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1.3.1 Croplands

Оглавление

Soils underlying arable croplands typically possess low carbon soil contents (less than about 150 t C ha−1), because they are either under cultivation or have been cultivated in the past [14]. Typically, such soils are maintained under the condition that causes them to lose their carbon to the atmosphere and by leaching at a rapid rate. they present a major challenge for sustainable future sequestration of carbon in soils.

Table 1.1 Estimated soil carbon complements in the top 1 m of common vegetated systems. The ranges provided indicate uncertainty in the global average carbon density for each major vegetated system considered (after Hester et al., 2010) [14].

Ecosystem Carbon density (t C ha-1)
Wetland 643
Cropland (arable) 80–122
Tundra 127–206
Deserts and semi-deserts 42–57
Temperate grassland and shrubland 99–236
Tropical savanna and grassland 90–117
Boreal forest 247–344
Temperate forest 96–147
Tropical forest 122–123
Applied Soil Chemistry

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