Is biomass a reservoir for nitrogen?

Is biomass a reservoir for nitrogen?

All biomass resources originally produced by photosynthesis can be used as organic fertilizers. The amount of biomass (dry weight) in China was about 1.527 billion t·a −1. The total nitrogen reservoir was 4.12 times that of synthetic nitrogen fertilizer absorbed by agricultural plants.

Which is a reservoir for nitrogen?

atmosphere

Is lightning a reservoir for nitrogen?

Atmospheric Fixation The enormous energy of lightning breaks nitrogen molecules and enables their atoms to combine with oxygen in the air forming nitrogen oxides. These dissolve in rain, forming nitrates, that are carried to the earth.

Which is a reservoir for nitrogen Brainly?

The answer is C. atmosphere. An atmosphere contains about 78 percent of nitrogen gas. In animals plants, nitrogen can be found as a part of some macromolecules (proteins, nucleic acids), but in much smaller amount than in the atmosphere, which is the highest nitrogen source.

Why can’t we use nitrogen from out of the atmosphere?

Nitrogen in its gaseous form (N2) can’t be used by most living things. It has to be converted or ‘fixed’ to a more usable form through a process called fixation.

Why is nitrogen gas impossible for us to use for the nitrogen we need?

Nitrogen Fixing Although nitrogen is the most abundant gas in the atmosphere, it is not in a form that plants can use. To be useful, nitrogen must be “fixed,” or converted into a more useful form. Although some nitrogen is fixed by lightning or blue-green algae, much is modified by bacteria in the soil.

What type of organisms can fix nitrogen?

Two kinds of nitrogen-fixing microorganisms are recognized: free-living (nonsymbiotic) bacteria, including the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic (symbiotic) bacteria such as Rhizobium, associated with leguminous plants.

Is Rhizobium a free-living nitrogen-fixing bacteria?

What are some examples of nitrogen-fixing bacteria? Examples of symbiotic nitrogen-fixing bacteria include Rhizobium, which is associated with plants in the pea family, and various Azospirillum species, which are associated with cereal grasses.