Sustainable management of coastal saline soils in the Saloum river Basin, Senegal

Fall, Aïdara C. A. Lamine

doi:10.4314/ijbcs.v11i4.39

Cited by 7 publications

(4 citation statements)

References 33 publications

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“…Rainfed rice cultivation has been traditionally carried out in the lowlands of the Casamance River basin (South Senegal). These areas are influenced by seawater salinity, with tidal flows as far as 100 km inland from the coastal line [43]. In one of the secondary valleys, the Santack Valley near Ziguinchor (Figure 1), Caritas Spain collaborated with Caritas Ziguinchor and funded a project to recover soil from growing rainfed rice.…”

Section: Research Area and Soil Samplingmentioning

confidence: 99%

Improving the Chemical Properties of Acid Sulphate Soils from the Casamance River Basin

Bautista,

Oliver,

Lidón

et al. 2023

Land

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The anoxic conditions produced after the reflooding of acid sulphate soil (ASS) can reduce sulphate and/or Fe(III) with a consequent rise in pH. This study aimed to compare the effect of different amendments on ASS remediation and to analyse the effect on soil pH and exchangeable aluminium. Two mid-term incubation experiments were carried out to analyse the effect of amendments and water management on ASS. Soil samples were taken in the Santak Valley from four agricultural plots. During the first experiment, each soil sample was subject to two water management systems (flooded and non-flooded) and three amendment types (rice straw, manure, and lime). During the second experiment, the flooded condition was performed with three organic amendments (rice straw, manure, and biochar). In the first experiment, the amendments with organic matter (rice straw, and manure) increased the pH more under the flooded conditions, and manure was effective in reducing exchangeable aluminium (Alex) to 45% in the control soil. In the second experiment, all the organic amendments reduced soluble Al, but whereas straw increased soluble Fe, biochar diminished it. The amendment addition increased the soil pH and reduced Alex. The Alex reduction was greater for the stabler organic amendments: manure and biochar.

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Section: Research Area and Soil Samplingmentioning

confidence: 99%

Improving the Chemical Properties of Acid Sulphate Soils from the Casamance River Basin

Bautista,

Oliver,

Lidón

et al. 2023

Land

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“…En effet, dans nos études précédentes, nous avons montré que l'amendement organique permet d'améliorer la capacité du sol à résister au stress salin (Sall et al, 2015) à travers une stimulation de l'activité biologique. D'autres auteurs ont montré que l'ajout de résidus organiques permet de réduire le pourcentage de sodium échangeable (ESP) et la conductivité électrique (CE) et d'augmenter la capacité de rétention d'eau et la stabilité globale (Qadir et al, 2001 ;Fall, 2017).…”

Section: Introductionunclassified

Effets comparatifs du biochar, du phosphogypse et des résidus de baobab (Adansonia digitata) sur les activités microbiennes des sols salés de la cuvette rizicole Thiagar dans la Vallée du Fleuve Sénégal

Sall¹,

Diop²,

Fall³

et al. 2023

Int. J. Bio. Chem. Sci

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La restauration des sols salés des cuvettes rizicoles de la Vallée du Fleuve Sénégal est un défi majeur l’autosuffisance en riz du pays. L’objectif de cette étude était d’évaluer par la méthode du Krigeage la distribution spatiale de la salinité dans la cuvette de Thiagar, zone à forte production rizicole, et de comparer le potentiel des amendements de biochar, du phosphogypse et de résidus de baobab (Adansonia digitata) à régénérer les activités biologiques des sols. Les cartes élaborées font apparaître une cuvette divisée en deux zones différentes selon les propriétés chimiques et biologiques des sols. Une zone qui renferme les sols avec des ESP, des activités enzymatiques FDA, des CEC et des teneurs en C les plus élevés. Et, une zone qui renferme les sols avec des CE et des pH les plus élevés et des ESP les plus faibles. Les sols étudiés ne sont pas sodiques. Les résidus de baobab, riches en N et en Ca ont induit des activités microbiennes significativement plus élevées dans les sols amendés comparés au biochar et au phosphogypse. Cette étude suggère l’orientation de la recherche vers les résidus de Adansonia digitata riches en calcium pour favoriser la résilience des sols les plus salés. The restoration of saline soils in the rice-growing basins of the Senegal River Valley is a major challenge to the country's rice self-sufficiency. The aim of this study was to evaluate the spatial distribution of salinity in the Thiagar basin, an area of high rice production, using the Kriging method, and to compare the potential of biochar, phosphogypsum and baobab (Adansonia digitata) residues to regenerate soil biological activities. The maps developed showed two different zones according to the chemical and biological properties of the soils. The first zone contains the soils with the highest ESP, FDA enzymatic activity, CEC and C content. The second zone contains the soils with the highest EC and pH and the lowest ESP. The soils studied are not sodic. The residues of Baobab, rich in N and Ca induced significantly higher microbial activities in the amended soils compared to biochar and gypsum. This suggests that organic residues rich in calcium such as Adansonia digitata, may be a promising means of alleviating the effects of salinization

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“…To maintain the low salinity level achieved by infiltration of meltwater from saline ice, mulching (M) has been introduced and proven to be an efficient way to control the salinity in the root zone ( Guo and Liu, 2015 ). Mulching could reduce soil-water evaporation and thereby prevent soluble salt from moving up with water flow and accumulating in the topsoil ( Sadegh-Zadeh et al, 2009 ; Fall, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Long-Term Amelioration Practices Reshape the Soil Microbiome in a Coastal Saline Soil and Alter the Richness and Vertical Distribution Differently Among Bacterial, Archaeal, and Fungal Communities

et al. 2022

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Globally soil salinity is one of the most devastating environmental stresses affecting agricultural systems and causes huge economic losses each year. High soil salinity causes osmotic stress, nutritional imbalance and ion toxicity to plants and severely affects crop productivity in farming systems. Freezing saline water irrigation and plastic mulching techniques were successfully developed in our previous study to desalinize costal saline soil. Understanding how microbial communities respond during saline soil amelioration is crucial, given the key roles soil microbes play in ecosystem succession. In the present study, the community composition, diversity, assembly and potential ecological functions of archaea, bacteria and fungi in coastal saline soil under amelioration practices of freezing saline water irrigation, plastic mulching and the combination of freezing saline water irrigation and plastic mulching were assessed through high-throughput sequencing. These amelioration practices decreased archaeal and increased bacterial richness while leaving fungal richness little changed in the surface soil. Functional prediction revealed that the amelioration practices, especially winter irrigation with saline water and film mulched in spring, promoted a community harboring heterotrophic features. β-null deviation analysis illustrated that amelioration practices weakened the deterministic processes in structuring coastal saline soil microbial communities. These results advanced our understanding of the responses of the soil microbiome to amelioration practices and provided useful information for developing microbe-based remediation approaches in coastal saline soils.

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Sustainable management of coastal saline soils in the Saloum river Basin, Senegal

Cited by 7 publications

References 33 publications

Improving the Chemical Properties of Acid Sulphate Soils from the Casamance River Basin

Improving the Chemical Properties of Acid Sulphate Soils from the Casamance River Basin

Effets comparatifs du biochar, du phosphogypse et des résidus de baobab (Adansonia digitata) sur les activités microbiennes des sols salés de la cuvette rizicole Thiagar dans la Vallée du Fleuve Sénégal

Long-Term Amelioration Practices Reshape the Soil Microbiome in a Coastal Saline Soil and Alter the Richness and Vertical Distribution Differently Among Bacterial, Archaeal, and Fungal Communities

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