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cycling of nitrogen in biosphere

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Nitrogen cycle ppt
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cycling of nitrogen in biosphere

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how nitrogen play an very very important in our environment and how it occurs that is describe in this slid . i think it is helpful for your study. thank you.

how nitrogen play an very very important in our environment and how it occurs that is describe in this slid . i think it is helpful for your study. thank you.

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cycling of nitrogen in biosphere

  1. 1. Cycling Of Nitrogen In The Biosphere University Of Rajshahi Submitted by 1.Md Yesir Arafat 2.Saon Priya Shova 3. Aminul Islam
  2. 2. 78% 21% < 1% The Study Of Earth's Atmosphere
  3. 3. Nitrogen Cycle a continuous series of natural processes by which nitrogen passes from air to soil to organisms and back to air or soil involving nitrogen fixation, nitrification, amminofication (decay) , and denitrification.
  4. 4. There are 5 Step’s of nitrogen cycle: 1.Nitrogen Fixation 2.Nitrogen Assimilation 3.Ammonification 4.Nitrification 5.Denitrification
  5. 5. 1.Nitrogen Fixation 2.Nitrogen Assimilation 3.Ammonification 4.Nitrification 5.Denitrification N2 N2 N2 NH3 +/NH4 There are 5 Step’s of nitrogen cycle:
  6. 6. 1.Nitrogen Fixation 2.Nitrogen Assimilation 3.Ammonification 4.Nitrification 5.Denitrification NH3 +/NH4 Organic N There are 5 Step’s of nitrogen cycle:
  7. 7. 1.Nitrogen Fixation 2.Nitrogen Assimilation 3.Ammonification 4.Nitrification 5.Denitrification NH3 +/NH4 Organic N There are 5 Step’s of nitrogen cycle:
  8. 8. 1.Nitrogen Fixation 2.Nitrogen Assimilation 3.Ammonification 4.Nitrification 5.Denitrification NH3 +/NH4 NO3 - There are 5 Step’s of nitrogen cycle:
  9. 9. 1.Nitrogen Fixation 2.Nitrogen Assimilation 3.Ammonification 4.Nitrification 5.Denitrification NO3 - N2 N2 N2 There are 5 Step’s of nitrogen cycle:
  10. 10. 1.Nitrogen Fixation 2.Nitrogen Assimilation 3.Ammonification 4.Nitrification 5.Denitrification There are 5 Step’s of nitrogen cycle:
  11. 11. Atmosphere Biosphere N2 N2 N2 NH3/ NH4 + Nitrogen Fixation NO2 - NO3 - Nitrofication PLANT ANIMAL Assimilation DICOMPOSER Amminification Di Nitrofication THE NITROGEN CYCLE
  12. 12. 1. Nitrogen Fixation Atmosphereic nitrogen gas is converted into inorganic nitrogen compounds. Nitrogen gas can be fixed in three ways. I. Atmospheric fixation. II. Industrial fixation. III. Biological fixation.
  13. 13. I. Atmospheric Fixation This occurs spontaneously by Lightning; only a small amount (5–8%) is fixed this way. Lightning allows nitrogen and oxygen to combine to produce various oxides of nitrogen. These are carried by the rain into the soil where they can be used by plants.
  14. 14. II. Industrial Fixation. Haber-Bosch Process method of directly synthesizing ammonia from hydrogen and nitrogen, developed by the German physical chemist Fritz Haber. This is a very energy-inefficient process.
  15. 15. III. Biological fixation. Biological nitrogen fixation is an important process in the soil, carried out by several groups of bacteria and actinomycetes able to absorb nitrogen from the atmosphere and combine it into compounds that serve as nutrients from plants.Nitrogen-fixing bacteria are Rhizobium, Clostridium, Azotobacter etc, fix 60% of nitrogen gas in the atmosphere.
  16. 16. 2. Nitrofication a process carried out by nitrifying bacteria such as Nitrosomonus, Nitrobactor , transforms soil ammonia into nitrates, which plants can incorporate into their own tissues.
  17. 17. Nitrogen Assimilation are assimilation of nitrates and ammonia resulting from nitrogen fixation into the specific tissue compounds of algae and higher plants. Animals then ingest these algae and plants, converting them into their own body compounds. 3.Nitrogen Assimilation 3
  18. 18. 4.Ammonification (decay) The decomposers, certain soil bacteria and fungi, break down proteins in dead organisms and animal wastes, releasing ammonium ions which can be converted to other nitrogen compounds
  19. 19. 5.Denitrification The process where nitrates are metabolized by denitrifying bacteria Pseudomonas to free nitrogen and returned to the atmosphere.
  20. 20. Importance of Nitrogen Cycle • Maintain Optimum growth of Plants , • majority of nitrogen is obtain from the atmosphere is used in the production of NH3 (Haber process) which is a raw source for the manufacture of Nitric acid (Ostwald process). • Synthesis natural and artificial Fertilizer e.g, Ammonium Sulphate.
  21. 21. Thank you MD YESIR ARAFAT BMB-36 CREATOR

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