The use of isotopic dilution techniques to evaluate the interactive effects of Rhizobium genotype, mycorrhizal fungi, phosphate-solubilizing rhizobacteria and rock phosphate on nitrogen and phosphorus acquisition by Medicago sativa

abonos abonos fosfatados absorption de substances nutritives azote engrais enterobacter fertilizers fixation de l'azote fosfato mineral fosforo glomus mosseae inoculation legumes leguminosas medicago sativa mineral nutrients mycorrhizae nitrogen nitrogen fixation nutrient uptake nutrientes minerales nutrition des plantes phosphate fertilizers phosphate naturel phosphore phosphorus plant nutrition racine rhizobium rhizobium meliloti rock phosphate roots