Transcript Plant and Soil

Plant and Soil
by
Prof. Gernot K. Brueck, Ph.D.
2nd of May, 2007
G4 General Trading LLC
Plants consists of:
• carbohydrats
– sugars and/or
– starch
• proteins
– aminoacids as basic element
– peptides to polypeptides = proteins
• water
2nd of May, 2007
G4 General Trading LLC
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 it:bacteria, yeasts, molds as
aminoacid producers
2nd of May, 2007
G4 General Trading LLC
The carbon cycle
2nd of May, 2007
G4 General Trading LLC
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
2nd of May, 2007
G4 General Trading LLC
The phosphorus cycle
2nd of May, 2007
G4 General Trading LLC
The potassium cycle
2nd of May, 2007
G4 General Trading LLC
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
2nd of May, 2007
G4 General Trading LLC
Summary
•
plant growth relevant
a. sufficient basic nutrients N-P-K in the soil
b. high oxygen content in the soil for just aerobic
processes
c. avoiding anaerobic situations with N and root losses
d. sufficient water
•
if the organic matter remains at the place = in the
cycle, no further fertilizers are necessary !
2nd of May, 2007
G4 General Trading LLC