Change and spatial variability of soil organic matter humification after long-term tillage and olive mill wastewater application in arid regions

Gargouri, Kamel; Mbadra, Chaker; Chaker, Rayda; Souidi, Yousra; Abbas, Ouissam; Baeten, Vincent; Rigane, Hafedh

doi:10.1071/sr19113

Cited by 10 publications

(6 citation statements)

References 52 publications

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“…In the deep layer, pH values varied between 8.74 and 9.19 in OC-CL and between 9.10 and 9.19 in OC-AR. These results were similar to those found by [61] in Sfax Tunisia in conventional tillage (cultivated soil) with alkaline pH (9.17 ± 0.76); since the SOC degradation and the CaCO 3 solubilization may affect pH, in this line, we suggest that the alkaline condition can be caused by the high concentration of the calcium carbonate.…”

Section: Soil Bulk Density and Ph In Ar And CLsupporting

confidence: 91%

Short and Long-Term Effect of Land Use and Management on Soil Organic Carbon Stock in Semi-Desert Areas of North Africa-Tunisia

et al. 2021

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Soil organic carbon (SOC) plays an important role in the global C cycle, as well as in the maintenance and improvement of the soil quality. Over time, special attention has been paid to it in the study of the SOC reserves worldwide; however, reduced attention has been given to assessing the spatial patterns of SOC stock (SOCS) in semi-desert ecosystems. In this line, there are no conclusive studies in drylands of Africa affected by aeolian processes (semi-desert conditions) mainly due to the complexity of sample collection, and this is especially significant in some soil types such as Arenosols (AR) and Calcisols (CL). This study evaluated the spatial variability of SOC and SOCS in AR and CL with woody crops in relation to land use and management (old plantations > 100 years: centenary olive grove; new plantations < 12 years: young olive grove, almond, and pistachio) in semi-desert conditions. For this purpose, 16 soil profiles (for 0–40 and 40–100 cm depth) were selected and studied in an experimental area of Menzel Chaker-Sfax in southeastern Tunisia (North Africa). The main results indicated that the SOCS on average was higher in Old Cultivated AR (OC-AR) with 41.16 Mg ha−1 compared to Newly Cultivated AR (NC-AR) with 25.13 Mg ha−1. However, the SOCS decreased after a long period of cultivation in CL from 43.00 Mg ha−1 (Newly Cultivated CL: NC-CL) to 32.19 Mg ha−1 (Old Cultivated CL: OC-CL). This indicates that in the long term, CL has more capacity to store SOC than AR, and that in the short term, AR is more sensitive to land management than CL.

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Section: Soil Bulk Density and Ph In Ar And CLsupporting

confidence: 91%

Short and Long-Term Effect of Land Use and Management on Soil Organic Carbon Stock in Semi-Desert Areas of North Africa-Tunisia

et al. 2021

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“…The E4/E6 ratio is related to the condensation degree of the aromaticity or aliphaticity and the molecular weight of organic compounds [39,42,43]. Higher E4/E6 ratios (Boa Vista neighbourhood) are generally associated with more aliphatic and low-molecular-weight structures [44], with branched and straight-chain carbons [45,46]. The greater presence of vegetation with aliphatic groups (less humified) in Boa Vista could also be observed in the greater reflectance at 725-720 nm (red region) (Figure 3b), typical of long aliphatic chains with C-C and C-H bonds [45].…”

