Biodegradability of organic matter in fire-affected mineral soils of Southern Spain

Knicker, Heike; González-Vila, Francisco Javier; González-Vázquez, Rocío

doi:10.1016/j.soilbio.2012.02.021

Cited by 74 publications

(44 citation statements)

References 36 publications

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“…Similar results were found by Babujia et al 2010. The emission of the CO 2 -C results from the decay of the soil C, mainly the C-WSC, C-HA, C-FA, TOC-S, and C-HU fractions (Badía et al 2013;Knicker et al 2013). The emission of soil CO 2 -C in the absence of substrate is inversely related to the stored organic C and the potential loss of soil C (Cookson et al 1998).…”

Section: Effect Of Residue Incubation Time On the Co 2 -C Emissionsupporting

confidence: 64%

For how long does the quality and quantity of residues in the soil affect the carbon compartments and CO2-C emissions?

et al. 2016

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Purpose The mineralization/immobilization of nutrients from the crop residues is correlated with the quality of the plant material and carbon compartments in the recalcitrant and labile soil fractions. The objective of this study was to correlate the quality and quantity of crop residues incubated in the soil with carbon compartments and CO 2 -C emission, using multivariate analysis. Materials and methods The experiment was conducted in factorial 4 + 2 + 5 with three replicates, referring to three types of residues (control, sugarcane, Brachiaria, and soybean), and two contributions of the crop residues in constant rate, CR (10 Mg ha −1 residue), and agronomic rate, AR (20, 8, and 5 Mg ha −1 residue, respectively, for sugarcane, soybean, and Brachiaria), evaluated five times (1, 3, 6, 12, and 48 days after incubation). At each time, we determined the CO 2 -C emission, nitrogen and organic carbon in the soil, and the residues. In addition, the microbial biomass and water-soluble, labile, and humic substance carbons fractionated into fulvic acids, humic acids and humin were quantified.Results and discussion Higher CO 2 -C emissions occurred in the soil with added residue ranging from 0.5 to 1.1 g CO 2 -C m −2 h −1 in the first 6 days of incubation, and there was a positive correlation with the less labile organic soil fractions as well as residue type. In the final period, after 12 days of soil incubation, there was a higher relation of CO 2 -C emission with carbon humin. The sugarcane and soybean residue (20 Mg ha −1 ) promoted higher CO 2 -C emission and the reduction of carbon residue. The addition of residue contributed to an 82.32 % increase in the emission of CO 2 -C, being more significant in the residue with higher nitrogen availability. Conclusions This study shows that the quality and quantity of residue added to soil affects the carbon sequestration and CO 2 -C emission. In the first 6 days of incubation, there was a higher CO 2 -C emission ratio which correlates with the less stable soil carbon compartments as well as residue. In the final period of incubation, there is no effect of quality and quantity of residue added to soil on the CO 2 -C emission.

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Section: Effect Of Residue Incubation Time On the Co 2 -C Emissionsupporting

confidence: 64%

For how long does the quality and quantity of residues in the soil affect the carbon compartments and CO2-C emissions?

et al. 2016

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“…The biological activity associated with vegetation recovery has implications on the reduction of SWR ). Knicker et al (2013) observed that in fire-affected soils where there is no vegetation cover re-establishment and litter input, the different chemical composition of SOM and pyrogenic organic matter increase the SOM aromaticity with reduced solubility. The inputs of fresh litter from vegetation re-establishment replenish SOM and changes soil chemical composition towards that of an area unaffected by fire .…”

