Evaluation of different clay minerals as additives for soil water repellency alleviation

Lichner, Ľubomír; Dlapa, Pavel; Doerr, Stefan H.; Mataix-Solera, Jorge

doi:10.1016/j.clay.2005.10.012

Cited by 64 publications

(49 citation statements)

References 23 publications

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“…Previous studies dealing with the impact of various clay minerals added to water repellent soils showed that kaolinite clay minerals usually reduced soil water repellency (Lichner et al, 2006;McKissock et al, 2000), while smectite clays also reduced soil repellency but to a lesser extent (McKissock et al, 2002). Illite is reported to increase the water repellency (Lichner et al, 2006).…”

Section: Results and Discussion Characteristics Of Clay In Aggregate mentioning

confidence: 99%

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Droplet infiltration dynamics and soil wettability related to soil organic matter of soil aggregate coatings and interiors

Fér

Leue

Kodešová

et al. 2016

Journal of Hydrology and Hydromechanics

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Abstract:The organo-mineral coatings of soil aggregates, cracks, and biopores control sorption and macropore-matrix exchange during preferential flow, in particular in the clay-illuvial Bt-horizon of Luvisols. The soil organic matter (SOM) composition has been hypothesized to explain temporal changes in the hydraulic properties of aggregate surfaces. The objective of this research was to find relations between the temporal change in wettability, in terms of droplet infiltration dynamics, and the SOM composition of coated and uncoated aggregate surfaces. We used 20 to 40 mm sized soil aggregates from the Bt2 horizon of a Haplic Luvisol from loess that were (i) coated, (ii) not coated (both intact), and (iii) aggregates from which coatings were removed (cut). The SOM composition of the aggregate surfaces was characterized by infrared spectroscopy in the diffuse reflection mode (DRIFT). A potential wettability index (PWI) was calculated from the ratio of hydrophobic and hydrophilic functional groups in SOM. The water drop penetration times (WDPT) and contact angles (CA) during droplet infiltration experiments were determined on dry and moist aggregate samples of the three types. The decrease in the CA with time was described using the power function (CA(t) = at -b ). For dry aggregates, the WDPT values were larger for coated as compared to uncoated regions on the aggregate surfaces, and increased with increasing PWI value (R 2 = 0.75). The a parameter was significantly related to the WDPT (R 2 = 0.84) and to the PWI (R 2 = 0.64). The relations between the b parameter and the WDPT (R 2 = 0.61) and the PWI (R 2 = 0.53) were also significant. The WDPT values of wet soil aggregates were higher than those of dry aggregates due to high water contents, which limited the droplet infiltration potential. At the wet aggregate surfaces, the WDPT values increased with the PWI of the SOM (R 2 = 0.64). In contrast to dry samples, no significant relationships were found between parameters a or b of CA(t) and WDPT or PWI for wet aggregate surfaces. The results suggest that the effect of the SOM composition of coatings on surface wettability decreases with increasing soil moisture. In addition to the dominant impact of SOM, the wettability of aggregate surfaces could be affected by different mineralogical compositions of clay in coatings and interiors of aggregates. Particularly, wettability of coatings could be decreased by illite which was the dominant clay type in coatings. However, the influence of different clay mineral fractions on surface wettability was not due to small number of measurements (2 and 1 samples from coatings and interiors, respectively) quantified.

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Section: Results and Discussion Characteristics Of Clay In Aggregate mentioning

confidence: 99%

“…Illite is reported to increase the water repellency (Lichner et al, 2006). Thus, different clay mineralogy of the studied aggregate interiors and their coatings could also have an impact on different aggregate surface wettability, i.e.…”

Section: Results and Discussion Characteristics Of Clay In Aggregate mentioning

confidence: 99%

Droplet infiltration dynamics and soil wettability related to soil organic matter of soil aggregate coatings and interiors