Section: Resultsmentioning

confidence: 99%

Soil Colour and Plant-Wax Markers: Application in Forensic Investigations under Urban Subtropical Environments

et al. 2022

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Most cases involving soil in criminal investigations in Brazil have focused on the chemical and mineralogical analyses of soil fractions without including the organic matter. The organic fraction contains plant-wax markers which may be useful to “fingerprint” forensic soils due to their chemical diversity, relative longevity and resistant nature. The aim of this study was to test the long- (kilometre), medium- (metre) and short- (centimetre) scale variability of plant-wax biomarkers in a forensic context in anthropised urban soils and soils developed under subtropical conditions. Two areas from the Curitiba municipality and two areas from the Colombo municipality, Paraná State, South Brazil, were selected. Soil colour analysis was carried out to obtain reflectance data over the 360–740 nm wavelength range. Furthermore, plant-wax marker compounds (n-alkanes and fatty-alcohols) were assessed by extraction and separation into different classes and an analysis of the compounds by gas chromatography (GC/MS). The compositions of the wax-marker profiles were different in samples collected side-by-side, showing sensitivity to local variations under subtropical conditions and in areas under intense human urban disturbance. Under these conditions, biomarkers may be used in real crime scenes, even on a micrometric scale of variation.

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“…Furthermore, some studies have addressed the impact of individual agricultural practices on soil organic matter composition of soils in the Mediterranean region, e.g. tillage (Laudicina et al, 2014;Alvaro-Fuentes et al, 2008;Blanco Moure et al, 2016) (Brunetti et al, 2005;Perez Lomas et al, 2010;Aranda et al, 2015;Mbarek et al, 2020), crop rotation (Angeletti et al, 2021) and cover crops (Peregrina et al, 2012;Vicente-Vicente et al, 2015).…”

Section: Soils Of the Mediterranean Region Are Particularlymentioning

confidence: 99%

“…Absorption of humic substances on the wavelength of 465 nm is equal to the absorption of components linked to initial phases of humification (fulvic acid) and absorption of light on 665 nm refers to well-humified components (humic acid), Stevenson (1982). The optical index E 4 / E 6 calculated as a ratio of the absorbances at 465 and 665 nm has been widely used to study humic substances (Szajdak et al, 2007;Aranda et al, 2011;Bensa et al, 2016;Vicente-Vicente et al, 2015;Mbarek et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Humus quality in Terrra rossa soils under olive groves with different soil management types

BENSA,

HULJEV,

JURKOVIĆ BALOG

2023

JCEA

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The paper aimed to determine humus quality in Terra rossa soils under olive groves with different soil management types. A total of 10 top-soil samples (0-20 cm) were collected in olive groves of Middle Dalmatia, Croatia, out of which 5 were from the traditional low-input olive groves (TOG) and 5 in the intensive olive groves (IOG). The soil samples were analyzed for basic soil properties, soil organic carbon (SOC), and fractional composition of humic substances. Spectroscopic characterization of humic substances was carried out by measuring absorbance in the VIS spectral range (400-700 nm). Optical index E 4 /E 6 (ratio of optical absorbance at 465 to 665 nm for humic substances in solution) was calculated. The mean value of SOC in soils under TOG (3.06%) was lower than in soils under IOG (3.88%). Higher variations of carbon in humic (C HA ) and fulvic acid (C FA ) were observed in the soils under IOG. The mean C HA /C FA ratio in soils under TOG was higher than in soils of IOG (1.78 and 1.26, respectively). The soils under TOG had fulvic-humic to humic types, while the soils of IOG had humic-fulvic to humic types of humus. A lower mean E 4 /E 6 index of soils under TOG than IOG (3.78 and 4.36, respectively) confirmed the results of the classical analytical method. Our findings reveal higher variation and lower humus quality in soils under intensive olive cultivation.

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Change and spatial variability of soil organic matter humification after long-term tillage and olive mill wastewater application in arid regions

Cited by 10 publications

References 52 publications

Short and Long-Term Effect of Land Use and Management on Soil Organic Carbon Stock in Semi-Desert Areas of North Africa-Tunisia

Short and Long-Term Effect of Land Use and Management on Soil Organic Carbon Stock in Semi-Desert Areas of North Africa-Tunisia

Soil Colour and Plant-Wax Markers: Application in Forensic Investigations under Urban Subtropical Environments

Humus quality in Terrra rossa soils under olive groves with different soil management types

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