Burning effects on the distribution of organic N compounds in a 15N labelled forest soil

Castro, A.; González-Prieto, S.J.; Carballas, T.

doi:10.1016/j.geoderma.2005.01.011

Cited by 21 publications

(28 citation statements)

References 39 publications

(60 reference statements)

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“…Wildfires modify quantitatively and qualitatively the soil C and N pools (Castro et al 2006;Certini et al 2011;Fernández et al 1997Fernández et al , 1999 that are the energy source for heterotrophs and the substrate for N transformations, respectively. Although weak relations have also been reported (Gómez-Rey et al 2012), the soil C and N pools are considered to be important controlling factors of gross N transformations (Booth et al 2005;Lang et al 2010;Magill and Aber 2000), with which they showed moderate to strong correlations in our plots.…”

Section: Discussionmentioning

confidence: 99%

“…Considering all samples and incubation intervals together, two thirds of in variance was explained by a model with the initial NO 3 Introduction Fires, either natural or anthropic, can strongly impact the biogeochemical cycles of nutrients; their effects are especially important for N which, besides being the major growthlimiting element since the evolution of higher plants (Ericsson 1995), is also the nutrient most prone to particulated and gaseous losses during the fires (Certini 2005;Fisher and Binkley 2000). Moreover, fires modify the dynamics of the soil N (a) by decreasing the most labile pools and increasing the most recalcitrant ones (Castro et al 2006;Prieto-Fernández et al 1993, 2004, partly by immobilising heterocyclic N into neoformed stable polyaromatic compounds that persist in soils (Francioso et al 2011;Knicker 2007;Mastrolonardo et al 2014), and (b) by affecting the N transformations that, as microbially mediated processes, are modified through changes in enzymatic activities and in biomass and composition of soil microbiota (Barreiro et al 2010;Díaz-Raviña et al 2012).…”

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confidence: 99%

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Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Gómez-Rey

González-Prieto

2015

Biol Fertil Soils

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Effects of fire and post-fire mulching for soil protection on N transformations were evaluated in the laboratory 4, 8 and 12 months after a wildfire in the 0-2-cm layer of a burned soil without (BS) or with straw mulch (BSM) and an unburned soil (US). The relationships between the gross N rates calculated with the FLUAZ model (Mary et al. 1998) and 19 soil characteristics were also explored. The gross N mineralisation (m) and NH 4 + immobilisation rates (ia) were similar and significantly correlated (p<0.001) and decreased during the incubation. Both m and ia were higher in burned than in unburned soils and, despite a reduction with time, differences were still 3-fold at t=12 months. Treatment explained half the variation of gross nitrification (kn), which was always low in US and nil in burned soils. Nitrate immobilisation (in) was the only gross rate that was (a) higher in unburned than in burned soils, (b) higher after 12 months than in previous samplings and (c) negatively affected by mulching. Both m and ia were positively correlated with soil pH, initial inorganic-N pools and extractable-Mn (p<0.05 to p<0.001) and negatively correlated with soil water-holding capacity and contents of total C, total N, extractable Cu and extractable Zn (p<0.05 to p<0.001). Both kn and in were negatively correlated with soil characteristics. Despite the strong correlations of pH and total C and N with the gross N transformations, the former variables were never included in the best multiple linear models for the latter. Besides the initial NH 4 + -N or NO 3 − -N contents, all but one best multiple regressions for m and ia included one or two available nutrients, in particular Cu, K, P and Mn. Multiple regressions of kn were only found for US and they included two nutrients (Ca and K, or K, Zn and electrical conductivity). Considering all samples and incubation intervals together, two thirds of in variance was explained by a model with the initial NO 3 − -N, the available Cu and P content. Mulching of burned soil gave a shortlived stimulation of m and ia and a sustained reduction of in.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Gómez-Rey

González-Prieto

2015

Biol Fertil Soils

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“…Charring often results in only small changes (Czimczik et al, 2003;Knicker et al, 2005a) or a decrease (Baldock and Smernik, 2002;Harden et al, 2004;Neff et al, 2005) in the C/N ratio, and an increase in more recalcitrant organic N forms (González-Pérez et al, 2004;Castro et al, 2006). In SOM unaffected by fire, 15 N NMR indicates that amide is the predominant form of soil N, whereas an increase of pyrroletype N is found in fire-affected soils, and has been suggested as a molecular marker of fire (Knicker et al, 2005a).…”

Section: How Fire Affects Soil Properties and Developmentmentioning

confidence: 99%

Black (pyrogenic) carbon: a synthesis of current knowledge and uncertainties with special consideration of boreal regions

2006

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“…Fire significantly affects the availability of nutrients, especially nitrogen (N) Rau et al 2007). Over the long term, fire can lead to losses in total N through volatilisation and through transfer of organic N from labile to recalcitrant pools (Gonzalez-Perez et al 2004;Castro et al 2006). Also, fire can negatively impact microbial biomass and activity that, in turn, can slow the cycling of plant-available N (Choromansk and DeLuca 2002;Certini 2005;Guerrero et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Influence of a native legume on soil N and plant response following prescribed fire in sagebrush steppe

Goergen

Chambers

2009

Int. J. Wildland Fire

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Abstract. Woodland expansion affects grasslands and shrublands on a global scale. Prescribed fire is a potential restoration tool, but recovery depends on nutrient availability and species responses after burning. Fire often leads to longterm losses in total nitrogen, but presence of native legumes can influence recovery through addition of fixed nitrogen. We examined the effects of prescribed fire in the central Great Basin, Nevada, USA, on density, biomass and nutrient content of a native legume, Lupinus argenteus (Pursh), and the effects of Lupinus presence and prescribed fire on soil inorganic nitrogen and on neighboring plant functional groups. We examined three treatments -1 year post-burn, 3 years post-burn and unburned control in three replicate blocks. Extractable soil inorganic nitrogen was variable and, despite a tendency towards increased inorganic nitrogen 1 year post-burn, differences among treatments were not significant. Extractable soil inorganic nitrogen was higher in Lupinus presence regardless of time since fire. Lupinus density increased after fire mainly owing to increased seedling numbers 3 years post-burn. Fire did not affect Lupinus tissue N and P concentrations, but cover of perennial grasses and forbs was higher in Lupinus presence. The invasive annual grass Bromus tectorum had low abundance and was unaffected by treatments. Results indicate that Lupinus has the potential to influence succession through modification of the post-fire environment.

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Burning effects on the distribution of organic N compounds in a 15N labelled forest soil

Abstract: Nitrogen distribution was studied, by successive 1M (H1) and 3M HCl (H2) hydrolyses, on a natural soil before (NS) and after 15

Cited by 21 publications

References 39 publications

Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Soil gross N transformation rates after a wildfire and straw mulch application for burned soil emergency stabilisation

Black (pyrogenic) carbon: a synthesis of current knowledge and uncertainties with special consideration of boreal regions

Influence of a native legume on soil N and plant response following prescribed fire in sagebrush steppe

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