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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Above-ground biomass of Argyrocytisus battandieri Maire in the range lands of the Moroccan tabular Middle Atlas. Prediction and effect of the grazing pressure
Auteurs :	M. Bakkali, Auteur ; M. Barbero, Auteur ; M. Qarro, Auteur ; A. Zine El Abidine, Auteur ; A. Ouijja, Auteur ; M. Ezzahiri, Auteur ; B. Belghazi, Auteur ; M. Diouri, Auteur
Type de document :	Article
Dans :	Ecologia Mediterranea (28(1) 2002)
Article en page(s) :	19-30
Résumé :	Above-ground biomass of Argyrocytisus battandieri Maire in the range lands of the Moroccan tabular Middle Atlas. Prediction and effect of the grazing pressure. In the central Middle Atlas, epigeal biomass of the livestock-appreciated forage shrub Argyrocytisus battandieri Maire was assessed, based on dendrometric and weight data of 251 shrub individuals. Simple and multiple regressions were applied to the data in order to estimate wood and leaves biomass in this species.The data analysis allows us to conclude that:- its possible to estimate the dry biomass of the stems based on basal diameter;- the combination of stems count, maximal height and mean diameter of the shrub, is the best estimate of its dry biomasses;- allometric models for the stems and the shrubs fit better the biomass data;- average laburnum total dry biomass is 2.2 t/ha, and was composed of 2.0 t/ha of wood and 0.2 t/ha of leaves.An intensive grazing pressure lead to the species' destruction. A medium grazing pressure on a basaltic substratum is significantly propitious to the production of the shrub, in comparison with stations protected by exclosure.

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