Soil pH controls the environmental availability of phosphorus: Experimental and mechanistic modelling approaches

Devau, Nicolas; Cadre, Edith Le; Hinsinger, Philippe; Jaillard, Benoît; Gérard, Frédéric

doi:10.1016/j.apgeochem.2009.09.020

Cited by 202 publications

(138 citation statements)

References 81 publications

Supporting

Mentioning

128

Contrasting

Unclassified

Order By: Relevance

“…One soil with pH \ 6 had a surprisingly low P level. Given no phosphate minerals were seen detected in these soils, data are consistent with documented phosphate sorption to and retention by iron oxides or clay minerals (Edzwald et al 1976;Geelhoed et al 1997;Neff et al 2006), characterised by P levels varying with pH (Devau et al 2009) and Ca (a proxy for soil carbonates) in an inverted U-shaped pattern as was observed here.…”

Section: Regional Geology and Soil Geochemistrysupporting

confidence: 65%

Soil geochemistry confines microbial abundances across an arctic landscape; implications for net carbon exchange with the atmosphere

et al. 2014

View full text Add to dashboard Cite

A large portion of the World's terrestrial organic carbon is stored in Arctic permafrost soils. However, due to permafrost warming and increased in situ microbial mineralisation of released carbon, greenhouse gas releases from Arctic soils are increasing, including methane (CH 4(g) ). To identify environmental controls on such releases, we characterised soil geochemistry and microbial community conditions in 13 near-surface Arctic soils collected across Kongsfjorden, Svalbard. Statistically significant correlations were found between proxies for carbonate mineral content (i.e. Ca and Mg) and soil pH (Spearman rho = 0.87, p \ 0.001). In turn, pH significantly inversely correlated with bacterial and Type I methanotroph gene abundances across the soils (r = -0.71, p = 0.01 and r = -0.74, p = 0.006, respectively), which also co-varied with soil phosphorous (P) level (r = 0.79, p = 0.01 and r = 0.63, p = 0.02, respectively). These results suggest that soil P supply, which is controlled by pH and other factors, significantly influences in situ microbial abundances in these Arctic soils. Overall, we conclude microbial responses to increasing 'old carbon' releases in this Arctic region are constrained by nutrient-deficiency in surface soils, with consequential impacts on the flux and composition of carbon gasses released to the atmosphere.

show abstract

Section: Regional Geology and Soil Geochemistrysupporting

confidence: 65%

Soil geochemistry confines microbial abundances across an arctic landscape; implications for net carbon exchange with the atmosphere

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Decreasing soil pH also increases the positive charge around Al and Fe oxides and thereby increases anion adsorption (Muljadi et al 1966;Bowden et al 1980). Oxalate extractable Al and Fe ox levels measured at these sites were in the upper range of the values found in the literature (Shanley 1992;Freese et al 1992;Devau et al 2009;Kanˇa et al 2011) and are higher than levels expected for geologically young/recently deglaciated soils (Peltovuori et al 2002), although they are still much lower than those found in highly weathered soils such as Ultisols (e.g., 3000Á8000 mmol Al g (1 ; 500Á5000 mmol Fe g (1 ; Shaw 2001). Although Al exg and Fe ox were higher at the lower pH CaCl 2 study soils, there was a negative relationship between labile [P] and B-horizon soil pH CaCl 2 across the study sites (Fig.…”

Section: Patterns In Stream Total Phosphorussupporting

confidence: 51%

Phosphorus forms and response to changes in pH in acid-sensitive soils on the Precambrian Shield

