Geochemical aspects of aluminium in forest soils in Galicia (N.W. Spain)

Álvarez‐Rodríguez, Esperanza; Martínez, Ana Díaz; Calvo, R.

doi:10.1007/bf00002817

Cited by 44 publications

(24 citation statements)

References 17 publications

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“…Although mineral weathering may have been an important source of Al to the organic horizon, Al concentrations in O horizon leachates were largely undersaturated with respect to common Al hydroxide minerals. This phenomenon has been commonly observed in other studies of organic-rich systems (Cronan 1978;Nilsson & Bergkvist 1983;Dricsoll et al 1985;Cronan et al 1986;Alvarez et al 1992) and can be attributed to two factors: Al hydroxide minerals, such as gibbsite, are unstable in the forest floor micro-environment and the dominant processes controlling Al chemistry are f:…”

Section: Biogeochemical Controls On Solution Aluminum In the 0 Horizonmentioning

confidence: 85%

“…Although the mobilization of Al is generally associated with the acid hydrolysis of Al hydroxides and Al silicates in upper mineral horizons (Johnson et al 1981;Dahlgren et al 1989;Reuss et al 1990), studies have shown that significant amounts of Al are mobilized in and transported from surface organic horizons (Cronan 1980;David & Driscoll 1984;Driscoll et al 1985;Turner et al 1985;Bergkvist 1987;Cronan et al 1990;Walker et al 1990;Alvarez et al 1992;Miller et al 1992). However, as no detailed element budget of Al in the O horizon has been reported, the major sources of this soluble Al have not been identified.…”

Section: Introductionmentioning

confidence: 93%

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Biogeochemical controls on aluminum chemistry in the O horizon of a red spruce (Picea rubens Sarg.) stand in central Maine, USA

Rustad

Cronan

1995

Biogeochemistry

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Abstract. This study examined the biotic and abiotic processes controlling solution chemistry and cycling of aluminum (Al) in the organic horizons of a northern coniferous forest ecosystem. A mass balance budget indicated that aboveground inputs of Al to the 0 horizon averaged 0.9 kg ha -l yr -, with major inputs accounted for by litterfall (69%), followed by precipitation (21%), and net canopy throughfall plus stemflow (10%). Estimated leaching losses of Al from the O horizon averaged 2.1 kg Al ha -' yr -l . We hypothesize that the difference between measured Al inputs and outputs can be accounted for by Al release from weathering of soil minerals admixed into the O horizon. Variations in O horizon solution Al chemistry were influenced by a number of factors, including pH, Al equilibria with different solid-phase organic exchange sites, and Al complexation with humic ligands in soil solution.

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Section: Biogeochemical Controls On Solution Aluminum In the 0 Horizonmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 93%

Biogeochemical controls on aluminum chemistry in the O horizon of a red spruce (Picea rubens Sarg.) stand in central Maine, USA

Rustad

Cronan

1995

Biogeochemistry

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“…Dans chacune des unités topographiques du bassin versant d'Arcos, un inventaire des hauteurs totales et des diamètres à 1,3 m et à la souche a été réalisé sur des surfaces variant entre 900 (crête) et 2000 m 2 [29]. Les biomasses des peuplements sur pied ont été calculées en appliquant ces relations à l'inventaire des peuplements.…”

Section: Biomasseunclassified

“…En Galice, la comparaison des taux de saturation de 500 échantillons de sols prélevés sous différentes végéta-tions forestières ne montre pas de différences significatives [9]. Alvarez et al [2] comparent cependant la composition de la solution du sol (entre 5 et 35 cm de profondeur) dans des peuplements d'eucalyptus, de pins et de chênes adjacents et observent des concentrations moyennes en Ca et Mg plus faibles sous les plantations d'eucalyptus. Les teneurs les plus élevées en Al et en carbone organique dissous s'observent par contre sous les peuplements de chêne.…”

Section: Introductionunclassified

Bilans d'�l�ments min�raux dans de petits bassins versants forestiers de Galice (NW Espagne)

Dambrine¹,

Vega

Rodríguez³

et al. 2000

Ann. For. Sci.

