Dependence of Azotobacter chroococcum culture growth rate on salt concentrations
2016
Astafyeva, Y., M. Auezov South-Kazakhstan State Univ., Shymkent (Kazakhstan) | Shalabayeva, K., M. Auezov South-Kazakhstan State Univ., Shymkent (Kazakhstan)
Biofertilizers are nutrient availability systems in which biological processes are involved. Being a cost effective, eco-friendly and renewable source of land nutrient and playing a vital role in maintaining a long term soil fertility and sustainability, at the same time reviving the soil health and living on alternate source biofertilizers have become an essential concept, which can be a good supplement for chemical fertilizers. Different factors affect the growth of Azotobacter chroococcum, including the temperature, oxygen and salt concentration, etc. During these cultivations, increase of productivity was studied as a bioprocess efficiency parameter compared with different media components ratio. Comparing with the Modified Ashby’s medium, which showed 5.1•108 cells per ml after 72 hours, in the medium with a higher amount of dipotassium hydrogen phosphate the growth rate of Azotobacter chroococcum biomass reached the maximum rate 11.0•108 cells per ml after the same period, thereby showing significant acceleration of the process, which may be used to improve large scale biofertilizer production technology by reduction of the biomass producing time.
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