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Samenvatting van het vak Inleiding Bodemkunde aan UGent. Samenvatting bestaat slides, notities, extra uitleg en het boek 'Bodem & bodemkunde voor tuin, landbouw en milieu' (Verheye & Ameryckx, 2007).
• Lessen en slides van Prof. Rudi Goossens (2023)
• Bodem & bodemkunde voor tuin, landbouw en milieu (Verheye & Ameryckx, 2007)
Academiejaar 2022-2023
,INHOUDSTAFEL
INLEIDING ............................................................................................................................ 4
ALGEMEENHEDEN OVER DE BODEM............................................................................................. 4
Definities .................................................................................................................................. 4
Functies.................................................................................................................................... 5
Algemeen......................................................................................................................................... 5
Specifieke impact op socio-economisch leven ................................................................................ 6
Eigenschappen ......................................................................................................................... 6
BODEMVORMENDE FACTOREN .................................................................................................. 8
Gesteente of moedermateriaal ................................................................................................. 9
Klimaat................................................................................................................................... 10
Primaire klimaatseffecten ............................................................................................................. 10
Temperatuur .............................................................................................................................. 10
Water ......................................................................................................................................... 11
Wind .......................................................................................................................................... 12
Secundaire klimaatseffecten ......................................................................................................... 12
Neerslag op weinig of onbedekt oppervlak ............................................................................... 12
Dauw en temperatuurverschillen .............................................................................................. 12
Wind .......................................................................................................................................... 12
Biologische activiteit ............................................................................................................... 13
Flora ............................................................................................................................................... 14
Activiteit van flora ..................................................................................................................... 14
Voorbeeld zonale bodems in Rusland ........................................................................................ 14
Fauna ............................................................................................................................................. 20
Micro-organismen ......................................................................................................................... 20
Mens ...................................................................................................................................... 20
Topografie of reliëf ................................................................................................................. 22
Verschillende schalen .................................................................................................................... 22
Voorbeeld dwarsdoorsnede .......................................................................................................... 22
Effect van reliëfverschillen ............................................................................................................ 23
Tijd......................................................................................................................................... 23
Impact van de tijdsfactor............................................................................................................... 23
Resultaat van de tijdsfactor........................................................................................................... 23
PEDOGENESE OF BODEMVORMING ........................................................................................... 25
Fysische of mechanische verwering ......................................................................................... 25
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, Eerste vorm: temperatuur- en vochtverschillen ........................................................................... 25
Tweede vorm: schurende verwering van zand of water (erosie) ................................................. 26
Derde vorm: massaverplaatsing van materiaal door water en wind ............................................ 26
Chemische verwering.............................................................................................................. 27
Oplossing ....................................................................................................................................... 27
Hydratatie ...................................................................................................................................... 28
Hydrolyse ....................................................................................................................................... 28
Oxidatie en reductie ...................................................................................................................... 28
Biologische verwering ............................................................................................................. 29
Interacties .............................................................................................................................. 30
Vb 1: interactie met de mens: Vlaamse Zandstreek en Kempen .................................................. 30
Vb 2: zeepolders ............................................................................................................................ 31
HET BODEMPROFIEL ............................................................................................................. 32
INDIVIDUELE BODEMKARAKTERISTIEKEN ..................................................................................... 35
Textuur of korrelgroottesamenstelling .................................................................................... 36
Textuurdriehoek ............................................................................................................................ 36
Belang van de bodemtextuur ........................................................................................................ 37
Bodemstructuur ..................................................................................................................... 39
Bodemstructuur bovengrond ........................................................................................................ 39
Bodemstructuur ondergrond ........................................................................................................ 40
Structuurverval .............................................................................................................................. 40
Structuurverbetering ..................................................................................................................... 41
Bodemcompactie.................................................................................................................... 42
Bodemkleur............................................................................................................................ 43
Humus- en stikstofgehalte ...................................................................................................... 44
Factoren van humificatie ............................................................................................................... 45
Samenstelling en eigenschappen van humus ............................................................................... 45
Classificatie van humus ................................................................................................................. 46
Belang van humus ......................................................................................................................... 46
Het bodemsorptiecomplex (ex!!!) ........................................................................................... 48
Vastleggingsvermogen of sorptiecapaciteit .................................................................................. 48
Uitwisselingsvermogen ................................................................................................................. 49
Basenverzadiging ........................................................................................................................... 49
Zuurtegraad of pH .................................................................................................................. 50
Bodemporiën ......................................................................................................................... 52
Bodemlucht ............................................................................................................................ 53
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, Bodemwater .......................................................................................................................... 54
Waterdynamiek in de bodem ........................................................................................................ 54
Beweging van doorsijpelend water ........................................................................................... 54
Beweging van grondwatertafel ................................................................................................. 55
Soorten water in de bodem .......................................................................................................... 56
Belangrijke watergehalten ............................................................................................................ 58
pF-curve ......................................................................................................................................... 60
Grondwater ................................................................................................................................... 61
Belang van bodemwater ............................................................................................................... 63
BODEMCLASSIFICATIE EN -KARTERING........................................................................................ 65
Classificatie ............................................................................................................................ 65
Internationale classificaties ..................................................................................................... 66
Soil Taxonomy ............................................................................................................................... 66
De 12 ordes ................................................................................................................................ 67
Andere internationale classificatie: WRB ...................................................................................... 72
Nationale en lokale eenvoudige systemen ............................................................................... 72
Technieken van kartering ........................................................................................................ 73
Kaartschaal............................................................................................................................. 73
BODEMKAART VAN BELGIË ..................................................................................................... 74
Historiek................................................................................................................................. 74
Kaartlegende en bodemserie .................................................................................................. 75
Textuur .......................................................................................................................................... 75
Afgeleide series.......................................................................................................................... 76
Drainageklasse............................................................................................................................... 77
Profielontwikkeling........................................................................................................................ 78
Afgeleide series.......................................................................................................................... 79
Andere kaarteenheden ................................................................................................................. 79
Bodemkaart lezen................................................................................................................... 79
Polders ................................................................................................................................... 80
Bodemkaart ................................................................................................................................... 80
Ontstaan ........................................................................................................................................ 80
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