Comments on the use of the classical probability level of P=0.05 in assessing the efficacy of microbial inoculants for agricultural applications

Survival and change in physiological state of Bradyrhizobium japonicum in soybean (Glycine max L. Merril) liquid inoculants after long-term storage

International audience

Caracteristicas fisiologicas, eficiencia y competitividad de cepas de Bradyrhizobium japonicum, aisladas de suelos e inoculantes argentinos

Changes in the physiological and agricultural characteristics of peat-based Bradyrhizobium japonicum inoculants after long-term storage

International audience; Commercial soybean inoculants processed with sterilised peat and stored at 20 °C for 1–8 years were used as experimental materials to assess the changes in the physiological activity of Bradyrhizobium japonicum after storage. Viable counts decreased and physiological characteristics of the bacterium changed during storage, with an increase in the time taken for colony appearance on a medium without yeast extract, an increase in the lag time for nodule appearance on soybean grown in glass tubes and a decrease in survival on seeds. All the inoculants produced a significant increase in grain yield in a field experiment. The percentage of efficient cells in the field (re…