Evolution of the floristic diversity of an artificial mixture meadow under semi-arid climate in Algeria.

In Algeria, the restoration and the creation of meadows on hydromorphic grounds of the wadi bed fields constitute a major issue of agricultural and environmental development of the semi-arid zones of altitudes which farming systems are mixed: agriculture-livestock. Within a site of this area, the diversity and frequency of the vegetable species were measured during 4 successive years on a long duration created mixture meadow and on a natural control one. Results were compared in the aim to understand the dynamics of these two types of vegetable formations subjected to traditional management practices. The results made possible to learn several lessons as for the productive provisions of the sown mixture meadow like on the fodder species having shown the best provisions of adaptation.