Free Lipid Biomarkers in Anthropogenic Soils

Atanassova, Irena; Harizanova, Milena; Banov, M.

doi:10.1007/978-981-13-8570-4_9

Cited by 2 publications

(3 citation statements)

References 102 publications

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“…In our previous work (Petkova et al, 2018), biochar amendment on the Alluvial Meadow Soil (Fluvisol) from the experimental field of the "N. Poushkarov" Institute of Soil Science, Agrotechnologies and Plant protection in Bulgaria on which wheat and maize were cultivated in crop rotation, led to stimulation of soil microflora and increased CO2 emission. In another study on the same experimental field (Atanassova et al, 2020) on a Fluvisol amended with 3 t/ha biochar, alkanes distribution was in the range < nC24 with prevailing "even" over "odd" predominance (EOP) of the homologues. The free lipid signature revealed anthropogenic and/or microbial sources of soil organic matter, due to the presence of both short chain compounds, e.g.…”

Section: Introductionmentioning

confidence: 91%

“…In our studies of organic geochemical markers composition in anthropogenic and technogenic soils (Atanassova and Mills, 2016;Atanassova et al, 2020), a wide variety of organic markers and metabolites were analyzed, incl. contaminants that are "free", "neutral" and "labile", and not "bound" in the soil matrix, therefore are more prone to release or degradation in the environment.…”

Section: Introductionmentioning

confidence: 99%

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Changes in organic molecular marker signatures in soils amended with biochar during a three-year experiment with maize on a Fluvisol

Atanassova

Harizanova

Benkova

et al. 2022

Journal of Hydrology and Hydromechanics

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Biochar is widely used as a soil amendment to improve soil properties and as a tool to absorb net carbon from the atmosphere. In this study we determined the signatures of organic molecular markers in soil following the incorporation of 5 and 10 t/ha biochar in a Fluvisol, cultivated with maize at the experimental field of the ISSAPP “N. Poushkarov” institute in Bulgaria. The n-alkane distribution in the biochar treated soils was uni- or bimodal maximizing at n-C17 alkane, n-C18 or C18 branched alkanes, i.e. there was an imprint of biomass burning, e.g. from the biochar due to predominance of short chain (< C20) homologues and increased microbial activity (presence of branched alkanes). This is also confirmed by the values for the average chain length (ACL) of n-alkanes which indicated prevalence of homologues of shorter chain (20–21 C atoms) in the variants of longer biochar residence time. There was evidence of trans-13-docosenamide, which originated from biochar. Fatty acids and fatty alcohols distributions also implicate microbial contribution to soil organic matter (SOM), supporting the suggestion that biochar addition can improve soil microbiological status.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Changes in organic molecular marker signatures in soils amended with biochar during a three-year experiment with maize on a Fluvisol

Atanassova

Harizanova

Benkova

et al. 2022

Journal of Hydrology and Hydromechanics

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“…In Bulgaria, the studies of biochar are scarce and insufficient (Mikova, 2014;Stoimenov et al, 2015;Kercheva et al, 2018;Petkova et al, 2018;Simeonova et al, 2019;Atanassova et al, 2020;Benkova et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Influence of biochar addition to fluvisol on maize yield and soil microbiota

Benkova¹,

NENOVA²,

SIMEONOVA³

et al. 2022

JCEA

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A three-year field experiment with maize was carried out on fluvisol. The aim of the present study was to evaluate the impact of biochar on maize yield at different levels of water stress and its effect on the amount of soil microorganisms.The following variants were studied: control with no biochar addition, and variants with biochar. Biochar was applied in 2 t/ha in 2016, produced by pyrolysis of rice straw, then in 3 t/ha in 2017 and 10 t/ha in 2018, both obtained by pyrolysis of oak bark. These variants were divided into three more depending on the irrigation regime: i.e. non-irrigated, irrigation at dT>0 °C, and irrigation at dT<-1 °C. Under non-irrigated conditions, the effect of biochar on maize yield was not pronounced over three years. Under irrigation conditions with water added according to crop water stress, higher yields of maize were obtained in the third year when biochar application to the soil was highest (10 t/ha). Also, yield was higher when faster (at lower water stress dT<-1 °C) irrigation rates were applied. Soil moisture changed slowly in the biochar variants and the best values of the temperature differences were obtained for irrigation at dT<-1 °C in 2018.These results showed that the influence of biochar on soil microbiota was significantly greater, and the most stimulating effect of biochar was obtained for bacterial populations.

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Free Lipid Biomarkers in Anthropogenic Soils

Cited by 2 publications

References 102 publications

Changes in organic molecular marker signatures in soils amended with biochar during a three-year experiment with maize on a Fluvisol

Changes in organic molecular marker signatures in soils amended with biochar during a three-year experiment with maize on a Fluvisol

Influence of biochar addition to fluvisol on maize yield and soil microbiota

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