Which 2:1 clay minerals are involved in the soil potassium reservoir? Insights from potassium addition or removal experiments on three temperate grassland soil clay assemblages

Barré, Pierre; Velde, B.; Fontaine, Colin; Catel, Nicole; Abbadie, Luc

doi:10.1016/j.geoderma.2008.05.022

Cited by 98 publications

(50 citation statements)

References 29 publications

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“…Among these different forms, dynamic equilibrium reactions control the release and/or fixation of K according to soil biogeochemical properties and processes (Zörb et al, 2014). Therefore, distribution of soil K forms is influenced by many agroenvironmental factors, such as soil parent materials (Askegaard et al, 2004;McLean and Watson, 1985;Öborn et al, 2005), degree of soil weathering (Andrist-Rangel et al, 2006;Barré et al, 2008;Johnston and Goulding, 1990), topography (Kozar et al, 2002;Winzeler et al, 2008) and nutrient balance (Bertsch and Thomas, 1985;Simonsson Geoderma 290 (2017) , 2007). Despite the natural abundance of K in soils (Askegaard et al, 2004;Schroeder, 1978), certain regions of the world, such as Australia, China and Iran, present crop K deficiencies over large areas due to particular pedoclimatic conditions or long-term underfertilization of K (Brennan and Bell, 2013;Hseung, 1980;Ji-yun, 1997;Malakouti, 1999;Römheld and Kirkby, 2010).…”

Section: Introductionmentioning

confidence: 99%

Spatial variability of potassium in agricultural soils of the canton of Fribourg, Switzerland

Blanchet

Libohova²,

Joost

et al. 2017

Geoderma

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Section: Introductionmentioning

confidence: 99%

Spatial variability of potassium in agricultural soils of the canton of Fribourg, Switzerland

Blanchet

Libohova²,

Joost

et al. 2017

Geoderma

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“…Reported pH values for surface soils in unfertilized subplots range from 5.0 to 5.5 [40,67], at the upper end of the 2-5 pH range frequently reported as typical for clay mineral aluminization [57,63,68,69]. Furthermore, despite 60 years of continuous cropping , XRD profile modelling shows no specific plant-related effects, such as the transformation of illite-like layers due to potassium uptake by plants [13,18,19,70,71], in the clay subfractions. While variations in peak position and profile in XRD data for the current study were observed, these variations did not translate quantitatively using the full-profile modelling method (Figure 8).…”

Section: Evolution Of Clay Mineralogy Over Timementioning

confidence: 99%

Soil Development under Continuous Agriculture at the Morrow Plots Experimental Fields from X-ray Diffraction Profile Modelling

et al. 2018

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Impact of continuous cropping on clay mineralogy was assessed on a collection of unfertilized soil samples from the Morrow Plots experimental fields covering 110 years of long crop rotations. Evolution of mineralogy was quantitatively determined by fitting X-ray diffraction (XRD) patterns from four size fractions (50-2, 2-0.2, 0.2-0.05 and <0.05 µm) of the surface horizon (0-20 cm). The mineralogy of the three clay subfractions (2-0.2 µm, 0.2-0.05 µm and <0.05 µm) consists mainly of coexisting illite-smectite-chlorite whose compositions range from discrete illite (in the 2-0.2 µm subfraction) to discrete smectite (in the <0.05 µm subfraction). Mixed layers of similar compositions were used to fit XRD data from all clay subfractions. With decreasing size fractions, both the size of the coherent scattering domains and the proportion of illite-rich mixed layers decrease, thus accounting for the higher cation exchange measured in the <0.05 µm subfraction compared to other clay subfractions. The analysis of fine clay subfractions (<0.2 µm or lower) provided key information and constraints to a complete and accurate description of the bulk <2 µm fraction. Additional constraints derived from chemical treatments (K-saturation and heating) proved to be especially useful to propose a reliable structure model for these fine clay subfractions because of their weakly modulated diffraction signature. Mineralogy of all subfractions considered is essentially stable over the studied period , with the relative proportion of the different clay layer types (illite, smectite, kaolinite, chlorite) showing no significant evolution in the bulk <2 µm fraction. A century of continuous cropping thus results essentially in an increase of fine clay particles (<0.05 µm) and a decrease of the 0.2-0.05 µm subfraction, indicative of clay mineral dissolution and consistent with observed increase of cation exchange capacity with time. The relative proportion of the bulk <2 µm fraction is nearly constant over the studied period, indicative of minimal export of clay phases.

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“…Even if the three soils received the same high K input (206.94 g), and this amount was much higher than total K leaf biomass + must extraction (0.12 + 0.56 g), the higher exchangeable K content, higher CEC and the predominance of 2:1 clay minerals as illites may explain the higher K concentration in the must. The ability to fix or release K from 2:1 clay minerals led to authors such as Barré et al (2008) to postulate that they behave as a K reservoir in soils. Esteban et al (1999) asserted that the K concentration in must mainly comes from root absorption, which is determined by the level of assimilable K in the soil.…”

Section: Karimmentioning

confidence: 99%

Grapevine nutritional status and K concentration of must under future expected climatic conditions texturally different soils

Leibar

Pascual

Aizpurua

et al. 2017

J. Soil Sci. Plant Nutr.

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Nutrition is a relevant issue for winegrowers because it influences grapevine growth, berry composition, as well as must and wine quality. In this research, the following impacts on the nutritional status of cv. Tempranillo grapevines were evaluated: simulated 2100 expected CO 2 , temperature (T) and relative humidity (RH) conditions (FCC; 700 µmol CO 2 /mol air, 28/18°C day/night and 33/53% RH, day/night) vs. current CO 2 , T and RH conditions (Curr; 390 µmol CO 2 /mol air, 24/14°C and 45/65% RH); well-watered (WW) vs. future expected water deficit (WD); and three texturally different soils with different clay contents (41, 19 and 8%). FCC resulted in reduced concentrations in leaf blades of N and Ca at veraison and N and Zn at full maturity. WD resulted in higher leaf blade Na and Mn concentrations at veraison and maturity, respectively compared to WW. However, K concentrations in the leaves and must were higher for WW than WD. Higher concentrations of Ca and Mn were found in leaf blades of grapevines sampled at full maturity from more clayey soils. Even when nutrient inputs exceeded plant extractions, high soil clay content increased the K concentration in must and consequently, could affect wine quality in terms of acidity loss. However, future expected water stress will have the opposite effect, reducing the berry K uptake under high soil clay (41%) conditions.

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Which 2:1 clay minerals are involved in the soil potassium reservoir? Insights from potassium addition or removal experiments on three temperate grassland soil clay assemblages

Cited by 98 publications

References 29 publications

Spatial variability of potassium in agricultural soils of the canton of Fribourg, Switzerland

Spatial variability of potassium in agricultural soils of the canton of Fribourg, Switzerland

Soil Development under Continuous Agriculture at the Morrow Plots Experimental Fields from X-ray Diffraction Profile Modelling

Grapevine nutritional status and K concentration of must under future expected climatic conditions texturally different soils

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