2015

View full text Add to dashboard Cite

Baker, S. R., Watmough, S. A. and Eimers, M. C. 2015. Phosphorus forms and response to changes in pH in acid-sensitive soils on the Precambrian Shield. Can. J. Soil Sci. 95: 95Á108. Soil acidification may explain declines in total phosphorus (TP) levels that have been observed in surface waters in central Ontario, Canada, but much of the research on phosphorus (P) mobility in pH manipulated soils has been performed at high P concentrations (i.e., !500 mM). This study investigated P fractionation in acidic (pH 54.6) soils in south-central Ontario and relationships between soil pH and P sorption at relatively low P concentrations to test whether long-term declines in soil pH could have increased soil P sorption. Soils from three forested catchments that vary naturally in soil pH and outlet stream [TP] (0.1Á0.4 mM in 2008) had very similar soil P concentrations and distributions (Hedley fractionation). Only hydrochloric-acid extractable P (i.e., apatite) differed amongst catchments and was greatest at the catchment with the highest stream [TP]. The fraction of P present as labile/ soluble P did not decline with pH as expected and experiments indicated that P sorption at P concentrations between 4.52 and 452.1 mM was insensitive to manipulated solution pH. Soils were, however, able to sorb!90% of P added in sorption experiments at [P] 5452.1 mM. These results suggest that acidification-induced P sorption in upland soils has not contributed to observed decreases in surface water TP concentrations.Key words: Phosphorus, acidification (soil), Hedley fractionation, sorption, Podzols, Ontario (central) Baker, S. R., Watmough, S. A. et Eimers, M. C. 2015. Types de phosphore et re´action de cet e´le´ment aux variations du pH dans les sols du bouclier pre´cambrien sensibles a`l'acidification. Can. J. Soil Sci. 95: 95Á108. L'acidification du sol pourrait expliquer la concentration de phosphore total (PT) plus faible observe´e dans les eaux superficielles du centre de l'Ontario, mais une bonne partie des recherches sur la mobilite´du phosphore (P) dans les sols dont le pH avait e´te´modifie´ont e´teé ffectue´es a`une concentration de P e´leve´e (a`savoir, supe´rieure a`500 mM). La pre´sente e´tude portait sur le fractionnement du P dans les sols acides (pH 54,6) du centre-sud de l'Ontario et sur les liens existant entre le pH du sol et la sorption du P aux concentrations de P relativement faibles. Elle devait e´tablir si l'acidification a`long terme du sol pouvait avoir accru la sorption du P dans le sol. Trois bassins hydrographiques forestiers dont le pH et la de´charge variaient naturellement [PT] (0,1Á0,4 mM en 2008) pre´sentaient une concentration et une distribution tre`s semblables du P dans leur sol (me´thode de fractionnement de Hedley). Seule la concentration de P extractible a`l'acide chlorhydrique (a`savoir, l'apatite) diffe´rait d'un bassin a`l'autre et atteignait un maximum dans le bassin a`la de´charge la plus importante [PT]. La fraction du P correspondant au P labile/soluble ne diminue pas avec le pH comme ...

show abstract

“…Due to the mineralogical and electrochemical properties of many soils, some essential mineral nutrients are unavailable to plants because they are present in insoluble forms [105]. Biofertilization consists of a direct mechanism that improves the macro or micronutrient acquisition (uptake and assimilation) by plants.…”

Section: Biofertilization Effectsmentioning

confidence: 99%

Plant growth promotion by streptomycetes: ecophysiology, mechanisms and applications

Sousa

Olivares

2016

Chem. Biol. Technol. Agric.

128

View full text Add to dashboard Cite

The genus Streptomyces comprises filamentous Gram-positive bacteria that are widely recognized for their ability to produce bioactive compounds such as antimicrobial, antiparasitic and immune-suppressing compounds via secondary metabolism. These bioactive compounds represent a third of all commercially available antibiotics. Streptomycetes have been found in beneficial associations with plants where they have improved plant growth and protected against pests, which have attracted the attention of researchers worldwide. This review focuses on the potential of streptomycetes as plant growth-promoting bacteria (PGPS) and considers features related to secondary metabolic pathways, interactions with host plants and recent advances in elucidating plant growth-promoting mechanisms. Such advances in basic knowledge have increased the prospects for streptomycetes to be used as bioinoculants for sustainable agriculture.

show abstract

Soil pH controls the environmental availability of phosphorus: Experimental and mechanistic modelling approaches

Cited by 202 publications

References 81 publications

Soil geochemistry confines microbial abundances across an arctic landscape; implications for net carbon exchange with the atmosphere

Soil geochemistry confines microbial abundances across an arctic landscape; implications for net carbon exchange with the atmosphere

Phosphorus forms and response to changes in pH in acid-sensitive soils on the Precambrian Shield

Plant growth promotion by streptomycetes: ecophysiology, mechanisms and applications

Contact Info

Product

Resources

About