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Index >> Population Interactions >> Alteration of Rhizosphere Microflora

Alteration of Rhizosphere Microflora

Alteration of rhizosphere microflora This may be done by:
Soil amendments
This refers to the artificial addition of fertilisers with nitrogen, phosphorous and potassium. This depends on the rhizosphere: soil (R:S) ratio and also on the nutritional content of the chemicals in the soil.

Foliar application of nutrients
Translocation of photosynthates from leaves to roots is a well known phenomenon and this does not affect the microflora. So when foliar application of antibiotics, growth regulators, pesticides and inorganic nutrients is carried out, a small amount is being released as root exudates and this can either promote the growth of the present microflora or change the microflora to some extent.

Artificial inoculation
This is done on seed or soil with preparation containing live microorganisms especially bacteria (bacterisation). This is beneficial, in that this provides an easier way for the establishment of the microbes to the rhizosphere. This is because as the seed is coated with the live microorganisms, as soon as the root evolves, the colonising of the root takes place and establishment of the other microbes is also made possible. Microbial seed inoculants generally used are Azotobacter, Beijerinckia, Rhizobium or phosphorous solubilising microorganisms

 

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