Soil organic carbon monitoring to assess agricultural climate change adaptation practices in Navarre, Spain

Antón, Rodrigo; Arricibita, F J; Ruiz-Sagaseta, Alberto; Enrique, Alberto; Soto, Isabel de; Orcaray, Luis; Zaragüeta, Armelle; Virto, Iñigo

doi:10.1007/s10113-021-01788-w

Cited by 11 publications

(7 citation statements)

References 69 publications

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“…This dominance of stabilization over mineralization was related to the observed difference in MRT 2 between the irrigated and rainfed maize subareas (+28% in M-irr than in M-rf, Figure 8). In terms of projected SOC stocks in the new steady state equilibrium (TOC ss ), the projection was 2.50 times the initial value of TOC in M-irr, and 1.23 times in M-rf (Supplementary Tables 6, 7; Supplementary Figure 3), in line with the trend observed in TOC data in the first 7 years of this study, and within the range of field observations in a previous study in the region on calcareous soils (32,33). The possible limitations of the fractionation procedure, together with the relatively short duration of the study, hinder however, to draw clear conclusions from these observations (58).…”

Section: Irrigation and Soc Dynamicssupporting

confidence: 90%

“…An important one is whether the change of use is likely to imply a transition period in which SOC stocks are not at steady state. For example, in a regional study conducted in Navarre (NE Spain), a positive effect of irrigation in terms of SOC storage was observed (32), but with variable annual rates depending on crops, climate and/or soil type (33). Understanding the mechanisms of SOC dynamics during this transition period remains a major research question (10).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Irrigation and Soc Dynamicssupporting

confidence: 90%

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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“…Disaggregating management from pedogenetic conditions requires a diversity of studies across different ecoregions. As well, environment × management interactions might change along with a changing climate, which may not only affect temperature and precipitation in a region, but also the types of management that become most appropriate to adapt to biophysical changes in the climate (Gusli et al 2020;Lal 2020;Anton et al 2021). Developing agricultural management approaches to foster soils in becoming net positive C sinks has become a global priority (Minasny et al 2017;Rumpel et al 2020), so more field studies with similar management comparisons across a diversity of environments will be necessary to formulate best adaptation strategies to climate change.…”

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confidence: 99%

Soil organic carbon and nitrogen storage estimated with the root-zone enrichment method under conventional and conservation land management across North Carolina

Franzluebbers¹

2023

Journal of Soil and Water Conservation

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Agriculture is a globally dominating land use, so efforts to restore soil organic carbon (C) and nitrogen (N) lost through historical degradation could have enormous benefits to production and the environment, particularly by storing an organic reserve of nutrients in soil and avoiding the return of a small portion of biologically cycling C to the atmosphere. Estimates of soil organic C and N storage from conservation agricultural management are still limited when considered in proportion to the large diversity of environmental and edaphic conditions. A study was undertaken to determine the total, baseline, and root-zone enrichment stocks of soil organic C and N as affected by land use on 25 research stations distributed throughout North Carolina. Root-zone enrichment of organic matter is that portion influenced by contemporary management, and baseline is that portion dominated by pedogenesis. These fractions were compared with more traditional estimation procedures. Soil organic C and N were strongly negatively associated with sand concentration. Although physiographic region influenced overall soil C and N contents, variations in soil type and research station management within a region were equally influential. Soil organic C and N stocks were strongly affected by land use, which did not interact with the soil textural effect. Across the 25 research station locations, root-zone enrichment of soil organic C followed the order (p < 0.01) conventional-till cropland (11.1 Mg C ha -1 ) < no-till cropland (21.5 Mg C ha -1 ) < grassland (29.6 Mg C ha -1 ) < woodland (38.6 Mg C ha -1 ). Root-zone enrichment of total soil N followed a similar order, except grassland and woodland effects were reversed. Root-zone enrichment provided an integrated soil-profile assessment and a more targeted response of soil organic C and N change than did more traditional paired land use approaches, primarily due to separation of a variable pedogenic influence among sites. These point-in-time results gave a clear indication that conservation agricultural management approaches will foster surface soil organic C and N restoration across a diversity of soil types in the southeastern United States.

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“…The indicators chosen for this study are commonly related to soil porosity and generally used to assess the soil physical condition and biological activity in agricultural soils. Fertilization with organic materials frequently results in an increase in SOC stock (Antón et al, 2021), which can positively affect the development of stable aggregates (Abiven et al, 2009), and result in more efficient carbon and water storage. All these effects can be directly or indirectly related to the quantity and quality of soil pores.…”

Section: Discussionmentioning

confidence: 99%

Effects of long‐term sewage sludge application to a calcareous soil structure

Simões‐Mota

Virto

Poch

2022

Soil Use and Management

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Agricultural soils face a major threat as consequence of decades of conventional agricultural practices (Pagliai & Vignozzi, 2002). Long-term depletion of soil organic matter (SOM) leads to physical degradation (Jensen et al., 2019;Kopittke et al., 2020), as the soil is more vulnerable to erosion and compaction and less able to stabilize SOM.Organic wastes, such as sewage sludge (SS), are a resource that can be converted to fertilizer (Metcalf &

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Soil organic carbon monitoring to assess agricultural climate change adaptation practices in Navarre, Spain

Cited by 11 publications

References 69 publications

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

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

Soil organic carbon and nitrogen storage estimated with the root-zone enrichment method under conventional and conservation land management across North Carolina

Effects of long‐term sewage sludge application to a calcareous soil structure

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