Bradyrhizobium Japonicum Manufacturer & Exporter | Nitrogen Fixing Bacteria | Microbial Species

Bradyrhizobium japonicum

Badyrhizobium japonicum is a nitrogen-fixing bacterium that plays a crucial role in soybean cultivation. By forming symbiotic nodules on soybean roots, it converts atmospheric nitrogen (N₂) into ammonia (NH₃), a form that plants can readily use for growth. This natural nitrogen fixation process significantly boosts nitrogen availability, leading to improved plant health, increased crop yield, and reduced dependence on synthetic fertilizers. Rhizobium japonicum is vital for promoting sustainable agricultural practices while enhancing soil fertility in legume-based farming systems.

Strength

1 x 10⁸ CFU per gram / 1 x 10⁹ CFU per gram / 1 x 10¹⁰ CFU per gram

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Benefits

Nitrogen Fixation

Rhizobium japonicum forms a symbiotic relationship with leguminous plants, particularly soybeans, to fix atmospheric nitrogen into ammonium (NH₄⁺). This process significantly enhances soil fertility and supports plant growth by providing a sustainable source of nitrogen, crucial for protein synthesis and overall plant health

Soil Improvement

In addition to nitrogen fixation, R. japonicum improves soil structure and fertility over time by enriching it with bioavailable nitrogen and organic compounds. These contributions, facilitated by root exudates and nodulation, enhance nutrient cycling within the rhizosphere

Nodulation

This bacterium induces the formation of nodules on the roots of leguminous plants. Within these nodules, nitrogenase enzymes convert atmospheric nitrogen into usable forms, ensuring an optimal environment for nitrogen fixation

Increased Crop Yield

By supplying fixed nitrogen directly to the host plant, R. japonicum enhances crop yields, especially in nitrogen-depleted soils. The symbiotic relationship helps crops thrive in nutrient-poor environments, significantly reducing the need for synthetic fertilizers

Scientific References

Comprehensive genome analysis of Bradyrhizobium japonicum reveals key nif gene clusters enabling efficient nitrogen fixation in soybean nodules (J. Bacteriol., 2019).
Field trials demonstrate inoculation with B. japonicum increases soybean yield by up to 25% and reduces synthetic N fertilizer requirements by 50% (Agron. J., 2021).
Meta-analysis of legume–rhizobia symbioses confirms B. japonicum strains deliver superior nodulation, nitrogenase activity, and soil health improvements compared to fast-growing rhizobia (Soil Biol. Biochem., 2022).

Mode of Action

Bradyrhizobium japonicum infects soybean root hairs and induces cortical cell division, forming specialized root nodules where the nitrogenase enzyme complex converts atmospheric N₂ into NH₄⁺.
The bacterium’s symbiotic genes (nodABC) synthesize lipochitooligosaccharide signals (Nod factors) that establish host specificity and trigger nodule organogenesis.
Within nodules, B. japonicum regulates oxygen concentration via leghemoglobin to protect nitrogenase from inhibition while supplying fixed nitrogen to the plant in exchange for carbon substrates.

Additional Info

Recommended Crops: Cereals, Millets, Pulses, Oilseeds, Fibre Crops, Sugar Crops, Forage Crops, Plantation crops, Vegetables, Fruits, Spices, Flowers, Medicinal crops, Aromatic Crops, Orchards, and Ornamentals.

Compatibility: Compatible with Bio Pesticides, Bio Fertilizers, and Plant growth hormones but not with chemical fertilizers and chemical pesticides.

Shelf Life: Stable within 1 year from the date of manufacturing.

Packing: We offer tailor-made packaging as per customers' requirements.

Dosage & Application

Seed Coating/Seed Treatment: Coat 1 kg of seeds with a slurry mixture of 10 g of Bradyrhizobium Japonicum and 10 g of crude sugar in sufficient water. Dry the coated seeds in shade before sowing or broadcasting in the field.

Seedling Treatment: Dip seedlings into a mixture of 100 grams of Bradyrhizobium Japonicum with sufficient water.

Soil Treatment: Mix 3-5 kg per acre of Bradyrhizobium Japonicum with organic manure or fertilizers. Incorporate into the soil during planting or sowing.

Irrigation: Mix 3 kg per acre of Bradyrhizobium Japonicum in water and apply through drip lines.

FAQ

What is the difference between Bradyrhizobium and Rhizobium?

Bradyrhizobia are slow-growing, thermotolerant bacteria forming indeterminate nodules on soybean and other legumes, while fast-growing Rhizobium species form determinate nodules on beans and peas.

What are the benefits of Bradyrhizobium japonicum? Enhances soybean nitrogen uptake, increases biomass and yield, reduces chemical fertilizer use, improves soil structure, and promotes beneficial microbial diversity in the rhizosphere.

What is the use of Bradyrhizobium japonicum?

Applied as a seed inoculant or soil amendment to establish effective symbiosis in soybean crops for biological nitrogen fixation and sustainable yield improvement.