Role of Carbonates in the Physical Stabilization of Soil Organic Matter in Agricultural Mediterranean Soils

Virto, Iñigo; Antón, Rodrigo; Apesteguía, Marcos; Plante, Alain F.

doi:10.1016/b978-0-12-812128-3.00009-4

Cited by 19 publications

(14 citation statements)

References 55 publications

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“…Since the herbicide application prevents grass growth, the addition of fresh organic matter to soil is stopped. On the contrary, mulching practice adds organic matter to the soil surface where it slowly decomposes, feeding back the organic matter to the soil, which was proven to partially alleviate the soil compaction [37] through its effects on the formation of soil structure [38]. Previous studies revealed that herbicide applications negatively impact soil compaction [39].…”

Section: Discussionmentioning

confidence: 99%

Soil Management and Slope Impacts on Soil Properties, Hydrological Response, and Erosion in Hazelnut Orchard

2021

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Proper soil management is crucial to mitigate soil degradation. Hazelnut orchards are often raised on slopes and intensively managed, which makes them similar to the already defined highly erodible land uses like vineyards. This research aims to assess the impacts of soil management and the slope on the soil properties, hydrological response, and erosion in the hazelnut orchard. At eastern Croatia on Cambisols, four treatments were chosen, representing two soil managements in the study area (herbicide and mulched) on two different slope inclinations (high ~9° and low ~4.5°), for rainfall simulation experiments and soil sampling. The herbicide treatments on both slopes removed soil cover and reduced (p < 0.05) soil organic matter, mean weight diameter, and water-stable aggregates. Mulched treatments recorded a lower (p < 0.05) bulk density. These soil properties affected soil hydrological response, as the reduction of infiltration in herbicide plots lead to higher water and sediment losses. The higher slope increased erosion in herbicide soil to over 2.2 t ha−1. Mulching was shown as a superior practice as it enhances soil properties and reduces soil erosion, even reducing the effect of the higher slope on erosional processes.

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Section: Discussionmentioning

confidence: 99%

Soil Management and Slope Impacts on Soil Properties, Hydrological Response, and Erosion in Hazelnut Orchard

2021

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“…Coarse Organic acids were responsible for mobilization or complexation of cations by raising the pH and neutralizing aluminum (VIRTO et al, 2018). However, Oerter et al (2014) reported that the interrelationships among K, Ca, and Mg should be considered in the dynamics of ion exchange in the soils.…”

Section: Layermentioning

confidence: 99%

Relationship Between Physical and Chemical Properties of Entisols-Fluvents and Erosion in the São Francisco River

et al. 2021

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The intense anthropization in the lower São Francisco River and surrounding areas can lead to environmental degradation risks and, above all, makes the area more susceptible to soil erosion. This study aimed to identify and correlate the physical and chemical properties able to enhance erosive processes and slope instability in the watercourse margins of the lower São Francisco River, in Sergipe State, Brazil. To this end, disturbed and undisturbed samples of an Entisol-Fluvent soil were collected in the region, specifically in the city of Amparo de São Francisco. Physical (density, porosity, and texture) and chemical (pH, cation exchange capacity, base saturation, micro-, and macronutrients) analyses were performed. All physical properties and organic carbon contents were higher in the surface layers (Ap and AC) compared to the others. Organic carbon, phosphorus, and micronutrients had a negative correlation with soil density, showing higher contents and lower soil densities in the Ap and AC layers. The pedological characteristics of the evaluated soil layers are unable to provide soil resistance to water erosion.

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“…These soils are from the orders Alfisols, Mollisols, and Vertisols, which are dominant soils in grassland biomes across large areas of North America and Eurasia (28). The Mollisol we studied is typical of soils common in arid and semiarid biomes (33).…”

Section: Significancementioning

confidence: 99%

Multiple constraints cause positive and negative feedbacks limiting grassland soil CO₂efflux under CO₂enrichment

Fay

Hui

Jackson

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Terrestrial ecosystems are increasingly enriched with resources such as atmospheric CO2 that limit ecosystem processes. The consequences for ecosystem carbon cycling depend on the feedbacks from other limiting resources and plant community change, which remain poorly understood for soil CO2 efflux, JCO2, a primary carbon flux from the biosphere to the atmosphere. We applied a unique CO2 enrichment gradient (250 to 500 µL L−1) for eight years to grassland plant communities on soils from different landscape positions. We identified the trajectory of JCO2 responses and feedbacks from other resources, plant diversity [effective species richness, exp(H)], and community change (plant species turnover). We found linear increases in JCO2 on an alluvial sandy loam and a lowland clay soil, and an asymptotic increase on an upland silty clay soil. Structural equation modeling identified CO2 as the dominant limitation on JCO2 on the clay soil. In contrast with theory predicting limitation from a single limiting factor, the linear JCO2 response on the sandy loam was reinforced by positive feedbacks from aboveground net primary productivity and exp(H), while the asymptotic JCO2 response on the silty clay arose from a net negative feedback among exp(H), species turnover, and soil water potential. These findings support a multiple resource limitation view of the effects of global change drivers on grassland ecosystem carbon cycling and highlight a crucial role for positive or negative feedbacks between limiting resources and plant community structure. Incorporating these feedbacks will improve models of terrestrial carbon sequestration and ecosystem services.

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Role of Carbonates in the Physical Stabilization of Soil Organic Matter in Agricultural Mediterranean Soils

Cited by 19 publications

References 55 publications

Soil Management and Slope Impacts on Soil Properties, Hydrological Response, and Erosion in Hazelnut Orchard

Soil Management and Slope Impacts on Soil Properties, Hydrological Response, and Erosion in Hazelnut Orchard

Relationship Between Physical and Chemical Properties of Entisols-Fluvents and Erosion in the São Francisco River

Multiple constraints cause positive and negative feedbacks limiting grassland soil CO₂efflux under CO₂enrichment

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Role of Carbonates in the Physical Stabilization of Soil Organic Matter in Agricultural Mediterranean Soils

Cited by 19 publications

References 55 publications

Soil Management and Slope Impacts on Soil Properties, Hydrological Response, and Erosion in Hazelnut Orchard

Soil Management and Slope Impacts on Soil Properties, Hydrological Response, and Erosion in Hazelnut Orchard

Relationship Between Physical and Chemical Properties of Entisols-Fluvents and Erosion in the São Francisco River

Multiple constraints cause positive and negative feedbacks limiting grassland soil CO2efflux under CO2enrichment

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Multiple constraints cause positive and negative feedbacks limiting grassland soil CO₂efflux under CO₂enrichment