Effects of Bradyrhizobium Japonicum on Nitrogen Concentration in Soybean Leaves and Seeds Cultivated on Acidic Soils
- 1 Institut National pour l’Études et la Recherche Agronomique (INERA), Kipopo Station, P.O Box 224, Lubumbashi, DR, Congo
- 2 Institut Supérieur des Techniques Appliquées de Lubumbashi (ISTA-LU), Lubumbashi, DR, Congo
- 3 Faculty of Agricultural Sciences, Université de Lubumbashi, Lubumbashi, DR, Congo
- 4 International Centre for Tropical Agriculture, Harvest-Plus, DR, Congo
The legume-rhizobium symbiosis plays an important role in Nitrogen (N) uptake by plants, more particularly in the humid tropical region where soils are deeply weathered and have poor electrochemical properties. However, the influence of Bradyrhizobium on N allocation in soybean organs is not clearly understood. Here, we assessed the effect of Bradyrhizobium japonicum on N concentration of soybean leaves and seeds cultivated on acidic soils. We conducted two experiments using a randomized full device with three replicates in two sites (i.e., Kasapa and Kanyameshi). The main plots included three strains of Bradyrhizobium and the uninoculated control while the subplots included soybean variety. We found that different strains of Bradyrhizobium did not induce significant effects on total N concentration in soybean leaves and seeds in the Kasapa site. In contrast, Bradyrhizobium strains affected significantly N concentration in soybean leaves in the Kanyameshi site. We demonstrated that soil N concentration, which varies between investigated sites, positively influences yield and nodulation. We conclude that the efficiency of the soybean-Bradyrhizobium symbiosis and its influence on the allocation of N through soybean organs strongly depend on the chemical characteristics of soil and particularly on the initial N concentrations in soils.
Copyright: © 2022 Ben Tshibuyi Kasu-Bandi, Fabien Kitengie Kitengie, Jonas Lwamuguma Bagaluza, Aristote Bwende Nkolomoni, Placide Kamanda Kamanda, Antoine Kanyenga Lubobo and Emery Kasongo Lenge. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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