Equilibre Melon.xlsx

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Calcul de la solution nutritive

Elément Chimique

Engrais

NH4 H2PO4 KNO3 HNO3 Ca(NO3)2 MgSO4

MAP Nitrate de potasse Acide Nitrique (1,4 nitrate de calcuim sulfate de magnési

Eléments Chimiques Masse Atomique Equilibre Besoin en mg/l Besoin en meq/l

meq / l

NO3 62 0.94 150 10.69

Masse Poids (g/m3) Atomique (g)

0.66 3.88 1.43 5.38 2.34

115.00 101.00 89.00 164.00 120.37

NH4 14 0.06 9 0.66

H2PO4 71 0.3 47 0.66

76.30 392.30 127.00 883.00 281.90

K2O 47

K+ 39 1.15 182 3.88

compostion de la solution nutritive souhaite

Concentration en azote 159 mg/l dont 6 % sous forme 159 Equilibre 1- 0,3-1,15 - 0,95-0,29 soit en mg /l ou g/m3 H+ NO3H2PO4SO4-Objectif

NH+ 1.43

K+ 3.88

Ca++ 5.38

Mg++

0.66 2.34 1.43

0.66

3.88

5.38

Cao 28

Ca++ 20 0.95 151 5.38

mg/l dont 6 % sous forme ammoniacale

Objectif 10.69 0.66 2.34

Mgo 20

Mg++ 12 0.29 46.8 2.34

H+ 89

SO4 48.12

127 1.43

113 2.34

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