Matching Estonian humus cover types’ (pro humus forms’) and soils’ classifications

Kõlli, Raimo; Rannik, Kaire

doi:10.1016/j.apsoil.2017.09.038

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…Extracted humic substances are mainly divided into humic acid (HA) and fulvic acid (FA) (Abakumov et al, 2013;Kõlli and Rannik, 2018); these substances are of great significance to soil fertility, nutrient cycling, and the sustainability of ecosystem productivity (Komarov et al, 2016). FAs are a group of substances that are more active than HAs due to their small molecular weight, aromaticity, and stronger acidity (Wen, 1984).…”

Section: Introductionmentioning

confidence: 99%

Effects of Litterfall on the Accumulation of Extracted Soil Humic Substances in Subalpine Forests

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Effects of Litterfall on the Accumulation of Extracted Soil Humic Substances in Subalpine Forests

et al. 2020

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“…This is in line with the research by Wei et al (2020), reporting that adding plant litter increased the soil's humic and fulvic acid content. Humic material plays an essential role in providing soil nutrients; humic material mainly consists of humic acid and fulvic acid; humic material is a crucial part of soil organic matter because it is closely related to soil carbon and nitrogen (Kõlli and Rannik, 2018).…”

Section: Carbon Fractionsmentioning

confidence: 99%

Carbon Stock, Carbon Fraction and Nitrogen Fraction of Soil Under Bamboo (Dendrocalamus asper Back.) and Non-Bamboo Vegetation

Pambayun,

Purwanto,

Utami

2023

Caraka Tani J. Sustain. Agric.

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The type of vegetation and soil organic matter affect the carbon fraction, nitrogen fraction and soil carbon stocks that contribute to the global carbon cycle. Therefore, the calculation of the composition of the fractions in different land covers is very important as a potential indicator of the effect of land management practices on soil organic carbon dynamics and supports the reduction of carbon dioxide (CO2) and soil carbon storage. This research aimed to determine the composition of the carbon fraction, nitrogen fraction and soil carbon stock in different land cover. There were six types of land cover with vegetations of 10-year-old bamboo, 30-year-old bamboo, 50-year-old bamboo, bulrush, a mixture of brushwood and bulrush, and a mixture of Albizia falcataria and brushwood, each of which was sampled three times. Soil samples were used to determine microbial biomass, particulate organic, humic acid, fulvic acid and soil carbon stock. The six land cover types showed significant differences in all fractions and soil carbon stocks. Fifty-year-old bamboo vegetation has the highest carbon storage of 0.029 g g-1 soil. The stable carbon fraction, in the form of humic acid and fulvic acid, in 50-year-old bamboo vegetation is more excellent than that in other vegetation. This study shows that 50-year-old bamboo vegetation has the potential to sequester carbon and store carbon in forms that decompose slowly, namely humic acid and fulvic acid, in the soil for a longer period.

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“…Thus, forest litter may have variable physico-chemical and biological properties [7,27] and may influence the rates of nutrient cycling [28], carbon sequestration [29], soil acidification and base leaching [5,30]. Therefore, the forest litter may influence the direction and rate of soil formation or transformation [31,32]. Moreover, the surface organic layer may accumulate trace metals and other xenobiotics from industrial or traffic emissions [33][34][35][36][37][38] and, therefore, must be included in the ecological and health risk assessments [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

New Topsoil Sampler for the Assessment and Monitoring of Forest Soil Contamination

Kabała

Gałka

Yurkouski

2021

Forests

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The forest litter and underlying mineral topsoil are typically sampled and analyzed separately although they are in a dynamic balance, which ensures macro- and microelement cycling in the forest ecosystem, including the flux and accumulation of xenobiotics in the contaminated sites. Although the national legal regulations specify single limits of element concentration for the entire “topsoil” layer, irrespectively of the kind of materials resting at the earth surface down to the specified depth, the direct analysis of bicomponent forest topsoil (litter + mineral topsoil) was problematic because of the lack of a suitable sampler. The paper presents a comparative analysis of Cu, Pb, and Zn concentrations in the forest topsoil layers (0–25 cm), sampled using a new construction sampler invented for a joint collection of the litter layer and underlying mineral layer (to the specified depth). Litter samples (using a steel frame), mineral topsoil samples (0–25 cm, using gouge auger after litter removal), and mixed topsoil samples (0–25 cm, including litter) were collected in 16 replicates from four variably contaminated plots (copper mining and smelting area) afforested with poplar or pine. Pseudo-total concentration of Cu, Pb, and Zn was analyzed after sample digestion in aqua regia. The concentration of elements in the samples consisting of jointly collected litter and mineral layer was noticeably higher than in the samples consisting of the mineral topsoil only, which confirmed the effective inclusion of the litter. The concentrations of trace elements measured in the samples of jointly collected litter and mineral topsoil did not differ (NIR Fisher test at p < 0.05) from the concentrations calculated using the data for litter and mineral soil separately collected and analyzed, which confirmed the usefulness of the new sampler for reliable collection of the forest topsoil samples without skipping any material which may influence the results of soil contamination assessment and risk assessment.

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Matching Estonian humus cover types’ (pro humus forms’) and soils’ classifications

Cited by 7 publications

References 3 publications

Effects of Litterfall on the Accumulation of Extracted Soil Humic Substances in Subalpine Forests

Effects of Litterfall on the Accumulation of Extracted Soil Humic Substances in Subalpine Forests

Carbon Stock, Carbon Fraction and Nitrogen Fraction of Soil Under Bamboo (Dendrocalamus asper Back.) and Non-Bamboo Vegetation

New Topsoil Sampler for the Assessment and Monitoring of Forest Soil Contamination

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