Soil phosphorus transformations under forest burning and laboratory heat treatments

Galang, Marco A.; Markewitz, Daniel; Morris, Lawrence A.

doi:10.1016/j.geoderma.2009.12.026

Cited by 52 publications

(34 citation statements)

References 39 publications

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“…Changes in soil organic and inorganic P fractions are related to fire characteristics (Galang et al 2010). Cerrado fires depend on the existence of fine fuel (leaves and branches up to 6 mm in diameter) .…”

Section: Effects Of Fire On Soil Pmentioning

confidence: 99%

“…In addition to combustion of aboveground organic matter, increases in soil temperature during the fire front can combust soil organic matter, thus reducing phosphorus in organic fractions (Saá et al 1994). As a whole, there is generally a transient increase in inorganic phosphorus availability after burning (Saá et al 1994;Giardina et al 2000) but the source of this P either as pyromineralized litter or soil organic P remains unclear (Galang et al 2010) as does the fate of the P either re-immobilized into living biomass, retained in soils, or leached in soil solution.…”

mentioning

confidence: 99%

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Phosphorus cycling in a small watershed in the Brazilian Cerrado: impacts of frequent burning

et al. 2010

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Plant productivity in many tropical savannas is phosphorus limited. The biogeochemical cycling of P in these ecosystems, however, has not been well quantified. In the present study, we characterized P stocks and fluxes in a well-preserved small watershed in the Brazilian Cerrado. As the Cerrado is also a firedominated ecosystem, we measured the P stocks and fluxes in a cerrado stricto sensu plot with complete exclusion of fire for 26 years (unburned plot) and then tested some predictions about the impacts of fire impacts on P cycling in an experimental plot that was burned three times since 1992 (burned plot). The unburned area is an ecosystem with large soil stocks of total P (1,151 kg ha -1 up to 50 cm depth), but the largest fraction is in an occluded form. Readily extractable P was found up to 3 m soil depth suggesting that deep soil is more important to the P cycle than has been recognized. The P stock in belowground biomass (0-800 cm) was 9.9 kg ha -1 . Decomposition of fine litter released 0.97 kg P ha -1 year -1 . Fluxes of P through bulk atmospheric deposition, throughfall and litter leachate were very low (0.008, 0.006 and 0.028 kg ha -1 year -1 , respectively) as was stream export (0.001 kg ha -1 year -1 ). Immobilization of P by microbes during the rainy season seems to be an important mechanism of P conservation in this ecosystem. Fire significantly increased P flux in litter leachate to 0.11 kg ha -1 year -1 , and added 1.2 kg ha -1 of P in ash deposition after fire. We found an increase of P concentration in soil solution at 100 cm depth (from 0.03 lg l -1 in unburned plot to 0.3 lg l -1 in the burned plot). In surface soils (0-10 cm) of the burned plot, fire decreased the concentrations of extractable organic-P fractions, but did not significantly increase inorganic-P fractions. The reduction of extractable soil organic P in the burned plot in topsoil and the increase of P in the soil solution at greater depths indicated a reduction of P availability and may increase P fixation in deep soils. Repeated fire events over the long term may result in significant net loss of available forms of phosphorus from this ecosystem.

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Section: Effects Of Fire On Soil Pmentioning

confidence: 99%

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confidence: 99%

Phosphorus cycling in a small watershed in the Brazilian Cerrado: impacts of frequent burning

et al. 2010

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“…This result indicates that vegetation burning in the SB system, responsible for the release of P contained in the aerial biomass of the vegetation and the litter (Giardina et al, 2000), resulted in an increase in inorganic phosphorus availability and, probably, also increased the chemisorption of nutrients to Al and Fe oxides (Galang et al, 2010). In our study, sampling was performed four years after the last burning in the area under the SB system, demonstrating the ephemeral effect of ash addition.…”

