Organic Matter Fractions and Quality of the Surface Layer of a Constructed and Vegetated Soil After Coal Mining. I - Humic Substances and Chemical Characterization

Leal, Otávio dos Anjos; Castilhos, Rosa Maria Vargas; Pauletto, Eloy Antônio; Pinto, Luiz Fernando Spinelli; Fernandes, Flavia Fontana; Penning, Letiane Helwig; Rosa, Carla Machado da

doi:10.1590/01000683rbcs20140783

Cited by 8 publications

(7 citation statements)

References 18 publications

(23 reference statements)

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“…This reflects the good adaptability of the grass species to the unfavorable growth conditions of this constructed soil and to the commonly adverse climate features in the experimental area, with frequent frost in the winter and high temperatures and little rainfall in the summer. These data are consistent with those of Leal et al (2015a), in that the 0.00-0.03 m layer of a soil constructed after coal mining and covered with grasses for six years contained a 79 % higher TOC stock than a bare constructed soil.…”

Section: Effect Of Cover Crops On Toc and Om Fractionssupporting

confidence: 89%

“…Due to the movement of the surface horizons during soil withdrawal (pre-extraction of coal), storage and subsequent deposition as surface layer of the constructed soil, these soils usually have high degradation and compaction levels, low fertility and a particularly poor quality of organic matter (OM), hampering the recovery of soil quality (Corrêa, 2009;Stumpf et al, 2014a;Leal et al, 2015a;Miola et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining

Leal

Castilhos

Pinto

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Revegetation is essential to improve the quality of constructed soils. This study investigated effects of perennial grasses on total organic carbon (TOC) stock, organic matter (OM) fractions and on quality of a recently constructed soil, after coal mining. Soil samples were collected from the 0.00-0.03 m layer two years after the beginning of the experiment. The treatments consisted of Cynodon dactylon cv vaquero (T1); Urochloa brizantha (T2); Panicum maximun (T3); Urochloa humidicola (T4); Hemarthria altissima (T5); Cynodon dactylon cv tifton (T6); bare constructed soil (T8); and natural soil (T9). The treatments with grass species increased the TOC stock by 57 % and increased the OM lability in comparison with T8. Higher C accumulation in the coarse and free light fractions and a higher C management index were observed in T2 and T3, indicating greater suitability of these species for the initial recovery of OM of the constructed soil.

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Section: Effect Of Cover Crops On Toc and Om Fractionssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining

Leal

Castilhos

Pinto

et al. 2016

Rev. Bras. Ciênc. Solo

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“…A few studies only analysed the upper soil layer between 0 and 10 cm. Given the high variability of sequestration in the topsoil layer, we considered this data to be a valuable contribution and incorporated the raw data provided by these studies ( 63, 74,75,92,96 ). To generate comparable values in all other categories, we determined the SOC stock values categorised by layer thickness using the following Eq.…”

Section: Data Source Collection and Categorisationmentioning

confidence: 99%

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Baier

Modersohn

Jalowy

et al. 2022

Preprint

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Opencast coal mining results in high loss of soil organic carbon (SOC), which may be restored via recultivation. Common methods include liming, topsoil application, and phytoremediation. It remains unclear, however, which parameters determine the effectiveness of varying recultivation strategies especially regarding SOC sequestration. We, therefore, analysed the relationship between SOC stock changes in abandoned coal mines and the recultivation method, soil properties (pH, texture, depth), climate, and time under recultivation in 51 studies (404 data entries). All included climatic regions recorded increases in SOC stocks, with tropical soils showing the highest potential for relative gains of up to 468%. With respect to soil texture, clay content is the main factor promoting SOC sequestration. Strategy-wise, the largest positive effect was achieved by forest with liming (1.5 Mg ha− 1 a− 1), fallow after topsoil and fertiliser addition (1.1 Mg ha− 1 a− 1), agriculture after topsoil addition (1.0 Mg ha− 1 a− 1), and forest with fertiliser (1.0 Mg ha− 1 a− 1) with a response ratio of 35%, 58%, 140%, and 48%, respectively. Soil depths < 10 cm, < 20 cm, and 21–40 cm stored more SOC (0.6 Mg ha− 1 a− 1, 1.0 Mg ha− 1 a− 1, and 0.4 Mg ha− 1 a− 1; response ratio of 123%, 68%, and 73%, respectively) than soils at a depth of 41–80 cm (0.1 Mg ha− 1 a− 1; response ratio of 6%). In terms of pH, strongly acidic soils (pH < 4.5) and alkaline conditions (pH > 7) offered the most beneficial environment for SOC sequestration at 0.4 Mg ha− 1 a− 1 and 0.8 Mg ha− 1 a− 1, respectively (44% and 67% response).

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“…In general, the C HCl content varied slightly, from 0.20 to 0.30 mg g -1 soil, and differences between treatments were not observed (Table 4). The C HCl fraction is composed of labile organic compounds, mainly from microbial activity and root exudates, which have weak association with soil minerals and with each other, and therefore are easily decomposable (Stevenson, 1994;Leal et al, 2015). In fact, the C HCl fraction represented only 4-5 % of the soil C ox (Figure 1).…”

Section: Carbon Distribution In Organic Matter Fractionsmentioning

confidence: 99%

Humic Substances and Chemical Properties of an Acrisol Amended with Vermicomposted Vegetal and Animal Residues

Antunes

Leal

Castilhos

et al. 2019

Rev. Bras. Ciênc. Solo

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Vermicomposted vegetal and animal residues are rich in nutrients and humic substances and thus can be applied to the soil as a source of functionalized organic matter (OM) and as an alternative to chemical fertilizers. In Southern Brazil, many animal and vegetal residues are easily accessible. Therefore, this study aimed to evaluate alterations in soil chemical properties and OM chemical composition in response to the application of local vermicomposted residues. The vermicomposts of: cattle manure (CM), sheep manure (SM), rice parboiling sludge (PS), CM+PS; SM+PS; CM+food waste (FW); SM+FW; CM+fruit waste (FRW); and SM+FRW were mixed with Acrisol (Argissolo) samples collected at 0.00-0.20 m layer, and the samples were incubated in plastic bags for 182 days. Soil samples without vermicomposts were also incubated (control). Overall, vermicomposts increased soil pH(H 2 O), exchangeable Ca and available P and K contents. The treatments with CM or SM with FW promoted carbon accumulation in the soil compared to the control, especially as humin. The humic acids of SM and PS were more oxygenated than the others, and oxygenation was apparently associated with aromatic structures. Fulvic acids of CM+PS showed the greatest oxygenation and aliphatic character. The relationship between vermicompost origin (animal or vegetal) and soil properties or OM composition was not clear. Aromaticity degree (H/C) and C/N ratio were similar in fulvic and humic acids, and oxygenation degree (O/C) as well as polarity index [(O+N)/C] were more efficient parameters to distinguish these humic fractions. We concluded that vermicomposts derived from cheap and easily available vegetal and animal residues in Southern Brazil have great potential as alternative fertilizers as well as sources of functionalized OM when applied to the soil, especially vermicomposts of rice parboiling sludge and cattle or sheep manure mixed with food waste.

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Organic Matter Fractions and Quality of the Surface Layer of a Constructed and Vegetated Soil After Coal Mining. I - Humic Substances and Chemical Characterization

Cited by 8 publications

References 18 publications

Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining

Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining

Effects of recultivation on soil organic carbon sequestration in abandoned coal mining sites: a meta-analysis

Humic Substances and Chemical Properties of an Acrisol Amended with Vermicomposted Vegetal and Animal Residues

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