Effect of the Conversion to Irrigation of Semiarid Mediterranean Dryland Agrosecoystems on Soil Carbon Dynamics and Soil Aggregation

Apesteguía, Marcos; Virto, Iñigo; Orcaray, Luis; Enrique, Alberto; Bescansa, Paloma

doi:10.1080/15324982.2015.1016245

Cited by 19 publications

(13 citation statements)

References 31 publications

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“…In relation to SQ indicators, we had hypothesized that their sensitivity to soil management may have changed because of the changes induced in the soil organic C cycle by the introduction of irrigation [46]. Results showed that many remained different between tillage systems after the adoption of irrigation (in particular, the two physical indicators (BD and PR), total N, extractable K, SOC and earthworm biomass), as observed in rainfed conditions [18].…”

Section: Soil Quality Indicator Selection-dryland Vs Irrigated Soil mentioning

confidence: 89%

“…These effects have been reported not only on the organic C and chemical fertility of the soil [42,43], but also on its physical condition [44] and biological indicators [45]. 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].…”

Section: Introductionmentioning

confidence: 99%

“…It is known that irrigation modifies SOC mineralization rates, as more water is available when temperatures are adequate for microbial degradation of organic matter [72], regardless of the tillage system used. Increased mineralization rates have indeed been reported as a reason for no changes in SOC stocks observed following irrigation adoption in the region in the short-term [46], and for SOC losses in the long-term in other semi-arid areas [52], most likely associated to improved soil moisture conditions and nutrients availability [73][74][75].…”

Section: Soil Quality Indicator Selection-dryland Vs Irrigated Soil mentioning

confidence: 99%

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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: Soil Quality Indicator Selection-dryland Vs Irrigated Soil mentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Soil Quality Indicator Selection-dryland Vs Irrigated Soil mentioning

confidence: 99%

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

et al. 2017

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“…In Mediterranean climate regions, an increasing number of rainfed areas are transformed to irrigation to stabilize or increase crop yields (Apesteguía et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Long-term no-till as a means to maintain soil surface structure in an agroecosystem transformed into irrigation

Pareja-Sánchez

Plaza‐Bonilla

Ramos

et al. 2017

Soil and Tillage Research

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“…In arid and semiarid regions, as is the case in Mediterranean areas, crop productivity is severely limited by water availability (Apesteguía, Virto, Orcaray, Enrique, & Bescansa, 2015; Cantero‐Martínez, Angás, & Lampurlanés, 2007). The main production system in the rainfed Mediterranean areas has been the monoculture cropping of winter cereals (primarily barley and wheat), whose yield is highly dependent on seasonal rainfall and water storage capacity of the soil (Austin, Cantero‐Martínez, Arrúe, Playán, & Cano‐Marcellán, 1998).…”

Section: Introductionmentioning

confidence: 99%

Soil organic carbon sequestration when converting a rainfed cropping system to irrigated corn under different tillage systems and N fertilizer rates

Pareja-Sánchez

Cantero‐Martínez

Álvaro‐Fuentes

et al. 2020

Soil Science Soc of Amer J

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The aim of this study was to evaluate the impact of 21 years of tillage and N fertilization and the conversion from a rainfed to an irrigated cropping system on soil organic C (SOC). The study was carried out in northeastern Spain in a long‐term tillage and N rate field experiment established in 1996 under barley rainfed conditions, which in 2015 was converted into irrigation with corn. Three types of tillage (conventional tillage, CT; reduced tillage, RT; no‐tillage, NT) and three mineral N fertilization rates (0, 60, and 120 kg N ha−1 under barley, and 0, 200, and 400 kg N ha−1 under corn) were compared. Annual C‐inputs as aboveground crop residues and annual SOC sequestration rate (∆SOCrate) (0–40 cm depth) were calculated in three different periods (P1, P2 and P3) under rainfed (‐R) and irrigated (‐I) conditions (P1‐R, from 1996 to 2009; P2‐R, from 2009 to 2015; P3‐I, from 2015 to 2017). At the end of P3‐I, particulate organic C (POC) was measured from the 0–5, 5–10, 10–20, 20–30, and 30–40 cm depths. Averaged over all treatments, ∆SOCrate was 492, 222, and 969 kg C ha−1 yr−1 for P1‐R, P2‐R, and P3‐I, respectively. In P1‐R and P3‐I, C‐input explained 70% of the variability of ∆SOCrate. In P1‐R, ∆SOCrate followed the order NT > RT > CT, while for N rate, order was high > medium > 0. In P3‐I at the highest N rate, ∆SOCrate followed the order NT > RT > CT. In P2‐R, ∆SOCrate did not show differences between tillage and/or N rate treatments. The increase in SOC after conversion from a rainfed to an irrigation system was mainly explained by POC, which was increased by 75% compared to the previous rainfed period. The modification of the cropping system through the introduction of irrigation and adequate crop management practices under no‐tillage and adjusted N fertilizer rates can contribute to the sequestration of large amounts of atmospheric CO2.

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Effect of the Conversion to Irrigation of Semiarid Mediterranean Dryland Agrosecoystems on Soil Carbon Dynamics and Soil Aggregation

Cited by 19 publications

References 31 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

Long-term no-till as a means to maintain soil surface structure in an agroecosystem transformed into irrigation

Soil organic carbon sequestration when converting a rainfed cropping system to irrigated corn under different tillage systems and N fertilizer rates

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