Black Carbon and Its Effect on Carbon Sequestration in Soil

Kopecký, Marek; Kolář, Ladislav; Váchalová, Radka; Konvalina, Petr; Batt, Jana; Mráz, Petr; Menšík, Ladislav; Hoang, Trong Nghia; Dumbrovský, Miroslav

doi:10.3390/agronomy11112261

Cited by 5 publications

(2 citation statements)

References 52 publications

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“…Only black carbon fraction, in particular, is difficult to decompose. Therefore, it is generally considered to be a stable fraction [42,43]. Another organic matter is more or less degradable.…”

Section: Discussionmentioning

confidence: 99%

Fractionation of Soil Organic Matter into Labile and Stable Fractions

et al. 2021

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The present study aims to test and evaluate the efficiency of a new modified method of organic matter evaluation. It allows the assessment of the quality and quantity of the primary soil organic matter and the stable organic fractions separately. The new method was tested in six soil samples of different localities in the Czech Republic. This method is based on observing reaction kinetics during the oxidation of soil organic matter and measuring the cation-exchange capacity of stable organic fractions. The results were compared with classical methods, which rely on the isolation of humic substances, determination of the content of humic acids and fulvic acids and their ratio CHA:CFA, quotient E4/6, and fractionation of soil organic matter according to resistance to oxidation. It turned out that the results of the new modified method are more sensitive in comparison with the results obtained by classical procedures. The linear regression demonstrated the dependence between the amounts of soil organic matter determined by the classical method compared with the modified method. Moreover, the new modified method was found to be faster and not demanding on laboratory equipment. The new method has been improved to be easily repeatable, and some shortcomings of the previous method were eliminated. Based on our results and other recent studies, the modified method may be recommended for the practical evaluation of soil organic matter conditions.

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Section: Discussionmentioning

confidence: 99%

Fractionation of Soil Organic Matter into Labile and Stable Fractions

et al. 2021

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“…Although many previous studies have examined the soil BC content, most of them focused on forest, agricultural, and desert soils, rather than on BC in urban soil with a large human population [11,17,[22][23][24][25][26][27][28]. In addition, there are limited reports on the soil BC content in cities in China; research has mainly focused on the old industrial cities of Xuzhou and Anshan in north China [4,29] and Shanghai and Nanjing in east China [13,18].…”

Section: Introductionmentioning

confidence: 99%

Effects of Urbanization Intensity on the Distribution of Black Carbon in Urban Surface Soil in South China

Wang

Liu

et al. 2022

Forests

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Rapid urbanization causes the accumulation of large amounts of pollutants, including heavy metals, organic pollutants, and black carbon (BC). BC is the carbonaceous residue generated from the incomplete combustion of fossil fuels and biomass. It plays an important role on the migration of heavy metals and organic pollutants, as well as soil carbon sequestration. BC accumulation due to human activities greatly affects the global carbon budget, helps to drive climate change, and damages human health. To date, few studies have examined how the intensity of urbanization affects the distribution of BC in soils in urban areas. Therefore, the objective of this study is to determine the effects of urbanization intensity on the spatial distribution and content of BC in urban surface soil. We collected samples from 55 sites in South China and used a multi-scale geographical regression model to evaluate the impact of the interference intensity of urbanization on the amount and distribution of BC. Our results showed that the BC content was significantly higher in urban areas (9.74 ± 1.18 g kg−1) than in rural areas (2.94 ± 0.89 g kg−1) and that several urban parks with a higher interference intensity were hotspots of BC accumulation, suggesting that urbanization promoted BC accumulation. Our model revealed that road density was significantly and positively correlated with BC accumulation. Because there are more cars driving in areas with high road density, vehicle emissions may be one of the causes of BC accumulation. Our results also indicated that the impact of urbanization intensity on the BC distribution was sensitive to sampling density.

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