A model for field-based evidences of the impact of irrigation on carbonates in the tilled layer of semi-arid Mediterranean soils

García, Isabel Sonsoles de Soto; Virto, Iñigo; Barré, Pierre; Fernández‐Ugalde, Oihane; Antón, Rodrigo; Martínez, Isabelle; Chaduteau, Carine; Enrique, Alberto; Bescansa, Paloma

doi:10.1016/j.geoderma.2017.03.005

Cited by 25 publications

(11 citation statements)

References 26 publications

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“…Previous studies in the area have shown that the turn-over rates of organic C can be accelerated in the short-term [46], very likely because of changes induced in the shoot-to-root ratios of some crops, and the less limiting conditions for soil C mineralization. In addition, inorganic C dynamics can be affected [47]. These observations are in line with previous studies conducted in other regions where changes in the total organic C stored in the soil have been observed following the adoption of irrigation [48,49].…”

Section: Introductionsupporting

confidence: 89%

Tillage Effects on Soil Quality after Three Years of Irrigation in Northern Spain

et al. 2017

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Abstract:Irrigation is being initiated on large areas of traditionally rainfed land to meet increasing global demand for food, feed, fiber and fuel. However, the consequences of this transition on soil quality (SQ) have scarcely been studied. Therefore, after previously identifying the most tillage-sensitive SQ indicators under long-term rainfed conditions, conversion of a research site on a Haplic Calcisol in Navarre, in northeast Spain provided an ideal location to reevaluate those SQ indicators after three years of irrigated management. The Soil Management Assessment Framework (SMAF) was used to test our hypothesis that adopting irrigation could change the sensitivity and importance of non-irrigated SQ indicators. Several soil physical, chemical, and biological indicators along with crop yields were used to evaluate SQ three years after initiating irrigation on a long-term conventional tillage (CT), minimum tillage (MT) and no-tillage (NT) study where either barley (Hordeum vulgare L.) or wheat (Triticum aestivum L.) was being grown. The results confirmed our hypothesis that irrigation would change the relative importance of various SQ indicators and suggested that some SMAF algorithms, such as those used to assess bulk density, needed to be recalibrated for these Mediterranean soils.

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Section: Introductionsupporting

confidence: 89%

Tillage Effects on Soil Quality after Three Years of Irrigation in Northern Spain

et al. 2017

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“…Carbonate content has been reported to be affected under both CT and NT (Neugschwandtner et al, 2014;Ye et al, 2020). Tillage affects CaCO3 content through the induced changes in the soil water regime, enhanced leaching and by bringing, carbonate particles to the surface layer of the soil profile (Murillo et al, 2004;de Soto et al, 2017;Ye et al, 2020). In our study area, long-term investigations are needed to elucidate the mechanisms behind changes in CaCO3 content under tillage and no-till regimes taking into account other factors related to cultivation practices (fertilization, irrigation, …) and local geochemical conditions.…”

Section: Responses Of Soil Chemical Quality Indicators To Tillage Man...mentioning

confidence: 99%

Effects of conservation and standard tillage on soil physico-chemical properties and overall quality in a semi-arid agrosystem

et al. 2021

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Context Shifting agricultural operations to more sustainable management practices is needed in the face of a changing climate. Aims In this study, the short-term effects of three tillage systems (no tillage, minimum tillage and conventional tillage) on a wide selection of soil properties in a semi-arid agrosystem of eastern Tunisia were assessed. Methods The studied soil properties included saturation percentage, bulk density, penetration resistance, mean weight diameter, electric conductivity, soil reaction, soil organic matter, carbonates, available phosphorus and exchangeable potassium. The impacts of tillage systems on soil quality indices (SQI) developed based on the total set of properties (SQI-T), or a minimum set (SQI-M) selected through principal component analysis, were also investigated. Key results Relative to conventional tillage, no tillage increased bulk density, penetration resistance and electrical conductivity, whereas minimum tillage affected only saturation percentage and pH. No tillage and minimum tillage did not enhance soil quality relative to conventional tillage. The SQI-T and SQI-M were highly correlated (r = 0.93) to each other suggesting that the outcomes of the two indices are comparable. Principal component analysis efficiently selected the most influential indicators of the effects of tillage systems on soil quality. Conclusions and implications Farmers in the study region are encouraged to consider minimum tillage during the early years of transition from standard to no tillage systems to avoid rapid decline in soil quality and consequent yield loss.

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“…In this sense, the protective nature of carbonate-rich soil matrixes could play a significant role in irrigated calcareous soils. In addition to the well-known higher stability of organic forms in Ca-rich soils compared to other soils in similar conditions (24,25), carbonates can be sensitive to both moisture changes and acidification by increased roots respiration (26,27), which should be accounted for when assessing the environmental and agronomic impacts of irrigation adoption in calcareous soils (28). A need for site-specific research to correctly assess this effect in the long term is therefore needed (13,17,29,30).…”

Section: Introductionmentioning

confidence: 99%

Organic Carbon Storage and Dynamics as Affected by the Adoption of Irrigation in a Cultivated Calcareous Mediterranean Soil

et al. 2022

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Irrigation is in the spotlight of land-use planning in semi-arid and sub-humid regions. It can be a promising practice to promote soil organic C storage (SOC), although it may also involve an increase in soil GHG emissions. Assessing the impact of its adoption on SOC storage is crucial to better understand its potential role in terms of agricultural sustainability and climate policies. In this study, we measured and modeled the changes in soil organic C storage and dynamics in the tilled soil layer (0–30 cm) of an experimental field on a calcareous soil with two different crops (maize, a C4 plant, and wheat, a C3 plant), cultivated with and without irrigation for 7 years. We hypothesized that changes in SOC storage occur when introducing irrigation and/or different crops in an agrosystem, and that they would be related to changes in the incorporation of crop residues, their partitioning between the labile and the stable fraction, and C losses by mineralization. Our results validated theses hypotheses only partially. Over the 7-year study period, irrigation significantly increased total (TOC) and sand-size (50–2,000 μm) particulate organic C (POC50−2,000) stocks in the tilled layer (0–30 cm): +7.1% TOC and +12.1% POC50−2,000 for maize, and +7.0 and +12.3% for wheat. A parallel two-pool SOC model based on TOC and POC50−2,000 fractions and the C3-C4 plant shift allowed understanding that the observed changes in SOC storage were most likely related to an increase in C inputs from crop residues, and to a more efficient incorporation of these residues with irrigation. The mean residence time of SOC in the two modeled pools did not allow to support our hypothesis of changes in SOC mineralization with irrigation. The limitations of SOC fractionation, which implied that some labile fractions might have been lost from POC50−2,000 and recovered in the fraction identified as slow-turning, together with the interaction of the carbonate-rich mineral phase of this soil can explain at least partially this observation. We conclude that irrigation can contribute to effectively increase SOC storage in the mid-term, but its effect might be dependent upon the type of crops and soil.

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A model for field-based evidences of the impact of irrigation on carbonates in the tilled layer of semi-arid Mediterranean soils

Cited by 25 publications

References 26 publications

Tillage Effects on Soil Quality after Three Years of Irrigation in Northern Spain

Tillage Effects on Soil Quality after Three Years of Irrigation in Northern Spain

Effects of conservation and standard tillage on soil physico-chemical properties and overall quality in a semi-arid agrosystem

Organic Carbon Storage and Dynamics as Affected by the Adoption of Irrigation in a Cultivated Calcareous Mediterranean Soil

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