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The impact of agricultural management on soil aggregation and carbon storage is regulated by climatic thresholds across a 3000 km European gradient.

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Title: The impact of agricultural management on soil aggregation and carbon storage is regulated by climatic thresholds across a 3000 km European gradient.
Authors: Edlinger, Anna1,2 (AUTHOR) anna.edlinger@wur.nl, Garland, Gina1,3 (AUTHOR), Banerjee, Samiran4 (AUTHOR), Degrune, Florine5,6,7 (AUTHOR), García‐Palacios, Pablo8 (AUTHOR), Herzog, Chantal1,2 (AUTHOR), Pescador, David Sánchez9 (AUTHOR), Romdhane, Sana10 (AUTHOR), Ryo, Masahiro5,6,11,12 (AUTHOR), Saghaï, Aurélien13 (AUTHOR), Hallin, Sara13 (AUTHOR), Maestre, Fernando T.14,15 (AUTHOR), Philippot, Laurent10 (AUTHOR), Rillig, Matthias C.5,6 (AUTHOR), van der Heijden, Marcel G. A.1,2 (AUTHOR) marcel.vanderheijden@agroscope.admin.ch
Source: Global Change Biology. Jun2023, Vol. 29 Issue 11, p3177-3192. 16p.
Subjects: Agriculture, Soil management, Carbon in soils, Soil structure, Topsoil, Grassland soils, Crop management
Abstract: Organic carbon and aggregate stability are key features of soil quality and are important to consider when evaluating the potential of agricultural soils as carbon sinks. However, we lack a comprehensive understanding of how soil organic carbon (SOC) and aggregate stability respond to agricultural management across wide environmental gradients. Here, we assessed the impact of climatic factors, soil properties and agricultural management (including land use, crop cover, crop diversity, organic fertilization, and management intensity) on SOC and the mean weight diameter of soil aggregates, commonly used as an indicator for soil aggregate stability, across a 3000 km European gradient. Soil aggregate stability (−56%) and SOC stocks (−35%) in the topsoil (20 cm) were lower in croplands compared with neighboring grassland sites (uncropped sites with perennial vegetation and little or no external inputs). Land use and aridity were strong drivers of soil aggregation explaining 33% and 20% of the variation, respectively. SOC stocks were best explained by calcium content (20% of explained variation) followed by aridity (15%) and mean annual temperature (10%). We also found a threshold‐like pattern for SOC stocks and aggregate stability in response to aridity, with lower values at sites with higher aridity. The impact of crop management on aggregate stability and SOC stocks appeared to be regulated by these thresholds, with more pronounced positive effects of crop diversity and more severe negative effects of crop management intensity in nondryland compared with dryland regions. We link the higher sensitivity of SOC stocks and aggregate stability in nondryland regions to a higher climatic potential for aggregate‐mediated SOC stabilization. The presented findings are relevant for improving predictions of management effects on soil structure and C storage and highlight the need for site‐specific agri‐environmental policies to improve soil quality and C sequestration. [ABSTRACT FROM AUTHOR]
Copyright of Global Change Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The impact of agricultural management on soil aggregation and carbon storage is regulated by climatic thresholds across a 3000 km European gradient.
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  Data: <searchLink fieldCode="AR" term="%22Edlinger%2C+Anna%22">Edlinger, Anna</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> anna.edlinger@wur.nl</i><br /><searchLink fieldCode="AR" term="%22Garland%2C+Gina%22">Garland, Gina</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Banerjee%2C+Samiran%22">Banerjee, Samiran</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Degrune%2C+Florine%22">Degrune, Florine</searchLink><relatesTo>5,6,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22García‐Palacios%2C+Pablo%22">García‐Palacios, Pablo</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Herzog%2C+Chantal%22">Herzog, Chantal</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pescador%2C+David+Sánchez%22">Pescador, David Sánchez</searchLink><relatesTo>9</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Romdhane%2C+Sana%22">Romdhane, Sana</searchLink><relatesTo>10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ryo%2C+Masahiro%22">Ryo, Masahiro</searchLink><relatesTo>5,6,11,12</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Saghaï%2C+Aurélien%22">Saghaï, Aurélien</searchLink><relatesTo>13</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hallin%2C+Sara%22">Hallin, Sara</searchLink><relatesTo>13</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maestre%2C+Fernando+T%2E%22">Maestre, Fernando T.</searchLink><relatesTo>14,15</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Philippot%2C+Laurent%22">Philippot, Laurent</searchLink><relatesTo>10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rillig%2C+Matthias+C%2E%22">Rillig, Matthias C.</searchLink><relatesTo>5,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22van+der+Heijden%2C+Marcel+G%2E+A%2E%22">van der Heijden, Marcel G. A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> marcel.vanderheijden@agroscope.admin.ch</i>
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  Data: <searchLink fieldCode="JN" term="%22Global+Change+Biology%22">Global Change Biology</searchLink>. Jun2023, Vol. 29 Issue 11, p3177-3192. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Agriculture%22">Agriculture</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+management%22">Soil management</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+in+soils%22">Carbon in soils</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+structure%22">Soil structure</searchLink><br /><searchLink fieldCode="DE" term="%22Topsoil%22">Topsoil</searchLink><br /><searchLink fieldCode="DE" term="%22Grassland+soils%22">Grassland soils</searchLink><br /><searchLink fieldCode="DE" term="%22Crop+management%22">Crop management</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Organic carbon and aggregate stability are key features of soil quality and are important to consider when evaluating the potential of agricultural soils as carbon sinks. However, we lack a comprehensive understanding of how soil organic carbon (SOC) and aggregate stability respond to agricultural management across wide environmental gradients. Here, we assessed the impact of climatic factors, soil properties and agricultural management (including land use, crop cover, crop diversity, organic fertilization, and management intensity) on SOC and the mean weight diameter of soil aggregates, commonly used as an indicator for soil aggregate stability, across a 3000 km European gradient. Soil aggregate stability (−56%) and SOC stocks (−35%) in the topsoil (20 cm) were lower in croplands compared with neighboring grassland sites (uncropped sites with perennial vegetation and little or no external inputs). Land use and aridity were strong drivers of soil aggregation explaining 33% and 20% of the variation, respectively. SOC stocks were best explained by calcium content (20% of explained variation) followed by aridity (15%) and mean annual temperature (10%). We also found a threshold‐like pattern for SOC stocks and aggregate stability in response to aridity, with lower values at sites with higher aridity. The impact of crop management on aggregate stability and SOC stocks appeared to be regulated by these thresholds, with more pronounced positive effects of crop diversity and more severe negative effects of crop management intensity in nondryland compared with dryland regions. We link the higher sensitivity of SOC stocks and aggregate stability in nondryland regions to a higher climatic potential for aggregate‐mediated SOC stabilization. The presented findings are relevant for improving predictions of management effects on soil structure and C storage and highlight the need for site‐specific agri‐environmental policies to improve soil quality and C sequestration. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Global Change Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1111/gcb.16677
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 3177
    Subjects:
      – SubjectFull: Agriculture
        Type: general
      – SubjectFull: Soil management
        Type: general
      – SubjectFull: Carbon in soils
        Type: general
      – SubjectFull: Soil structure
        Type: general
      – SubjectFull: Topsoil
        Type: general
      – SubjectFull: Grassland soils
        Type: general
      – SubjectFull: Crop management
        Type: general
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      – TitleFull: The impact of agricultural management on soil aggregation and carbon storage is regulated by climatic thresholds across a 3000 km European gradient.
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              Text: Jun2023
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