0
NITROGEN CYCLE
BY MOLLY RATHORE
IX-NILGIRIS
NITROGEN
Nitrogen gas makes up to 78% of the atmosphere and
it is also a part of many molecules essential to life, like
pr...
NITROGEN FIXATION

 All organisms cannot use the atmospheric nitrogen
directly.
 However some bacteria and blue green al...
 Nitrogen fixing bacteria like rhizobium, are found
in the roots of some of the dicot plants such as
legumes.
 These are...
ATMOSPHERIC
NITROGEN FIXATION
Nitrogen fixation also takes place during lightening.At the time of lightening high temperat...
Nitrogen from the atmosphere
Out
gassin
g

Atmospheric
fixation

Atmospheric Nitrogen
4 000 000 000 Gt

Plant
protein
Biol...
INDUSTRIAL NITROGEN
FIXATION
 Human beings also fix nitrogen for their use.
 This is done by manufacturing ammonia and u...
INDUSTRIAL NITROGEN
FIXATION
Atmospheric Nitrogen

Atmospheric
fixation

Out
gassin
g

Industrial
fixation
Plant
protein
B...
NITROGEN CYCLE
 Plants take up nitrites and nitrates and converts
them into amino acids. Which are used to make
proteins....
NITROGEN CYCLE
 Some other bacteria present in the soil converts the
various compounds of nitrogen back into nitrates
and...
NITROGEN CYCLE
Thus, there is a nitrogen-cycle in nature
in which nitrogen passes from its
elemental form in the atmospher...
THANK YOU
Upcoming SlideShare
Loading in...5
×

Nitrogen cycle

2,565

Published on

a detailed presentation on nitrogen cycle

Published in: Education, Technology, Business
0 Comments
3 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
2,565
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
220
Comments
0
Likes
3
Embeds 0
No embeds

No notes for slide

Transcript of "Nitrogen cycle "

  1. 1. NITROGEN CYCLE BY MOLLY RATHORE IX-NILGIRIS
  2. 2. NITROGEN Nitrogen gas makes up to 78% of the atmosphere and it is also a part of many molecules essential to life, like proteins, nucleic acids ( DNA and RNA ) and some vitamins. Nitrogen is also found in other biological compounds such as alkaloids. Nitrogen is an essential nutrient for all life forms.
  3. 3. NITROGEN FIXATION  All organisms cannot use the atmospheric nitrogen directly.  However some bacteria and blue green algae are able to do so.  They convert nitrogen molecules into simpler forms such as nitrates and nitrites.
  4. 4.  Nitrogen fixing bacteria like rhizobium, are found in the roots of some of the dicot plants such as legumes.  These are present in special structures called root nodules.
  5. 5. ATMOSPHERIC NITROGEN FIXATION Nitrogen fixation also takes place during lightening.At the time of lightening high temperature and pressure created in the air converts nitrogen into oxides of nitrogen. These oxides dissolve in rain water to form nitric and nitrous acids. This process is know as atmospheric nitrogen fixation. These acids are then utilized by various life forms
  6. 6. Nitrogen from the atmosphere Out gassin g Atmospheric fixation Atmospheric Nitrogen 4 000 000 000 Gt Plant protein Biological fixation Soil organic nitrogen Root uptake Nitrate NO3-
  7. 7. INDUSTRIAL NITROGEN FIXATION  Human beings also fix nitrogen for their use.  This is done by manufacturing ammonia and urea in the industries.  This is called as the industrial nitrogen fixation.
  8. 8. INDUSTRIAL NITROGEN FIXATION Atmospheric Nitrogen Atmospheric fixation Out gassin g Industrial fixation Plant protein Biological fixation Soil organic nitrogen Ammonium NH4+ Nitrate NO3-
  9. 9. NITROGEN CYCLE  Plants take up nitrites and nitrates and converts them into amino acids. Which are used to make proteins.  These proteins are consumed by animals.  Thus we can say that nitrogen is present in both plants and animals.  Nitrogen is returned back to the nature when an animal excretes or when an animal dies.
  10. 10. NITROGEN CYCLE  Some other bacteria present in the soil converts the various compounds of nitrogen back into nitrates and nitrites.  A different type of bacteria converts the nitrates and nitrites into elemental nitrogen. ( nitrogen in the atmosphere ). The process of conversion of nitrates and nitrites into ammonia is called ammonification. Conversion of ammonia into nitrites and then nitrates is called nitrification.
  11. 11. NITROGEN CYCLE Thus, there is a nitrogen-cycle in nature in which nitrogen passes from its elemental form in the atmosphere into simple molecules in the soil and water, which get converted to more complex molecules in living beings and back again to the simple nitrogen molecule in the atmosphere.
  12. 12. THANK YOU
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×