水耕營養液

Element	Ionic forms absorbed by plants	common range (ppm = mg/l)
Nitrogen	Nitrate (NO3-),    Ammonium (NH4+)	100-250
Phosphorus	H2PO4-, PO43-,      HPO42-	30-50
Potassium	Potassium (K+)	100-300
Calcium	Calcium (Ca2+)	80-140
Magnesium	Magnesium (Mg2+)	30-70
Sulfur	Sulfate (SO42-)	50-120
Iron	Fe2+, Fe3+	1.0-3.0
Copper	Copper (Cu2+)	0.08-0.2
Manganese	Manganese (Mn2+)	0.5-1.0
Zinc	Zinc (Zn2+)	0.3-0.6
Molybdenum	Molybdate (MoO42-)	0.04-0.08
Boron	BO32-, B4O72-	0.2-0.5
Chloride	Chloride (Cl-)	<75
Sodium		<50