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Samenvatting Bodemkunde | Chemische bodemeigenschappen | Hogeschool Gent | 2025/26

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Studieaantekeningen uit Bodemkunde (Hoofdstuk 5) aan Hogeschool Gent, gericht op agro- en biotechnologie studenten. Het document behandelt chemische bodemeigenschappen zoals pH-meting (pH-H2O en pH-KCL), bufferend vermogen, elektrische geleidbaarheid (EC), en de invloed van pH op nutriëntbeschikbaarheid en gewasgroei. Nuttig voor tentamenvoorbereiding en praktijktoepassing van bodemanalyse in voedingstechnologie.

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Bodemtechnologie Chemische bodemeigenschappen



Hoofdstuk 5: Chemische
bodemeigenschappen
Inhoud
1.1 pH van de bodem................................................................................2
1.2 CEC van de bodem..............................................................................5
1.3 EC.......................................................................................................8




1

, Bodemtechnologie Chemische bodemeigenschappen


1.1 pH van de bodem
Betekenis:

 Maat voor de protonenconcentratie in de
bodem
 Varieert van 0 tot 14 (protonenconcentratie van 10^0 tot 10^-14 M)

pH meten

 Meten via pH-elektrode
 Door bodem in oplossing te brengen
o In water (reële pH)
o In KCL (potentiële pH)

pH-H2O

 Meet reële pH
 Protonenconcentratie in zuiver water
 Sterk fluctuerend
o Stijgt doobekalking
o Daalt door bemesting/nitrificatie

pH-KCL

 Meet potentiële pH
 Protonenconcentratie in KCL-oplossing
o Meet ook protonengebonden aan KHC
 Carboxylgroepen (COOH)
 Fenol (fenyl-OH)
 Si-OH, Al-OH
 Vrijwel constant gedurende het jaar
 0,3-1,5 lager dan pH-H20
 Af te lezen op bodemanalyses

pH-bufferend vermogen

 Bufferend vermogen hoogst bij klei en veengronden
 Titratiecurve bekomen door toevoegen van bv.
Ca(OH) 2




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