Preliminary assessment of soil and floristic characteristics of degraded steppes of white armoise rehabilitated by the planting of Atriplex in the region of Sa?da (western Algeria) [évaluation préliminaire des caractéristiques édaphiques et floristiques des steppes à armoise blanche dégradées réhabilitées par la plantation d'Atriplex dans la région de Sa?da (Algérie occidentale)]

摘要

This study consist in performing a preliminary assessment of soil and floristic properties of degraded steppes of white wormwood in the region of Sa?da (western Algeria), rehabilitated by the planting of Atriplex halimus subsp. schweinfurthii and Atriplex canescens. The results show the adaptation of these two species to edaphic and climatic conditions of the study area with a success rate above 80%. Compared to the non rehabilitated perimeter (control), in the perimeters where the two species of Atriplex were introduced, we note improved recovery rate of vegetation, phytomass, thickness and humidity of soil. However, a slight increase of soil salinity characterizes the perimeter of Atriplex canescens. The plant inventory indicates a similar specific diversity in the three explored perimeters.