Biodisponibilité du phosphore et interactions plante- rhizosphère chez quelques génotypes d'arachide (Arachis hypogaea L.)

Abstract

Phosphorusdeficiencyis one of the factors limiting the production of seedlegumes, includinggroundnut (Arachishypogeae L.). The aim of thisworkis to study the availability of phosphorus to the five genotypes of peanuts as a function of the effect of phosphate treatment TSP and CaP in twosoil types (rhizospheric and non- rhizospheric) withpresence and / or absence of rhizobialstrain. The experimentalresultsobtained show that the soil of the peanutgenotypescharacterized by an alkaline pH which causes the decrease of solubility of P. Moreover, the phosphate treatment TSP has a significanteffect on the phosphorus factor but it has no influence Significant for calcium and nitrate. This is directly related to the nature of the limestone soil of our regions and is a major limiting factor that prevents the availability of phosphorus in the soil-plant system