2
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Soil organic carbon under conservation agriculture in Mediterranean and humid subtropical climates: Globalmeta‐analysis

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Conservation agriculture (CA) is an agronomic system based on minimum soil disturbance (no‐tillage, NT), permanent soil cover, and species diversification. The effects of NT on soil organic carbon (SOC) changes have been widely studied, showing somewhat inconsistent conclusions, especially in relation to the Mediterranean and humid subtropical climates. These areas are highly vulnerable and predicted climate change is expected to accentuate desertification and, for these reasons, there is a need for clear agricultural guidelines to preserve or increment SOC. We quantitively summarized the results of 47 studies all around the world in these climates investigating the sources of variation in SOC responses to CA, such as soil characteristics, agricultural management, climate, and geography. Within the climatic area considered, the overall effect of CA on SOC accumulation in the plough layer (0–0.3 m) was 12% greater in comparison to conventional agriculture. On average, this result corresponds to a carbon increase of 0.48 Mg C ha −1 year −1. However, the effect was variable depending on the SOC content under conventional agriculture: it was 20% in soils which had ≤ 40 Mg C ha −1, while it was only 7% in soils that had > 40 Mg C ha −1. We proved that 10 years of CA impact the most on soil with SOC ≤ 40 Mg C ha −1. For soils with less than 40 Mg C ha −1, increasing the proportion of crops with bigger residue biomasses in a CA rotation was a solution to increase SOC. The effect of CA on SOC depended on clay content only in soils with more than 40 Mg C ha −1and become null with a SOC/clay index of 3.2. Annual rainfall (that ranged between 331–1850 mm y −1) and geography had specific effects on SOC depending on its content under conventional agriculture. In conclusion, SOC increments due to CA application can be achieved especially in agricultural soils with less than 40 Mg C ha −1and located in the middle latitudes or in the dry conditions of Mediterranean and humid subtropical climates.

          Highlights

          • The results of 47 studies were quantitively summarized by using a meta‐analysis

          • SOC accumulation due to CA was 12% greater compared to conventional agriculture

          • SOC increment due to CA can reach 20% in soils having less than 40 Mg C ha −1

          • The impacts of pedo‐climatic factors and agronomic management practices were studied

          Related collections

          Most cited references77

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          The PRISMA 2020 statement: an updated guideline for reporting systematic reviews

          The Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) statement, published in 2009, was designed to help systematic reviewers transparently report why the review was done, what the authors did, and what they found. Over the past decade, advances in systematic review methodology and terminology have necessitated an update to the guideline. The PRISMA 2020 statement replaces the 2009 statement and includes new reporting guidance that reflects advances in methods to identify, select, appraise, and synthesise studies. The structure and presentation of the items have been modified to facilitate implementation. In this article, we present the PRISMA 2020 27-item checklist, an expanded checklist that details reporting recommendations for each item, the PRISMA 2020 abstract checklist, and the revised flow diagrams for original and updated reviews.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Conducting Meta-Analyses inRwith themetaforPackage

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              bibliometrix : An R-tool for comprehensive science mapping analysis

                Bookmark

                Author and article information

                Contributors
                (View ORCID Profile)
                (View ORCID Profile)
                (View ORCID Profile)
                (View ORCID Profile)
                (View ORCID Profile)
                Journal
                European Journal of Soil Science
                European J Soil Science
                Wiley
                1351-0754
                1365-2389
                January 2023
                February 02 2023
                January 2023
                : 74
                : 1
                Affiliations
                [1 ]DiSAA, Department of Agricultural and Environmental Sciences University of Milan Milan Italy
                [2 ]European Commission Joint Research Centre (JRC) Ispra Italy
                [3 ]Natural Resources Institute Finland (Luke) Bioeconomy and Environment, Sustainability Science and Indicators Jokioinen Finland
                Article
                10.1111/ejss.13338
                bcddd8d1-faeb-4e78-bd8e-6195824a94ce
                © 2023

                http://creativecommons.org/licenses/by-nc-nd/4.0/

                History

                Comments

                Comment on this article