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Titre :
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[Ecology of Hedysarum in Tunisia: Distribution of species in relation with environmental factors.] (2001)
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Auteurs :
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Aziza Zoghlami, Auteur ;
Hamadi Hassen, Auteur ;
Larry David Robertson, Auteur
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Type de document :
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Article
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Dans :
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Ecologia Mediterranea (27(1) 2001)
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Article en page(s) :
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99-108
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Résumé :
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In order to preserve and valorise forage and pasture legumes in Tunisia, particularly the genus Hedysarum which species are preferably eaten by animals and some of them are threatened because of many reasons, 3 collections missions were conducted in northern and central Tunisia. During these missions, 84 populations covering 5 species of Hedysarum were recorded over 77 sites distributed on 5 bioclimatic zones. H coronarium was the most widespread followed by H spinosissimum and by H carnosum. H pallidum and H were rare. The variance analysis applied to climatic and soil factors showed that natural distribution of Hedysarum species is mainly affected by rainfall and altitude and secondly by temperature. Chemical nutrients of soil and texture affected few or not the distribution of these species.
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