GTN May/June 2021 - Garden Trade News, UK

Page 23

The Peat Issue

Carbondynamics in drained peatlands under vegetation Balance: not enough carbon is removed from the atmosphere than emitted = small to large source

CH4

ATMOSPHERE

CO2 CO2

Drainage ditch

Aerobic peat

DOC/POC/DIC

Anoxic peat

Key:

CH4 - Methane, CO2 - Carbon Dioxide, DOC - Dissolved Organic Carbon, POC - Particulate Organic Carbon, DIC - Dissolved Inorganic Carbon, Areobic Peat - Peat above the water line where the living plant material becomes the dead material ready for decomposition. Anoxic Peat - peat that always stays wet where the decomposition and sequestration of carbon occurs. Carbondynamics in peatlands cut for horticultural peat Balance: no carbon is removed whatsoever; only emission = large source

ATMOSPHERE

CH4

CO2

CO2

Drainage ditch

Aerobic peat

DOC/POC/DIC

Anoxic peat www.gardentradenews.co.uk

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