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Table 4 Hydroponic nutrient solutions

From: Can differences in phosphorus uptake kinetics explain the distribution of cattail and sawgrass in the Florida Everglades?

 

Basic nutrient solution

P addition solution

Major adjustment

Condition

   

   pH

6.5

6.5

NaOH, H2SO4

   Conductivity

1 mS cm-1

 

Intermediate renewal

   Temperature

27°C

  

   Oxygen

<0.5 or 8 mg l-1

  

Element

   

   Phosphorus

5 or 500 μg l-1

50 mg l-1

KH2PO4

   Nitrogen

2.4 mg l-1

 

(NH4)2SO4

   Potassium

3.4 mg l-1

802 mg l-1

K2SO4, KH2SO4

   Calcium

130 mg l-1

291 mg l-1

CaSO4, CaCl2

   Sulphur

98 mg l-1

690 mg l-1

(NH4)2SO4, CaSO4, MgSO4

   Magnesium

41 mg l-1

114 mg l-1

MgSO4

   Sodium

50 mg l-1

12 mg l-1

NaCl

   Chloride

216 mg l-1

18 mg l-1

NaCl, CaCl2

   Silicium

351 mg l-1

 

Na2SiO3

   Boron

27 μg l-1

5.4 mg l-1

H3BO3

   Manganese

11 μg l-1

2.2 mg l-1

MnSO4

   Zinc

13 μg l-1

2.6 mg l-1

ZnSO4

   Copper

13 μg l-1

2.6 mg l-1

CuSO4

   Molybdenum

4.8 μg l-1

1.0 mg l-1

Na2MoO4

   Iron

112 μg l-1

 

FeSO4

  1. Composition of the hydroponic nutrient solutions. The basic nutrient solution was developed to resemble the pore water concentration of the major nutrient ions in the interior oligotrophic area of Water Conservation Area 2A of the Everglades. The P addition solution compensated for the uptake of nutrients by plants during growth and was added relative to the depletion of phosphorus by the plants.