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A biofertilizer is a substance which contains living micro-organisms which, when applied to seeds, plant surfaces, or soil, colonize the rhizosphere or the interior of the plant and promotes growth by increasing the supply or availability of primary nutrients to the host plant. [1]
Currently, the main purpose in managing soil phosphorus is to optimize crop production and minimize P loss from soils. PSB have attracted the attention of agriculturists as soil inoculums to improve the plant growth and yield. When PSB is used with rock phosphate, it can save about 50% of the crop requirement of phosphatic fertilizer.
At least one study has so far shown a significant increase in crop production linked to the production of "auxins, cytokinins, and GA–like substances" by A. chroococcum. [6] In addition to these biomolecules, this bacterium has been found to be able to produce "siderophores, ammonia, and ACC deaminase", as well as indoleacetic acid, which all ...
In addition to being a model organism for studying diazotrophs, it is used by humans for the production of biofertilizers, food additives, and some biopolymers. The first representative of the genus, Azotobacter chroococcum, was discovered and described in 1901 by Dutch microbiologist and botanist Martinus Beijerinck.
Diazotroph biofertilizers used today include Rhizobium, Azotobacter, Azospirilium and Blue green algae (a genus of cyanobacteria). These fertilizer are widely used and commenced into industrial production. So far in the market, nitrogen fixation biofertilizer can be divided into liquid fertilizer and solid fertilizer.
Biofertilizers are seen as promising, sustainable alternatives to harmful chemical fertilizers due to their ability to increase yield and soil fertility through enhancing crop immunity and development. When applied to the soil, plant, or seed these biofertilizers colonize the rhizosphere or interior of the plant root. Once the microbial ...
The large production of sulfuric acid is primarily motivated by this application. [38] In the nitrophosphate process or Odda process (invented in 1927), phosphate rock with up to a 20% phosphorus (P) content is dissolved with nitric acid (HNO 3 ) to produce a mixture of phosphoric acid (H 3 PO 4 ) and calcium nitrate (Ca(NO 3 ) 2 ).
Thus, cost-benefit analyses are needed to determine when nutrient addition may be required and beneficial to foster algal growth. The lipid-extracted biomass can be used for a multitude of functions: biogas production, a biofertilizer carrier, biofertilizer itself, biochar production, and an ingredient in animal feed. [14]