Valeur pastorale des herbages en région soudanienne, le cas des parcours sahéliens du Nord-Sénégal

Abstract

Pasture Value of Herbages in Soudanian Region : The Case of Sahelian in North-Senegal. The pasture value of sahelian rangelands, which is characterized by a more or less continuous herbaceous layer and a discontinuous cover of shrubs and trees, was investigated from the pastoral composition and the global quality index. The observations consisted on floristic sampling in the shade and in the open part of the plots. Frequential analysis technics applied to floristic data allowed to highlight a great floristic diversity in the forage spectrum of the shaded rangelands compared to the open. Good fodder plants were scare in the tree shelter where their input in the herbaceous layer are very limited. The global quality index of the rangelands is largely more important in the unshaded zones, because of the Poaceae predominance.

Keywords

• Rangelands
• Forage spectrum
• Quality index
• Tree shelter
• Sahel
• Ferlo