What is the unpatented nitrogen cycle of microorganisms?

Nitrogen is another essential element for organisms, and the nitrogen cycle in nature includes many transformations. Nitrogen in the air is fixed into ammonia nitrogen by nitrogen-fixing microorganisms and living organisms of plants and microorganisms, and transformed into nitrate nitrogen by nitrifying microorganisms, and the latter is assimilated into organic nitride by plants or microorganisms.

Animals eat nitrogen-containing plants and become protein in animals.

The carcasses and excrements of animals, plants and microorganisms are decomposed by microorganisms and then released in the form of ammonia. This process is called ammoniation.

Nitrate produced by nitrifying bacteria is reduced to nitrogen by some microorganisms under anaerobic conditions and returns to the atmosphere to start a new nitrogen cycle.

Several functions of microorganisms in nitrogen cycle can be summarized as: nitrogen fixation, nitrification, assimilation, ammoniation and denitrification.

2. The significance of nitrogen cycle

Biological nitrogen fixation converts free nitrogen in the atmosphere into nitrogen that can be directly absorbed and utilized by organisms. Nitrogen is an essential element to form biological protein, and it is also one of the essential elements for biological growth, and it also participates in various life activities.

Nitrogen in the atmosphere is bound by nitrogen and nitrogen triple bond, which is very close and difficult to be directly absorbed by organisms.

The efficiency of artificial nitrogen fixation is not high, and the conditions of high temperature and high pressure are harsh, so it is difficult to collect the nitrogen fixed by lightning nitrogen fixation volcano eruption.

At the same time, the nitrogen stations fixed by biological nitrogen fixation account for 90% of the global nitrogen fixation, accounting for an absolute number, which promotes the circulation of substances in the ecological circle, so biological nitrogen fixation is of great significance in the whole biological world.