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(Reçu le 15 février 1999 ; accepté le 3 mai 1999)Résumé -Afin d'estimer la pérennité de l'alimentation minérale de plantations forestières de Pinus pinaster et Eucalyptus globulus de forte productivité en Galice, nous avons calculé des bilans (entrées-sorties) d'éléments minéraux dans trois petits bassins versants. Dans chacun de ces trois bassins, les sorties par drainage de Ca, Mg et K sont inférieures aux entrées par les pluies. Cette particularité est attribuée à la relative pauvreté en cations alcalino-terreux des roches mères, au très faible drainage de sulfate et nitrate lié à l'absence de pollution atmosphérique, et surtout à la forte immobilisation forestière qui tire directement profit des apports par les pluies. L'exploitation forestière actuelle des peuplements de pins et d'eucalyptus conduit à des bilans fortement négatifs de Ca, Mg et K, mais qui diffèrent peu entre ces peuplements. La différence majeure provient du mode d'exploitation, selon que les arbres sont ou non écorcés en forêt, et que la litière est exportée. La libération par altération minérale d'un flux relativement important de Ca et K est nécessaire pour compenser ces pertes. Les estimations du flux d'altération conduisent à penser que ce flux est suffisant dans le bassin versant sur granodiorite. Dans les bassins versants sur granite, ce flux est vraisemblablement insuffisant en ce qui concerne le Ca, mais des mesures complémentaires sont nécessaires pour pouvoir l'affirmer. Les bilans d'azote montrent qu'une forte fixation symbiotique est indispensable pour assurer la pérennité de la production forestière. bassin versant / Eucalyptus globulus / Pinus pinaster / altération / GaliceAbstract -Budgets of mineral elements in small forested catchments in Galicia (NW Spain). In order to assess the sustainability of mineral supply to fast growing Eucalyptus globulus and Pinus pinaster stands in Galice (NW Spain), we calculated (input-output) nutrient budgets in three small catchments: the Castrove and Jabali catchments with eucalyptus on a base poor granite and the Arcos catchment with pine on granodiorite. In each catchment, the annual drainage output was lower than the rainwater input for Ca, Mg and K. This particularity is attributed to (a) the relative low content of Ca and Mg of the parent material, (b) the very low concentrations of NO 3 and SO 4 of drainage water in an area with very low level of atmospheric pollution, and (c) to the strong mineral uptake of fast growing stands. The present management of forests leads to negative budgets, both in the eucalyptus and pine catchments. But the traditional management of pine stands including the harvest of needles and branches was much more impoverishing than the present management of eucalyptus stands, where timber is the only harvested product. Various estimates of the weathering rate suggest that this flux is sufficient to compensate for the losses in the catchment on granodiorite but probably insufficient on granite. Since nitrogen deposition is extremely low, and forest fires are qui...

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“…Al is recognized as a potentially toxic element for all living organisms including human beings (Exley & Korchazhkina 2001). In the case of toxicity towards plants it has been shown, by laboratory bioassay, that Al-organic binding can reduce or diminish Al toxicity (Alvarez et al 1992). Moreover, organic acids play a key role in Al tolerance mechanisms.…”

mentioning

confidence: 99%

Study of interactions between relevant organic acids and aluminium in model solutions using HPLC and IC

Drábek¹,

Kiplagat²,

Komárek³

et al. 2015

Soil & Water Res.

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Drábek O., Kipkoech Kiplagat I., Komárek M., Tejnecký V., Borůvka L. (2015): Study of interactions between relevant organic acids and aluminium in model solutions using HPLC and IC. Soil & Water Res., 10: 172-180.The interactions of different organic acids such as citric, malic, oxalic, and fulvic with aluminium were studied using ion-exchange chromatography (IC) and high performance liquid chromatography (HPLC). The experiments were carried out at low pH (1.5-3.1). The results of IC experiments on the interaction between Al and oxalate, citrate, and malate were compared with model chemical equilibrium calculations. The strongest effect on Al speciation was observed with oxalic acid and fulvic acid. These two ligands formed more than one type of complex with Al. In contrast, there was no significant effect of malic acid on Al speciation and a rather weak effect caused by citric acid. The studies show that the formed complexes are stable even at low pH.

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Geochemical aspects of aluminium in forest soils in Galicia (N.W. Spain)

Cited by 44 publications

References 17 publications

Biogeochemical controls on aluminum chemistry in the O horizon of a red spruce (Picea rubens Sarg.) stand in central Maine, USA

Biogeochemical controls on aluminum chemistry in the O horizon of a red spruce (Picea rubens Sarg.) stand in central Maine, USA

Bilans d'�l�ments min�raux dans de petits bassins versants forestiers de Galice (NW Espagne)

Study of interactions between relevant organic acids and aluminium in model solutions using HPLC and IC

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