Inoculation and Competitiveness of a Bradyrhizobium sp. Strain in Soils Containing Indigenous Rhizobia

BONFIGLIO, C., BOGINO, P. AND GIORDANO, W.

Biological Nitrogen Fixation: Towards Poverty Alleviation through Sustainable Agriculture

Springer, Dordrecht

Año: 2008; p. 149 - 151

The successful nodulation of legumes by a particular rhizobial strain is determined by the competitive ability of that strain against a mixture of other native and inoculant rhizobia. Selected Bradyrhizobium sp strains inoculated on peanut seeds often fail to occupy a significant proportion of nodules when a competitor rhizobial population is already established in soil. Such failure may result either from a genetic or physiological advantage of the adapted soil population over the introduced inoculant, or from a positional advantage, i.e., the soil population occupies the soil profile where the roots will penetrate, whereas the inoculant remains concentrated around the seeds.