Answer:
The nitrogen cycle is divided into six phases, whose perfect gear is vital for the living beings of the planet. Let us then see what these phases consist of, which are:
1. fixation
2. nitrification
3. assimilation
4. ammonification
5. immobilization
6. denitrification.
Step-by-step explanation:
The nitrogen cycle refers to the natural pattern, which meets the nitrogen when incorporated into different elements, starting with the soil, then moving on to the plants, then entering living organisms through food and then returning to the atmosphere.
1. Fixation. At this stage, the nitrogen contained in the earth's atmosphere is absorbed by the plants, once the nitrogen that is in the form of gas is transformed into ammonia, due to the action of certain microorganisms that make life in the soil and water, who are responsible for breaking it down, so that plants use nutrients to stay alive.
2. Nitrification. some bacteria present in the soil participate in the oxidation of ammonia, from which ammonia is obtained, which is in turn oxidized by other bacteria, transforming it into nitrate. For this phase to succeed, there are external factors, such as soil composition, temperature, humidity, pH, nutrients and the amount of oxygen. Simply put, once the nitrogen is transformed into nitrate or ammonium, plants take it from the soil.
3. Assimilation. Precisely during this phase of the nitrogen cycle, plants are impregnated with nitrate or ammonia, taking advantage of their roots absorption capacity and there begins the process of assimilation and transformation of the element into nutrients, easily usable by living beings that consume.
4. Ammonification. The decomposition of organic matter is of vital importance at this point in the nitrogen cycle, with the understanding that decomposed wastes, microorganisms, which degrade them to simple compounds and metabolize them, release the excess nitrogen in form of ammonia or ammonium ion. In this sense, organic waste forms a foothold to indirectly absorb nitrogen in the form of processed ammonia.
5. Immobilization. This phase is a response to the intervention of the metabolic processes of microorganisms in the use of nitrogen, forming organic nitrogen, that is, a phase contrary to nitrification. For this reason, the vegetation does not absorb it, nor assimilate it to previous decomposition, so it is immobilized.
6. Denitrification. The intervention of microorganisms that are responsible for deoxidizing nitrates and ammonia, returning it to the atmosphere in the form of gas, is known as the "denitrification process" or "participation of denitrifying bacteria." During this process, metabolic, which is carried out mainly under anaerobic conditions, nitrate is reduced to nitrogen gas and is a phenomenon that is observed in a linear fashion, until the gas is incorporated back into the atmosphere.