Fér

Leue

Kodešová

et al. 2016

Journal of Hydrology and Hydromechanics

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“…Kaolinite has been used successfully to ameliorate water repellency Blackwell, 1993;Ward & Oades, 1993;McKissock et al, 2000McKissock et al, , 2002Lichner et al, 2006), but large amounts (100 t/ha) are required (Blackwell, 1993) and therefore this strategy is only economic if clay occurs on site. Wetting agents (surfactants) are effective in increasing water infiltration, but they are costly and their use is limited largely to turf grass (Wallis & Horne, 1992), although increases in barley and lupin yields have been achieved in broadacre cropping systems when wetting agents have been applied as a band in furrows above the seed (Blackwell pers.…”

Section: Introductionmentioning

confidence: 99%

Potential for remediation of water repellent soils by inoculation with wax-degrading bacteria in south-western Australia

Roper

2006

Biologia

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Water repellency resulting from waxy coatings around soil particles causes significant crop and pasture losses. Bioremediation of these soils using inoculation of wax-degrading bacteria was investigated under field conditions. In a small scale experiment without any additional nutrients or soil conditioners, 2 inoculants (Rhodococcus sp. and Roseomonas sp.) out of 7 resulted in significant improvements in water infiltration. A larger scale experiment had compost and fertiliser applied to support inoculants in nutrient-poor sands and lime was added to half the treatments. There were 6 different inoculants and their mixtures. One inoculant (Mycobacterium sp.) significantly reduced water repellency on its own. However, the addition of lime produced a significant "inoculant by lime" interaction, and limed treatments with each of the 5 individual cultures of Rhodococcus spp. and a mixture containing the 5 cultures of Rhodococcus spp. and 1 culture of Mycobacterium sp. all resulted in significant reductions in water repellency when compared with their non-limed counterparts and controls. Lime alone (1 t/ha, 70% neutralising value) produced a small but significant benefit compared with the non-limed control. The results indicate that there is potential to increase soil wettability through increased activity by wax-degrading bacteria.

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“…It can be alleviated by cultural practices such as core aeration followed by sand topdressing and the application of a wetting agent (MITRA et al 2006), claying with kaolinite clays (MCKIS-SOCK et al 2002;LICHNER et al 2006), liming (to enhance pH), and inoculation with wax-degrading bacteria Rhodococcus sp. and Roseomonas sp.…”

mentioning

confidence: 99%

The impact of vegetation on hydraulic conductivity of sandy soil

Lichner¹,

Orfánus²,

Nováková³

et al. 2007

Soil Water Res.

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The objective of this study was to assess the impact of vegetation on the hydraulic conductivity of sandy soil at the locality Mláky II at Sekule (southwest Slovakia). The measurements were taken on the surface of a meadow (Meadow site), a 30-year old Scots pine (Pinus sylvestris) forest (Forest site) and a glade (Glade site). In the glade, the measurements were also taken in the depth of 50 cm (Pure sand) to reduce the influence of vegetation on the soil properties. It was found that the unsaturated hydraulic conductivity kr(−2 cm) as reduced due to the soil water repellency increased in the same order: Forest soil < Glade soil ≈ Meadow soil < Pure sand, similarly as decreased the water drop penetration time tp: Forest soil > Glade soil ≈ Meadow soil > Pure sand, which could refer to an inverse proportionality between the capillary suction and hydrophobic coating of the soil particles. The saturated hydraulic conductivity Ks increased in the following order: Meadow soil < Glade soil ≈ Forest soil < Pure sand; more than two-times higher Ks at both the Forest and Glade sites than that at the Meadow site could be the result of both the patchy growth of vegetation with some areas of bare soil at the Glade site and the macropores (dead roots) in more homogeneous humic top-layer at the Forest site. The share Br of flux through the pores with radii r longer than approximately 0.5 mm decreased in the order: Forest soil » Meadow soil > Glade soil » Pure sand, revealing the prevalence of preferential flow through macropores (dead roots) in the Forest site and a negligible share of macropores in the Pure sand.

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Evaluation of different clay minerals as additives for soil water repellency alleviation

Cited by 64 publications

References 23 publications

Droplet infiltration dynamics and soil wettability related to soil organic matter of soil aggregate coatings and interiors

Droplet infiltration dynamics and soil wettability related to soil organic matter of soil aggregate coatings and interiors

Potential for remediation of water repellent soils by inoculation with wax-degrading bacteria in south-western Australia

The impact of vegetation on hydraulic conductivity of sandy soil

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