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Short-Term Effect of Different Inputs of Organic Amendments from Olive Oil Industry By-Products on Soil Organic Carbon and Physical Properties

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  • Nadia Vignozzi

    (CREA-AA—Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, Centro di Ricerca Agricoltura e Ambiente, Via Lanciola 12/A, 50125 Firenze, Italy)

  • Maria Costanza Andrenelli

    (CREA-AA—Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, Centro di Ricerca Agricoltura e Ambiente, Via Lanciola 12/A, 50125 Firenze, Italy)

  • Alessandro Elio Agnelli

    (CREA-AA—Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, Centro di Ricerca Agricoltura e Ambiente, Via Lanciola 12/A, 50125 Firenze, Italy)

  • Angelo Fiore

    (CREA-AA—Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, Centro di Ricerca Agricoltura e Ambiente, Via Celso Ulpiani 5, 70125 Bari, Italy)

  • Sergio Pellegrini

    (CREA-AA—Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, Centro di Ricerca Agricoltura e Ambiente, Via Lanciola 12/A, 50125 Firenze, Italy)

Abstract

Maintaining adequate levels of soil organic matter in Mediterranean agro-ecosystems is a pressing need due to the increasing evidence of climate change. The use of by-products of the olive oil industry as organic amendments could contribute to this goal. We report the results of a 2-year research carried out in southern Italy on a clay loam soil for evaluating the effects of different olive oil industry by-products on soil organic carbon and other related soil characteristics. The treatments were: (i) Olive mill wastewater (OMW), (ii) compost from olive pomace (CP1), (iii) compost from olive pomace in double quantity (CP2), and (iv) organo-mineral fertilizer (OMF). Soil samples, collected at a depth of 0–20 cm, were analyzed for total organic carbon (TOC), its extractable (TEC) and humic fractions (HC), and aggregate stability (Ist). In addition, soil macroporosity, water retention, and penetration resistance (PR) were evaluated. CP1 induced the largest increase in soil TOC, TEC, and HC content, and a significant improvement in Ist; the addition of a large quantity of organic carbon (CP2) did not determine a proportional increase in soil organic matter content. The aggregate stability of the CP2 was the lowest; nevertheless, the characterization of macroporosity indicated an improvement of soil structure functionality. With respect to control (OMF), OMW had a significant decrease in Ist and an increase in PR of the uppermost soil layer.

Suggested Citation

  • Nadia Vignozzi & Maria Costanza Andrenelli & Alessandro Elio Agnelli & Angelo Fiore & Sergio Pellegrini, 2023. "Short-Term Effect of Different Inputs of Organic Amendments from Olive Oil Industry By-Products on Soil Organic Carbon and Physical Properties," Land, MDPI, vol. 12(8), pages 1-13, August.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:8:p:1628-:d:1220251
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    References listed on IDEAS

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    1. Zema, Demetrio Antonio & Esteban Lucas-Borja, Manuel & Andiloro, Serafina & Tamburino, Vincenzo & Zimbone, Santo Marcello, 2019. "Short-term effects of olive mill wastewater application on the hydrological and physico-chemical properties of a loamy soil," Agricultural Water Management, Elsevier, vol. 221(C), pages 312-321.
    2. Márcio R. Nunes & Douglas L. Karlen & Thomas B. Moorman, 2020. "Tillage Intensity Effects on Soil Structure Indicators—A US Meta-Analysis," Sustainability, MDPI, vol. 12(5), pages 1-17, March.
    3. Parascanu, M.M. & Puig Gamero, M. & Sánchez, P. & Soreanu, G. & Valverde, J.L. & Sanchez-Silva, L., 2018. "Life cycle assessment of olive pomace valorisation through pyrolysis," Renewable Energy, Elsevier, vol. 122(C), pages 589-601.
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