Section: Inorganic and Organic Moderately Labile Phosphorus (Pi-h + Amentioning

confidence: 50%

“…The biogeochemical cycle of P is modified during vegetation and litter burning, by converting the organic P into orthophosphate (Certini, 2005), which is easily reactive with soils. Several studies have shown a relationship between vegetation burning and availability and quantities of P forms in soils (Giardina et al, 2000;Galang et al, 2010;Oliveira et al, 2011;Resende et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Forms in Ultisol Submitted to Burning and Trituration of Vegetation in Eastern Amazon

Farias

Júnior

Ruivo

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The use of fire to prepare agricultural areas is a technique still used by small farmers in eastern Amazon. This type of management changes the dynamics of soil nutrients, especially phosphorus, which constitutes the most limiting nutrient for crop production in tropical soils. This study was carried out to evaluate changes in phosphorus forms in an Argissolo Amarelo Distrófico (Ultisol) submitted to burning and trituration of secondary forest in eastern Amazon. The evaluated systems were: slashand-burn of vegetation; slash-and-mulch of vegetation; and secondary vegetation. The labile, moderately labile, moderately recalcitrant, available and total phosphorus fractions were assessed at the soil depths of 0.00-0.05, 0.05-0.10 and 0.10-0.20 m. The results showed a predominance of soluble P in acid (moderately labile P) over other forms in all management systems. The management systems influence the content and distribution of the forms of P, where the slash-and-mulch system presented the prevalence of the labile fraction, and the slash-and-burn system contained less labile forms. The slashand-mulch system favored the accumulation of labile P and total organic P.

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“…Abebe (1981) also indicated that soil burning reduces the exchangeable aluminium so that phosphorus fixation is reduced. Galang et al (2010) found higher available phosphorus from a field after one week of prescribed burning. However, availability of phosphorus could be only for short time as other cations will come into solution due to soil burning and increase phosphorus fixation in turn.…”

Section: Soc Total Nitrogen and Available Phosphorusmentioning

confidence: 90%

Effects of ‘‘Guie’’ on Soil Organic Carbon and Other Soil Properties: A Traditional Soil Fertility Management Practice in the Central Highlands of Ethiopia

Amare¹,

Yitaferu²,

Hurni³

2013

JAS

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A traditional soil fertility management practice through soil burning, locally called ''guie'' is practiced in the central highlands of Ethiopia. The study was conducted to investigate the effect of ''guie'' on physico-chemical properties of the soil and its long term impact on soil organic carbon (SOC). Two sets of soil samples were collected from the field. The first set was from central part of the heaps of the burnt soil. The second set was from adjacent cultivated fields used with and without ''guie'' for many years. Collected samples were analysed following standard laboratory procedures. Complete soil burning showed a significant decrease in SOC, total nitrogen, cation exchange capacity (CEC), exchangeable calcium, magnesium, sodium, available iron and clay while it significantly increased available phosphorus, manganese and copper, exchangeable potassium and sand. A significant difference (p<0.001) in SOC was also obtained for the second sample set. The highest (7.14%) and the smallest (1.54%) mean SOC was obtained from cultivated land where ''guie'' integrated with fallowing and without ''guie'' and fallowing, respectively. This indicates that fallowing could help the soil to accumulate SOC and if it coupled with the partial soil burning practice, accumulation of stable organic carbon in the soil could be enhanced. Intensive cultivation exposes the soil for erosion accompanied by active mineralization of the organic matter. Thus, results of the present study have an implication that fallowing integrated with ''guie'' is more sustainable to reserve OC in the soil system than the continuous cultivation.

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Soil phosphorus transformations under forest burning and laboratory heat treatments

Cited by 52 publications

References 39 publications

Phosphorus cycling in a small watershed in the Brazilian Cerrado: impacts of frequent burning

Phosphorus cycling in a small watershed in the Brazilian Cerrado: impacts of frequent burning

Phosphorus Forms in Ultisol Submitted to Burning and Trituration of Vegetation in Eastern Amazon

Effects of ‘‘Guie’’ on Soil Organic Carbon and Other Soil Properties: A Traditional Soil Fertility Management Practice in the Central Highlands of Ethiopia

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