Total and labile pools of soil organic carbon in cultivated and undisturbed soils in northern India

Total and labile pools of soil organic carbon in cultivated and undisturbed soils in northern India

Labile fractions of soil organic matter (SOM) have been used as indicators for land use induced changes in soil quality. Differences in soil C pools under row crop production and uncultivated soils may provide information about soil C sequestration. The impact of agroforestry consisting of poplar wi...

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Veröffentlicht in:Geoderma 2015-01, Vol.237-238, p.149-158
Hauptverfasser: Benbi, Dinesh K., Brar, Kiranvir, Toor, Amardeep S., Singh, Pritpal
Format: Artikel
Sprache:eng
Schlagworte:
Alterations
C sequestration
Carbon
Cultivation
Dehydrogenase activity
Indicators
Labile C fractions
Land use
Mineralizable C
Pools
Respiration
Soil (material)
Soil C pools
Soil organic C
Triticum aestivum
Water soluble C
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Zusammenfassung:Labile fractions of soil organic matter (SOM) have been used as indicators for land use induced changes in soil quality. Differences in soil C pools under row crop production and uncultivated soils may provide information about soil C sequestration. The impact of agroforestry consisting of poplar with wheat, rice–wheat, maize–wheat and sugarcane agro-ecosystems on total organic carbon (TOC) and labile pools, viz. water-extractable (WEOC), hot water-soluble (HWC), KMnO4-oxidizable, microbial biomass and mineralizable C; and organic C fractions of different oxidizability was studied at 22-sites for each land use. Cultivation resulted in decrease in TOC (21–36%) and dehydrogenase activity (by 2.8–3.4mgkg−1soilh−1) compared to uncultivated soils. Labile C pools, except WEOC, were correlated (P
ISSN:0016-7061
1872-6259
DOI:10.1016/j.geoderma.2014.09.002