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P element and Phosphorus nuitriton |
| Author : Doctor Liu Date : 8/5/2011 6:42:37 AM |
Phosphorus is utilized in the fully oxidized and hydrated form as orthophosphate. Plants typically absorb either H2PO4 or HPO42 , depending on the pH of the growing medium. However, under certain conditions plants might absorb soluble organic phosphates, including nucleic acids. A portion of absorbed inorganic phosphorus is quickly combined into organic molecules upon entry into the roots or after it is transported into the shoot.
Phosphate is a trivalent resonating tetraoxyanion that serves as a linkage or binding site and is generally resistant to polarization and nucleophilic attack except in metal-enzyme complexes . Orthophosphate can be condensed to form oxygen-linked polyphosphates. These unique properties of phosphate produce water-stable anhydrides and esters that are important in energy storage and transfer in plant biochemical processes.
Most notable are adenosine diphosphate and triphosphate (ADP and ATP). Energy is released when a terminal phosphate is split from ADP or ATP. The transfer of phosphate molecules to ATP from energy-transforming processes and from ATP to energy-requiring processes in the plants is known as phosphorylation. A portion of the energy derived from photosynthesis is conserved by phosphorylation of ADP to yield ATP in a process called photophosphorylation. Energy released during respiration is similarly harnessed in a process called oxidative phosphorylation.
Beyond their role in energy-transferring processes, phosphate bonds serve as important linkage groups. Phosphate is a structural component of phospholipids, nucleic acids, nucleotides, coenzymes, and phosphoproteins. Phospholipids are important in membrane structure. Nucleic acids of genes and chromosomes carry genetic material from cell to cell. As a monoester, phosphorus provides an essential ligand in enzymatic catalysis. Phytic acid, the hexaphosphate ester of myo-inositol phosphate, is the most common phosphorus reserve in seeds. Inorganic and organic phosphates in plants also serve as buffers in the maintenance of cellular pH
Phosphorus Deficiency symptoms
- A phosphorus deficiency may cause loss of weight, retarded growth, reduced sexual powers, and general weakness.
- It may result in poor mineralization of the bones, and a deficient nerve and brain function.
- Conditions associated with calcium deficiency may also occur due to phosphorus deficiency.
- Deficiencies of phosphorus are however rare, as it is one of the elements available in large quantities in most diets.
What P2O5 fertilizer does terrabetter Have ?
P002-1 Triple super phosphate 46%
P003-1 Phosphoric acid 75%
P003-2 Phosphoric acid 85%
P004-1 Phosphorous acid 98%
NP001 Mono ammonium phosphate 11-44-0 powder
NP001-01 Mono ammonium phosphate 11-44-0 granular
NP001-02 Mono ammonium phosphate 11-49-0
NP001-03 Mono ammonium phosphate 11-47-0
NP001-04 Mono ammonium phosphate 10-50-0
NP001-05 Mono ammonium phosphate tech grade(wet)
NP001-06 Mono ammonium phosphate tech grade (hot)
NP001-07 Mono ammonium phosphate food grade
NP002-01 Diammonium phosphate (DAP18-46-0)yellow
NP002-02 Diammonium phosphate (DAP18-46-0)brown
PK001-1 Mono potassium phosphate(MKP0-52-34)
PK002-1 Mono potassium phosphite(MKP0-58-38)
PK003-1 Dipotassium phosphate
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NPK Fertilizer
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