Phosphorus Solubilizing Bacteria and Fungi
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Phosphorus Solubilizing bacteria and fungi play an important role in converting insoluble phosphatic compound such as rock phosphate, bone meal and basic slag particularly the chemically fixed soil phosphorus into available form.
  • Encourages early root development
  • Fosfofix produce organic acids like malic, succinic, fumaric, citric, tartaric and alpha ketoglutaric acid which hastens the maturity and thereby increases the ratio of straw as well as the total yield.
  • Increases compatibility of the other beneficial microbes with the plants
  • Stimulates formation of fats and convertible starches
  • Helps in rapid cell development in the plants and consequently increases the resistance towards disease
Mechanism of Action
  • Phosphorus solubilizing activity is determined by the ability of microbes to release metabolites such as organic acids, which through their hydroxyl and carboxyl groups chelate the cation bound to phosphate, the latter being converted to soluble forms.
  • Phosphate solubilization takes place through various microbial processes / mechanisms including organic acid production and proton extrusion.
  • Phosphorus solubilization is carried out by a large number of saprophytic bacteria and fungi acting on sparingly soluble soil phosphates, mainly by chelation-mediated mechanisms.
  • Inorganic P is solubilized by the action of organic and inorganic acids secreted by PSB in which hydroxyl and carboxyl groups of acids chelate cations (Al, Fe, Ca) and decrease the pH in basic soils.
  • The PSB dissolve the soil P through production of low molecular eight organic acids mainly gluconic and keto gluconic acids, in addition to lowering the pH of rhizosphere.
  • The pH of rhizosphere is lowered through biotical production of proton / bicarbonate release (anion / cation balance) and gaseous (O2/CO2) exchanges.
  • Phosphorus solubilization ability of PSB has direct correlation with pH of the medium.
  • Release of root exudates such as organic ligands can also alter the concentration of P in the soil solution.
  • Organic acids produced by PSB solubilize insoluble phosphates by lowering the pH, chelation of cations and competing with phosphate for adsorption sites in the soil.
  • Inorganic acids e.g. hydrochloric acid can also solubilize phosphate but they are less effective compared to organic acids at the same pH.
  • In certain cases phosphate solubilization is induced by phosphate starvation.

Schematic diagram of soil phosphorus mobilization and immobilization by bacteria

Active ingredient:
ENFOSFO is available in
  • Bacillus (Bacillus polymyxa or Bacillus megaterium) and
  • Pseudomonas (Pseudomonas striata) Etc.

Formulation - Talc /Dextrose/Liquid
CFU Count  - NLT 1x10^7/1x10^9 /1x10^9


Apply @7.5 -12.5 Kg per hectare in soil with compost

Shelf Life
  • Talc Base formulation : Six months
  • Dextrose / Liquid : One year

500gm in bilaminate pouches. 30 pack further packed in 7 ply carton.
Other packing is available on request .

Method of application

1. Seed treatment:

Apply 250 g ENFOSFO for 10 kg seeds. Moisten the seeds, sprinkle the slurry of ENFOSFO on seeds, mix thoroughly, dry under shed, & then sow.

2. Soil treatment:

Mix 10 kg ENFOSFO to 50 kg vermi compost & broadcast in an acre in root zone.

3. Seedling treatment:

Mix 1 kg ENFOSFO in 10 L water . Deep the seedlings in this slurry for half an hour & then transplant. Or 250 g per acre.
Recommended crops
All crops including Rice, Sugarcane, Orchards, Vegetables, Medicinal and Aromatic plants, Green House Crops.
Why ENFOSFO and not regular PSBs?
  1. ENFOSFO application found to increase the efficiency of super phosphate utilization applied on the field.
  2. The crops show significant yield increase to the extent of 5-10% after application of ENFORSO.
  3. Addition of rock phosphate couple with inoculation with ENFOSFO has given good response in many crops.
What is P, M and S in ENFOSFO?
Phosphorus Solubilizing Bacteria
We have three different strains of ENfosfo (phosphorus Solubilizing bacteria) as below

1. Basically this microorganism helps to convert non-available form of phosphorus to available form to the roots of the plants.
Products Active Ingredient Form Specs
Specific Use
Bacillus polymyxa
Talc cfu : 1x10^7
  • This strain is spore forming.
  • It survives in low moisture conditions in the soil and performs the function.
  • It is mostly recommended for the fields with low water availability and less moisture content.
  • These strains could be soil specific and performance needs to test before use.
Dextrose cfu : 1x10^9
Liquid cfu : 1x10^9
Bacillus polymyxa
    Converts non-available form of phosphorus to available form available to the roots of the plants. Helps reducing phosphorus fixation in soil.
Bacillus megaterium
    Converts non-available form of phosphorus to available form available to the roots of the plants. Helps reducing phosphorus fixation in soil.
Pseudomonas striata
    Converts non-available form of phosphorus to available form available to the roots of the plants. Helps reducing phosphorus fixation in soil.
Frateuria aurantia
    Mobilize potash and make it available to roots. Plays vital role in root and fruit development.
Thiobacillus ferrooxidans
    Enhances sulphur availability to plants. Recommended specifically oil seed crops and soil with sulphur deficiency.
Thiobacillus thiooxidans
    Zinc mobilizing bacteria helping to avoid zinc deficiency in the plant.
Acidithiobacillus ferrooxidans
    Mobilizes Ferrous in Soil.
Penicillium spp
    Converting non-available form of Manganese to available form. Infact its fungus but industry wide known as Mn mobilizing bacteria.
Vesicular Arbuscular Mycorrhiza
    Solubilizes Phosphorus and micro nutrients. Non-host specific association.
Special microbial Mix
    Enhances rate of composting and increases nutrient status of the compost. Helps to make Organic N, P, K and trace elements in exchangeable form and releases some Bio-Stimulants.
    2. Application dosages are same as given for all type of strains.
    3. Here the letters p, m & s are representing polymyxa, megaterium, & striata respectively.
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