nutrien k, ca , mg dan mikronutrien
DESCRIPTION
NUTRIEN K, Ca , Mg dan Mikronutrien. Sigid Hariyadi. Primary Nutrient: K. ESSENTIAL NUTRIENT. Tucker, MR. 1999. Essential Plant Nutrients : their presence in North Carolina soils and role in plant nutrition. Primary Nutrient: K. Function:. - PowerPoint PPT PresentationTRANSCRIPT
NUTRIEN K, Ca, Mg dan Mikronutrien
Sigid Hariyadi
ESSENTIAL NUTRIENT
Tucker, MR. 1999. Essential Plant Nutrients: their presence in North Carolina soils and role in plant nutrition
Primary Nutrient: K
Primary Nutrient: K
Function:
Tucker, MR. 1999. Essential Plant Nutrients: their presence in North Carolina soils and role in plant nutrition
K - potassiumThe higher concentrations are found in the clayey soils of the piedmont and mountain regions. High potassium is also found in areas where animal and poultry wastes have been applied.
Tucker, MR. 1999. Essential Plant Nutrients: their presence in North Carolina soils and role in plant nutrition
Ca - calcium
Ca - calcium
Mg - magnesium
Mg - magnesium
S - sulfur
S - sulfur
Sulfur Cycle
Sulfur Cycle
Mn - manganese
Zn - zinc
Cu - copper
B - boron
Mo - molybdenum
Fe - iron
Diperlukan oleh organisme dlm jumlah yang cukup besar esensial bagi proses enzimatik dan selular metabolisme oksidatif dalam semua organisme
dan dalam proses fotosintesis pada tumbuhan melibatkan cytochrome yang mengandung Fe
Fe dibutuhkan dalam haemoglobin darah Fe berperan penting dlm enzim nitrogenase
pada tumbuhan tingkat rendah dan pada bakteri
Reaksi oksidasi-reduksi (redoks) dari Fe cukup berperan penting bagi berbagai tumbuhan dan hewan
Iron (Fe) Cycle
Ferric ironFerrous iron
Fe3+ Fe2+
Interaksi Fe-S-PPada periode ‘mixing’ air yg mengandung O2 mengendapkan feri (Fe3+) fosfat
Periode
‘anoxic’
(stratifikasi)
sedimen (danau
eutrofik) melepaskan
ion fero (Fe2+), ion fosfat (PO4
3-) dan H2S
ion sulfida (S2-) dari dissosiasi H2S dapat mengendapkan fero sulfida (FeS) – prosesini mengeluarkan Fe dan S dari sistem hampir secara permanen
SiO3 - silica
Marine diatoms
Silica Cycle
http://www2.plymouth.ac.uk/science/wembury/nutrient/biogeochemistry.htm#silicon
http://www.gly.uga.edu/railsback/Fundamentals/SFMGNutrientCycles06-III.jpg
Referensi:
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