Steps in Nitrogen Cycle

Steps in Nitrogen Cycle

Steps in Nitrogen Cycle
During the cycling of nitrogen,-two-major processes namely mineralisation
and immobilisation of nitrogen occur.

Mineralisation Here the bound organic unavailable form of nitrogen (proteins, nucleic acids, amides, amines, urea, etc.) get converted to easily available and assimilable form of nitrogen (ammonia, nitrite and nitrate) by the action of microbes present in the environment (terrestrial and aquatic). This process occurs as ammonification and nitrification processes.

Immobilisation The available form of nitrogen (ammonia or nitrate) are being utilised by plants (at large) and by the microbes themselves (for their cellular needs) and thus the inorganic form of nitrogen gets converted into bound organic form. In another case, the atmospheric nitrogen (gaseous form) both during nitrogen fixation and denitrification gets fixed inside the microbial cell as utilisable form (proteins) wherein it is called nitrogen fixation.

The three primary processes involved in the N cycle are nitrogen fixation, nitrification, and denitrification. In nitrogen fixation, N₂ serves as a nitrogen source for bacteria. In nitrification, ammonia or nitrite serves as the source of reductant and energy for chemolithotrophic growth. In denitrification, N oxides serve as terminal electron acceptors to support microbial respiration, usually in the absence of O₂,

Applications of Microbial Interactions Part 2
Causes of Corrosion
Oxygen Influencing Corrosion
Anaerobic Microbial Corrosion
Pitting Corrosion
Protection from Corrosion
Microbially Induced Concrete Corrosion
Bio-Mining
Microbiology and Chemistry of Ard
Bioleaching and Bio-Oxidation
Bio-Accumulation
Xenobiotics
Bio-Geochemical Cycles
Carbon Cycle
Sources of Carbon Cycle
Scources of Organic Carbon
Mineralisation of Carbon
Decomposition and Carbon Dioxide Evolution
Carbon Assimilation
Nitrogen Cycle
Steps in Nitrogen Cycle

Home | Site map | Submit Article | Directory | Search