La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Experimental study of competition between the weed Diplotaxis harra (Forssk.) Boiss. and barley (Hordeum vulgare var. Ardhaoui)
Auteurs :	Tahar Tlig, Auteur ; Mustapha Gorai, Auteur ; Mohamed Neffati, Auteur
Type de document :	Article
Dans :	Ecologia Mediterranea (38(1) 2012)
Article en page(s) :	89-95
Résumé :	Interspecific competition between the weed Diplotaxis harra (Forssk.) Boiss. and barley (Hordeum vulgare var. Ardhaoui) was studied in pots. Seeds of D. harra were sown in pots in association with the barley variety "Ardhaoui" cultivated on a large scale in arid Tunisia. This study was conducted for varying density of weed. The results show that D. harra hasn't got a significant competitive effect on the growth parameters of barley as the dry total biomass and the maximum height. Similarly, the presence of D. harra did not significantly affect the parameters of barley yield as the number of ears/feet and the number of seeds/spike. Field barley invasions by this weed cannot be attributed to its competitive power. So rather allelopathic behavior of the species or its massive seed set that appears to play a key role in invasiveness.

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