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Question
Explain how Nitrification is different from Nitrogen fixation. Mention the role of Thiobacllus in nitrogen cycle? What do you understand by biological Nitrogen fixation?
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Solution
- Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia or related nitrogenous compounds.
- Thiobacillus helps in the conversion of nitrates in the soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity.
- Biological nitrogen fixation is the process whereby atmospheric nitrogen (N=N) is reduced to ammonia in the presence of nitrogenase. Nitrogenase is a biological catalyst found naturally only in certain microorganisms such as the symbiotic Rhizobium and Frankia, or the free-living Azospirillum and Azotobacter.
- Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia or related nitrogenous compounds.
- Thiobacillus helps in the conversion of nitrates in the soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity.
- Biological nitrogen fixation is the process whereby atmospheric nitrogen (N=N) is reduced to ammonia in the presence of nitrogenase. Nitrogenase is a biological catalyst found naturally only in certain microorganisms such as the symbiotic Rhizobium and Frankia, or the free-living Azospirillum and Azotobacter.
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