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Biology - Phosphorus cycle and fertilizer run-off

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yishan chen

on 22 September 2014

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Transcript of Biology - Phosphorus cycle and fertilizer run-off

Fertilizer Run off
Fertilizer runoff is when a ground gets too much water and can no longer absorb it so it washes off. This is bad because the water has large amounts of nutrients that can contaminate other water sources with undesirable chemicals
Phosphate Ion
Phosphate : an inorganic chemical, is a salt of phosphoric acid In organic chemistry, a phosphate, or organophosphate, is an ester (any of a class of often fragrant organic compounds) of phosphoric acid.
Fertilizers:
used in agriculture

nutrients:
survive, grow found in environment,
Phosphorous used in DNA and ATP

Phosphorous Cycle:
not cycled through atmosphere, soil, living things, weathering releases trapped phosphorous

explanation of cycle:


Long term & Short term
The Importance of Phosphorous to Living Organisms
- Phosphorous is a key element in cell membranes, molecules, and in the making of DNA. It binds deoxyribose sugars together, forming the backbone of the DNA molecule.
Phosphorus Cycle and Fertilizer Run-Off
Agriculture and Nutrient Cycles

- Phosphorous is a component in ATP which is a fundamental source in living organisms. It's found in complex organic compounds in the blood, muscles, nerves, and in calcium phosphate (an important material in bones and teeth)
A phosphate salt forms when a positively charged ion attaches to the negatively charged oxygen atoms of the ion, forming an ionic compound.
Many phosphates are not soluble in water at standard pressure and temperature
The sodium, potassium, rubidium, cesium and ammonium phosphates are all water soluble.

Eutrophication
Originating from the word "Eutrophic"(meaning well nourished) Eutrophication refers to adding nutrients to large bodies of water ,either natural or caused by man... when the effects are undesirable ,to even be considered pollution
Fertilizers
materials used to restore nutrients and increase production (plants)



THREE MAIN NUTRIENTS: MACRO NUTRIENTS:
Nitrogen: green Sulfer: roots

Phosphorus: cell division Calcium: roots

Potassium: stems and root Mg: chlorophyll



Three numbers on bag of fertilizer are
N
itrogen
P
hosphorus
K
:
potassium
Phosphorous Cycle
Short Term: Involvement of living organisms (Biotic)
More rapidly, consuming a smaller amount of time

Long Term: involvement of the rocks from Earth's crust (Abiotic)
-Can take up to millions of years to complete



* with the exception of dissolved inorganic phosphate(Abiotic) - part of both cycles
Fact: Phosphorus on lands has slow decrease, making it less available to plants due to it lost in the runoff.
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