The Solubility of Aluminum in Soils

Lindsay, W. L.; Walthall, P. M.

doi:10.1201/9780138736781-8

Cited by 30 publications

(11 citation statements)

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“…Thus, the results suggest that P solubility in slightly acidic systems was controlled by solid phases of Al-P such as variscite (AlPO 4 •2H 2 O). The low solubility of variscite under acidic conditions and in the presence of high Al 3+ concentrations is well known [58,59], which could be one reason for the significantly lower porewater DRP concentration in alum-amended, compared to unamended and gypsum-amended treatments. Significant decreases in Olsen-P and CaCl 2 -extractable P with alum amendment has been previously documented, which was mainly attributed to the transformation of P from Ca 2 -P and Ca 8 -P to Al-P [60].…”

Section: P Transformations and Release At Early Stages Of Flooding In...mentioning

confidence: 99%

Alum and Gypsum Amendments Decrease Phosphorus Losses from Soil Monoliths to Overlying Floodwater under Simulated Snowmelt Flooding

Kumaragamage

Weerasekara

Perry

et al. 2022

Water

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Phosphorus (P) loss from soils poses a threat of eutrophication to downstream waterbodies. Alum (Al2(SO4)3·18H2O) and gypsum (CaSO4·2H2O) are effective in reducing P loss from soils; however, knowledge on their effectiveness under cold temperatures is limited. This study examined the reduction of P loss from soils with alum and gypsum amendment under simulated snowmelt flooding. Intact soil monoliths (15 cm depth) collected from eight agricultural fields in flood-prone areas of Manitoba, Canada, were surface amended with alum or gypsum, pre-incubated for 2 weeks, then flooded and incubated at 4 °C for 8 weeks. Porewater and floodwater samples collected weekly were analyzed for dissolved reactive P (DRP), dominant cations and anions. An enhanced P release with flooding time was observed in all soils whether amended or unamended; however, alum/gypsum amendment reduced DRP concentrations in porewater and floodwater in general, with alum showing a more consistent effect across soils. The reduction in floodwater DRP concentrations (maximum DRP concentration during flooding) with alum and gypsum ranged from 34–90% and 1–66%, respectively. Based on Visual MINTEQ thermodynamic model predictions, precipitation of P and formation of P-sorbing mineral species with alum and gypsum amendment reduced DRP concentrations at latter stages of flooding.

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Section: P Transformations and Release At Early Stages Of Flooding In...mentioning

confidence: 99%

Alum and Gypsum Amendments Decrease Phosphorus Losses from Soil Monoliths to Overlying Floodwater under Simulated Snowmelt Flooding

Kumaragamage

Weerasekara

Perry

et al. 2022

Water

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“…For each system, 15 solutions (S01 to S15) were prepared with an HA concentration equal to 120 mg L -1 and Si or Al concentrations varying from 0 to 10 -2 mol L -1 according to concentrations given in Table 1. This concentration range includes the concentrations range observed in most natural surface waters (soil solutions, rivers and lakes) for dissolved Si (Cornelis et al, 2011) and Al (Lindsay and Walthall, 2020). After component mixing, each solution was left to equilibrate for one week.…”

Section: Batch Systemsmentioning

confidence: 99%

Evidence of humic acid-aluminium‑silicon complexes under controlled conditions

Merdy

Meunier

Ziarelli

et al. 2022

Science of The Total Environment

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“…Acidification of arable soils has increased in China from 1980 to 2000 s [ 1 ]. Soil acidification significantly accelerates aluminum (Al) solubilization from minerals when the soil pH is less than 5.0 [ 2 ]. The excess Al in the soil disturbs the nutrient and water balance of the rhizosphere, thereby reducing crop yield [ 3 ], and represents one of the most limiting factors to crop production in tropical and subtropical regions [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

The aluminum distribution and translocation in two citrus species differing in aluminum tolerance

Zhang

Lin

et al. 2022

BMC Plant Biol

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Background Many citrus orchards of south China suffer from soil acidification, which induces aluminum (Al) toxicity. The Al-immobilization in vivo is crucial for Al detoxification. However, the distribution and translocation of excess Al in citrus species are not well understood. Results The seedlings of ‘Xuegan’ [Citrus sinensis (L.) Osbeck] and ‘Shatianyou’ [Citrus grandis (L.) Osbeck], that differ in Al tolerance, were hydroponically treated with a nutrient solution (Control) or supplemented by 1.0 mM Al3+ (Al toxicity) for 21 days after three months of pre-culture. The Al distribution at the tissue level of citrus species followed the order: lateral roots > primary roots > leaves > stems. The concentration of Al extracted from the cell wall (CW) of lateral roots was found to be about 8 to 10 times higher than in the lateral roots under Al toxicity, suggesting that the CW was the primary Al-binding site at the subcellular level. Furthermore, the Al distribution in CW components of the lateral roots showed that pectin had the highest affinity for binding Al. The relative expression level of genes directly relevant to Al transport indicated a dominant role of Cs6g03670.1 and Cg1g021320.1 in the Al distribution of two citrus species. Compared to C. grandis, C. sinensis had a significantly higher Al concentration on the CW of lateral roots, whereas remarkably lower Al levels in the leaves and stems. Furthermore, Al translocation revealed by the absorption kinetics of the CW demonstrated that C. sinensis had a higher Al retention and stronger Al affinity on the root CW than C. grandis. According to the FTIR (Fourier transform infrared spectroscopy) analysis, the Al distribution and translocation might be affected by a modification in the structure and components of the citrus lateral root CW. Conclusions A higher Al-retention, mainly attributable to pectin of the root CW, and a lower Al translocation efficiency from roots to shoots contributed to a higher Al tolerance of C. sinensis than C. grandis. The aluminum distribution and translocation of two citrus species differing in aluminum tolerance were associated with the transcriptional regulation of genes related to Al transport and the structural modification of root CW.

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The Solubility of Aluminum in Soils

Cited by 30 publications

References 0 publications

Alum and Gypsum Amendments Decrease Phosphorus Losses from Soil Monoliths to Overlying Floodwater under Simulated Snowmelt Flooding

Alum and Gypsum Amendments Decrease Phosphorus Losses from Soil Monoliths to Overlying Floodwater under Simulated Snowmelt Flooding

Evidence of humic acid-aluminium‑silicon complexes under controlled conditions

The aluminum distribution and translocation in two citrus species differing in aluminum tolerance

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