This study aims to review and integrate the determining factors and mechanisms of soil organic matter (SOM) stabilisation in andic compared with other (non-andic) soil types. The AA. have reviewed recent literature regarding the nature of SOM
and its stabilisation processes in the top- and sub-soil to address and discuss the interaction between the SOM and the mineral phase. The carbon (C) storage capacity by the metal-humus-complex formation of volcanic soils is also evaluated. The most
important stabilisation processes are related to the incorporation and decomposition of microbial-derived C along with the changing C storage capacity with increasing soil development. The priming and destabilisation of adsorbed SOM are crucial mechanisms
influencing the soil C sequestration in subsoils. Al and Fe oxides are the main stabilising agents in andic soils. The influence of climate, mineralogy and soil disturbances on the SOM storage capacity of andic soils also require further attention.
Here, the AA. show undisturbed soil development, i.e. the processes of weathering and accumulation of soil organic matter (SOM), by comparing pristine with grazed sites in the high Andes (4500 m) of southern Peru. Plots with pristine vegetation were
temperatures and soil acidification. Both factors increased weathering in rangeland soils. Formation of pedogenic oxides with high surface area explained preservation of SOM, with positive feedback to acidification. With this work, the AA. present a conceptual
framework of positive feedback links between human-induced vegetation change, soil development and accumulation of SOM, which is only possible due to the unique baseline values of a pristine ecosystem.
To determine the relationship between soil organic matter (SOM) decomposition and chemistry in the permafrost region of the Qinghai-Tibet Plateau (QTP), 300-day laboratory incubations at 25°C and chemical fractionation were performed to characterise
the mineralisation dynamics of organic carbon from soils under 5 vegetation conditions. The respiration rates in wet meadows were the highest. After the incubation period, all 4 fractions of SOM (non-polarity soluble, water soluble, holocellulose and lignin contents
) showed some decline, and the SOM decreased by 16–20 per cent in soils of the steppe, meadow and wet meadow. These results suggest that a large proportion of the organic matter in soils of the permafrost region in the QTP is mineralisable. Based
. In conclusion, the progressive deterioration of orchard soil quality over time was the outcome of poor/inadequate management of soil organic matter (SOM) in guava and sapota orchards.
The origins of particulate organic matter (OM) preserved within lacustrine sediments of 3 lakes were investigated by coupling optical observations (palynofacies) and bulk geochemistry (Rock-Eval 6 pyrolysis). Soil organic matter (SOM) was sampled