Section: Soil Water Repellencymentioning

confidence: 99%

Short-term changes in soil Munsell colour value, organic matter content and soil water repellency after a spring grassland fire in Lithuania

et al. 2014

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Abstract.Fire is a natural phenomenon with important implications on soil properties. The degree of this impact depends upon fire severity, the ecosystem affected, topography of the burned area and post-fire meteorological conditions. The study of fire effects on soil properties is fundamental to understand the impacts of this disturbance on ecosystems. The aim of this work was to study the short-term effects immediately after the fire (IAF), 2, 5, 7 and 9 months after a low-severity spring boreal grassland fire on soil colour value (assessed with the Munsell colour chart), soil organic matter content (SOM) and soil water repellency (SWR) in Lithuania. Four days after the fire a 400 m 2 plot was delineated in an unburned and burned area with the same topographical characteristics. Soil samples were collected at 0-5 cm depth in a 20 m × 20 m grid, with 5 m space between sampling points. In each plot 25 samples were collected (50 each sampling date) for a total of 250 samples for the whole study. SWR was assessed in fine earth (< 2 mm) and sieve fractions of 2-1, 1-0.5, 0.5-0.25 and < 0.25 mm from the 250 soil samples using the water drop penetration time (WDPT) method. The results showed that significant differences were only identified in the burned area. Fire darkened the soil significantly during the entire study period due to the incorporation of ash/charcoal into the topsoil (significant differences were found among plots for all sampling dates). SOM was only significantly different among samples from the unburned area. The comparison between plots revealed that SOM was significantly higher in the first 2 months after the fire in the burned plot, compared to the unburned plot. SWR of the fine earth was significantly different in the burned and unburned plot among all sampling dates. SWR was significantly more severe only IAF and 2 months after the fire. In the unburned area SWR was significantly higher IAF, 2, 5 and 7 months later after than 9 months later. The comparison between plots showed that SWR was more severe in the burned plot during the first 2 months after the fire in relation to the unburned plot. Considering the different sieve fractions studied, in the burned plot SWR was significantly more severe in the first 7 months after the fire in the coarser fractions (2-1 and 1-0.5 mm) and 9 months after in the finer fractions (0.5-0.25 and < 0.25 mm). In relation to the unburned plot, SWR was significantly more severe in the size fractions 2-1 and < 0.25 mm, IAF, 5 and 7 months after the fire than 2 and 9 months later. In the 1-0.5-and 0.5-0.25 mm-size fractions, SWR was significantly higher IAF, 2, 5 and 7 months after the fire than in the last sampling date. Significant differences in SWR were observed among the different sieve fractions in each plot, with exception of 2 and 9 months after the fire in the unburned plot. In most cases the finer fraction (< 0.25 mm) was more water repellent than the Published by Copernicus Publications on behalf of the European Geosciences Union. P. Pereira et al.: Sho...

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“…Biochar, a solid elemental carbonaceous material, from the thermochemical conversion of biomass in an oxygen-limited environment (IBI, 2012), is a much more durable form of C than parent plant biomass or most forms of C in soil organic matter (Lehmann et al, 2009;Zavalloni et al, 2011;Santos et al, 2012;Knicker et al, 2013). Hence, the application of biochar to soil has been proposed for increasing the stable C pool and restraining the growth of atmospheric CO 2 concentration (Lehmann, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The slow mineralisation rate of biochar is largely attributed to its chemical recalcitrance (McBeath and Smernik, 2009) and to some extent to it may occur from biochar's interactions with soil clay minerals (Luo et al, 2011;Fang et al, 2014a). Consequently, it has been demonstrated that the MRT of biochar in soils are in the range of centuries to millennia (Kuzyakov et al, 2009;Major et al, 2010;Zimmerman, 2010;Santos et al, 2012;Singh et al, 2012;Knicker et al, 2013). Incubation period seems an important factor influencing the MRT of biochar since it is a function of turnover rates and proportions of constituent C pools in a biochar (Singh et al, 2012;Zimmerman and Gao, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on biochar priming effects and its stability in soils

Fang

Singh

2015

Soil Biology and Biochemistry

192

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Biodegradability of organic matter in fire-affected mineral soils of Southern Spain

Cited by 74 publications

References 36 publications

For how long does the quality and quantity of residues in the soil affect the carbon compartments and CO2-C emissions?

For how long does the quality and quantity of residues in the soil affect the carbon compartments and CO2-C emissions?

Short-term changes in soil Munsell colour value, organic matter content and soil water repellency after a spring grassland fire in Lithuania

Effect of temperature on biochar priming effects and its stability in soils

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