Abstract
Soybean nodulation was induced indigenously by three strains ofBradyrhizobium japonicum inoculated in each of the two previous seasons. The same strains were applied, as a peat-based inoculum in similar cell density as the indigenous ones, to a rhizobia-free soll from the same field. Inoculation was tested under soll application of 10 or 20 ppm Mn and/or 2 or 4 ppm Mo. Inoculation with the peat-based inoculum significantly increased nodule numbers and weight, dry weight, N content and mg N/g of the 50-day-old plants, number of pods and seeds per plant, seed yield, seed N content and percentage, and mg N/g of the empty pods. Increasing the application of Mn and Mo fed to further increases. There was a complex response of nodulation, vegetative growth and yield to the applications of Mn and Mo.
Résumé
La nodulation chez le soja a été induite de manière indigène par trois souches deBradyrhizobium japonicum, inoculées pendant chacune des deux saisons précédentes. Les mêmes souches ont été appliquées dans un inoculum à base de tourbe de densité similaire aux inocula indigènes, à un sol exempt de rhizobia dans le même champ. L'inoculation a été testée sous des applications au sol de 10 ou 20 ppm de Mn et/ou de 2 ou 4 ppm de Mo. L'inoculation avec l'inoculum à base de tourbe a augmenté de manière significative le nombre et le poids des nodules, leur contenu en azote et en mg d'N par g de plants âgés de 50 jours, le nombre de cosses et de grains par plant, le rendement en graines, leur contenu en azote ainsi que le pourcentage et le rapport mg d'N par g de cosses vides. L'augmentation de l'application de Mn et du Mo a conduit à un nouvel accroissment. La réponse de la nodulation, de la croissance végétative et du rendement aux applications de Mn et Mo s'est révèlée complexe.
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Yanni, Y.G. Response of symbiotic interrelationship between soybean and the indigenous or inoculated microsymbiont,Bradyrhizobium japonicum, to soil application of manganese and molybdenum. World J Microbiol Biotechnol 6, 289–294 (1990). https://doi.org/10.1007/BF01201299
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DOI: https://doi.org/10.1007/BF01201299