Contribution à la caractérisation de la flore adventice dans un périmètre agricole

Abstract

Le présent travail consiste en une étude de la flore adventice d’une zone agricole : Hassi Ben Abdellah. Pour ce fait cinq stations ont été retenues une palmeraie, un plein champ, et un sous abris serres (1, 2,3,), sous centre pivot et une zone naturelle. Cette contribution a pour but d’inventorier la flore dans ces stations; ainsi que de caractériser le couvert floristique, aussi bien pour la flore spontanée qu’adventice. L’étude qualitative des adventices dans les différentes stations a permis de recenser 82 espèces réparties sur 30 familles botaniques. Il ressort de l’analyse des inventaires que les Poaceae et les Asteraceae sont les familles les plus représentées.

This work consists on a survey of weed adventitious flora of an agricultural zone: Hassi Ben Abdelah. For this, 05 stations have been kept: palm grove, full field (field grove), greenhouses (1, 2,3,), pivot and a natural zone, in The ITDAS perimeter of Ouargla region. This contribution has for goal to inventory flora in these stations; as well as to characterize the flora table setting floristique and spontaneous. The qualitative survey of adventitious of the stations has permitted to count 82 species that are distributed on 30 botanic families. It seems that Poaceaes and Asteraceaes are the more represented families. The quantitative survey of the species has permitted to note the abundance of Poaceaes. The palm grove is the richest in adventitious follow-up by the full field,then greenhouses and then the pivot. The natural zone is the richest in spontaneous, where near half of species don't exist in the same way in the other stations. And all species existing in cultivated stations doesn't exist in the natural zone; these species are introduced by anthropic action. From this study, it seems that there is a pressure gradient of impoverishment and enrichment of species according to the age of the setting in culture of the station.