Heterogeneity of Organic Matter of Aggregates of Protocalcic Chernozems

Холодов, В. А.; Farkhodov, Yu. R.; Yaroslavtseva, N. V.; Ziganshina, Aliya R.; Maksimovich, S. V.

doi:10.1134/s1064229322070067

Cited by 1 publication

(2 citation statements)

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“…Fractionation into labile and stable fractions of organic matter is based on different methods and may include physical separation of SOC according to particle size, density, aggregate, magnetic susceptibility, and also chemical treatment. The latter separates different SOC fractions on the basis of resistance to oxidation or by the destruction of the mineral phase, solubility, and hydrolysability [19,20]. The boundary between labile and stable SOM in many studies is given by the resistance to oxidation [21] using K2Cr2O7 as an oxidizing agent [22,23].…”

Section: Introductionmentioning

confidence: 99%

“…The following tasks were completed: (i) comparison of organic horizons in terms of the ash content, stocks of organic material, and quantification of the degree of litter decomposition; (ii) determination of CL, CO, and CS in the organic and mineral horizons and evaluation of vertical and spatial patterns in Fractionation into labile and stable fractions of organic matter is based on different methods and may include physical separation of SOC according to particle size, density, aggregate, magnetic susceptibility, and also chemical treatment. The latter separates different SOC fractions on the basis of resistance to oxidation or by the destruction of the mineral phase, solubility, and hydrolysability [19,20]. The boundary between labile and stable SOM in many studies is given by the resistance to oxidation [21] using K 2 Cr 2 O 7 as an oxidizing agent [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Labile and Stable Fractions of Organic Carbon in a Soil Catena (the Central Forest Nature Reserve, Russia)

Enchilik

Aseyeva

Semenkov

2023

Forests

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The composition of soil organic carbon (SOC) is an important soil quality indicator. We investigated the effect of site-specific soil-forming factors on plant debris and SOC properties along a soil catena with Retisols and Stagnosols in a mixed coniferous–deciduous forest. We examined sites at the summit and middle slope positions with relatively well-aerated soils and sites at footslope positions with waterlogged soils. The concentrations of labile and stable pools of SOC were determined using the method of three-stage chemodestruction. The degree of litter decomposition was calculated, and ash content was determined in the folic and histic soil horizons. The results of our study showed that SOC mostly accumulated in the forest litter and histic horizons of Stagnosols at the footslope positions. The forest litter, folic, and histic horizons were dominated by labile carbon. Equal concentrations of labile and stable carbon were typical of the mineral horizons. The location of the soil in the catena affects the partition and characteristics of SOC in umbric and albic soil horizons. SOC was found to be more stable in the soils at the footslope positions compared to the soils in other locations, because of the lower decomposition of plant remains. Larger stocks of organic carbon, including labile carbon, were restricted to the footslope catena positions.

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