Soil chemical properties and organic matter composition of a subtropical Cambisol after charcoal fine residues incorporation

Leal, Otávio dos Anjos; Dick, Deborah Pinheiro; Lombardi, Kátia Cylene; Maciel, Vanessa Gonçalves; González‐Pérez, José Antonío; Knicker, Heike

doi:10.1007/s11368-014-1040-z

Cited by 10 publications

(17 citation statements)

References 45 publications

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“…In a previous study, we observed favorable effects of the charcoal fines on soil fertility and consistent increase of SOM thermostability after charcoal incorporation into a subtropical Cambisol at a rate of 40 Mg ha −1 in Southern Brazil [27]. These findings are in line with above-mentioned literature and support the hypothesis that this residue deserves to be tested not only as a soil conditioner but, moreover, as a means to efficiently promote C sequestration in the soil.…”

Section: Introductionsupporting

confidence: 90%

“…About 45% of the used charcoal particles were smaller than 2 mm. The pyrolysis of the hardwood was performed under artisanal conditions, which might have contributed to its low fixed C (7.6%) and high volatile matter (84%) contents, as discussed in Leal et al [27]. These data characterize this material as low condensed charcoal produced at low temperatures [31].…”

Section: Site Description Experimental Design and Soil Samplingmentioning

confidence: 99%

“…These data characterize this material as low condensed charcoal produced at low temperatures [31]. The C (46.6%) and the N (1.0%) contents of the charcoal were determined by dry combustion, and its ash content (8.2%) was determined after heating at 750 • C during 4 h. A more exhaustive physicochemical characterization of the charcoal is available in Leal et al [27].…”

Section: Site Description Experimental Design and Soil Samplingmentioning

confidence: 99%

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Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability

et al. 2019

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Biochar has been shown as a potential mean to enhance carbon sequestration in the soil. In Brazil, approximately 15% of the produced charcoal is discarded as charcoal fines, which are chemically similar to biochar. Therefore, we aimed to test charcoal fines as a strategy to increase soil carbon sequestration. Charcoal fines of hardwood Mimosa scabrella were incorporated into a Cambisol down to 10 cm (T1 = 0 and T4 = 40 Mg ha−1) in Southern Brazil. Soil samples were collected (0–30 cm) 20 months after charcoal amendment. Soil organic matter (SOM) acid extract, humic acid, fulvic acid, and humin fractions were separated. Solid-state 13C nuclear magnetic resonance (NMR) spectra from charcoal and SOM in T1 and T4 were obtained before and after 165 days of incubation under controlled conditions. Charcoal increased soil carbon as fulvic (10–20 cm) and humic acids (10–30 cm) and, especially, as humin (0–5 cm), which probably occurred due to the hydrophobic character of the charcoal. The 13C NMR spectra and mean residence times (MRT) measured from incubation essays indicated that the charred material decomposed relatively fast and MRT of T1 and T4 samples were similar. It follows that the charcoal fines underwent similar decomposition as SOM, despite the high charcoal dose applied to the soil and the high aryl C contribution (78%) to the total 13C intensity of the charcoal NMR spectra.

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Section: Introductionsupporting

confidence: 90%

Section: Site Description Experimental Design and Soil Samplingmentioning

confidence: 99%

Section: Site Description Experimental Design and Soil Samplingmentioning

confidence: 99%

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Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability

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“…The corresponding 13 C multi-CP/DD spectra (b, d, f, h, and j in Fig. 3) showed only the signals from nonprotonated carbons and carbons of mobile groups, such as COO/N-C=O, aromatic C-O, nonprotonated aromatics, OC q O, OCH 3 , CCH 3 , and mobile (CH 2 ) n groups (Leal et al 2015). The broader bands of mobile carbon groups, such as CCH 3 and -(CH 2 ) n -, were observed in the alkyl region around 0-24 and around 30 ppm, respectively.…”

Section: Solid-state 13 C Nmrmentioning

confidence: 99%

Carbon and nitrogen forms in soil organic matter influenced by incorporated wheat and corn residues

Chen

Mao

Zhang

et al. 2017

Soil Science and Plant Nutrition

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We have investigated molecular-scale changes in soil organic matter (SOM) as incorporated wheat and corn residues decompose and whether those changes are correlated with soil nitrogen forms. The 'initial litter quality hypothesis' that compositional variations in plant residues may persist during decomposition of these residues as they are transformed to SOM was tested. We studied soils in 6-year field experiments of a double-cropped corn-wheat rotation system designed with the following treatments: no crop residue and no chemical fertilizer, chemical fertilizer alone, wheat straw + chemical fertilizer, corn stover + chemical fertilizer, and corn plus wheat residue + chemical fertilizer. Organic carbon and nitrogen forms were assessed, and SOM chemical structures were examined by Fourier transform infrared and solid-state nuclear magnetic resonance spectroscopy. We found that concentrations of organic-N in corn residues plus fertilizer treatment were significantly larger than those in wheat straw plus fertilizer treatment. In addition, concentrations of amide groups and NCH in SOM with corn residue treatment were larger than those in SOM with wheat residue treatment. Incorporation of both corn and wheat residues led to an increase in carbohydrate-derived components of SOM. Compared with the check treatment, aromaticity, alkyl C/O-alkyl C, and hydrophobicity/hydrophilicity indices of the SOM were lower with addition of residue. Aromaticity was greater in corn residue treatment than in wheat residue treatment. This study provides support for the hypothesis that the variation in chemical composition of SOM reflected the incorporation of distinct chemical structures in wheat and corn straw residues. ARTICLE HISTORY

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“…Leal et al (2014) demonstrated the feasibility of applying this material as a soil fertilizer and as a stable C sink in subtropical Cambisols. In Brazil, one of the largest charcoal producers, this by-product accumulates in large amounts and solutions for environmentally acceptable use are required.…”

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confidence: 93%

Natural and anthropogenic pyrogenic carbon in Mediterranean ecosystems: the need for interdisciplinary learning and collaboration

2015

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Soil chemical properties and organic matter composition of a subtropical Cambisol after charcoal fine residues incorporation

Cited by 10 publications

References 45 publications

Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability

Charcoal Fine Residues Effects on Soil Organic Matter Humic Substances, Composition, and Biodegradability

Carbon and nitrogen forms in soil organic matter influenced by incorporated wheat and corn residues

Natural and anthropogenic pyrogenic carbon in Mediterranean ecosystems: the need for interdisciplinary learning and collaboration

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