Plant and Soil

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Plant and Soil

• by
• Prof. Gernot K. Brueck, Ph.D.

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Plants consists of

• carbohydrats
• sugars and/or
• starch
• proteins
• aminoacids as basic element
• peptides to polypeptides proteins
• water

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The only responsible miracle for all organic
matter and any life in the world is

• Photosynthesis
• 6H2O (water)
• 6CO2 (carbondioxid
• energie (light)
• C6H12O6 (glycose)
• 6 O2 (oxygen)

beside itbacteria, yeasts, molds as aminoacid
producers
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The carbon cycle
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Which further elements are necessary ?

• Nitrogen (N)
• essential part of all aminoacids proteins
• Potassium (K)
• responsible for protein synthesis, control of
  ionic balance, regulation of plant stomata and
  water use, activation of plant enzymes and many
  other processes
• Phosphorus (P)
• essential part of the photosythesis

and smaller amounts of Sulfur, Magnesium and
Calcium which are left out in the further
consideration, because their cycles are near to
potassium
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The phosphorus cycle
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The potassium cycle
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The nitrogen cycle
Aerobic processes ( high oxygen content) are
converting any nitrogen compound into plant
available nutrient and anaerobic processes are
leading to nitrogen losses
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Summary

• plant growth relevant
• sufficient basic nutrients N-P-K in the soil
• high oxygen content in the soil for just aerobic
  processes
• avoiding anaerobic situations with N and root
  losses
• sufficient water
• if the organic matter remains at the place in
  the cycle, no further fertilizers are necessary !