trees, in their different compartments and in the understorey. Stands of Eucalyptus viminalis Labill. were identified, with ages between 4 and 14 years-old. Twenty-one individuals were felled with diameters ranging from 9,2 to 32,5 cm. Simple and multiple regression models were developed and volume, branch leaf and stem biomass were estimated. The best volume equations were based on lineal models and the most adequate behavior was obtained with d 2 . To estimate leaf, branch and stem, ln-ln models have been suggested, with diameter and h or only diameter. The leaf biomass presented the weakest adjustment. The distribution of trees biomass agrees with the bibliography. The proportion of crown biomass decreases with age; on the other hand, the proportion of stem biomass increases with age.

Wood density and anatomy of three Eucalyptus species: implications for hydraulic conductivity

“…It has great tolerance to drought and frost stress. In Argentina (west of Buenos Aires province), it shows a MAI of around 25 m 3 ha -1 year -1 (Ferrere et al, 2008). The aim of conducting this study was to characterize stem wood anatomy (morphometric characteristics of vessels and fibers) of the three Eucalyptus species mentioned above, and to examine the relationship between anatomical features, as described by Zanne et al (2010), and wood density with hydraulic efficiency as estimated by theoretical hydraulic conductivity (Ks).…”

STAND DENSITY MANAGEMENT DIAGRAMS OF Eucalyptus viminalis: PREDICTING STEM VOLUME, BIOMASS AND CANOPY COVER FOR DIFFERENT PRODUCTION PURPOSES

“…The data used to develop the SDMD were obtained from 161 plots, all established in Buenos Aires province ( Figure 1). Some of these data are unpublished (37 plots), but other come from the original database that supports the following publications: Caccia et al (1991;n=14 plots), Ferrere et al (2008;n= 22 plots), Ferrere et al (2014; n=72 plots), Milione (2019; n=16 plots). Because some of these data were not digitalized before this study or the published articles or reports are written in Spanish, we include the data in the Appendix A.…”

Effect of planting density and tree species selection on forest bioenergy systems: tree growth, nutrient storage and wood chemical properties

“…that of branches that showed no differentiation between 12 and 24 months regardless of planting density; (iv) at 3 months, no differences in aerial biomass were found between planting densities; (v) after 12 months, the density of 10 000 trees ha − The biomass distribution pattern is similar to that reported by Tenorio 19 and Ferrere. 26 The short-rotation plantation tends to accumulate 60% of the biomass in the trunk, to a lesser extent in branches and leaves; this behavior is due to a nutritional optimization of the species. Most of the synthesis of sugars and amino acids focuses on the growth of the central axis, so the stem accumulates most of the biomass, while the leaves increase the size of the leaf lamina in order to increase photosynthetic efficiency, a fundamental aspect for species survival.…”