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Potential of Technosols Created with Urban By-Products for Rooftop Edible Production

Author

Listed:
  • Baptiste J-P. Grard

    (UMR ECOSYS, INRAE-AgroParisTech, Université Paris-Saclay, 78-850 Thiverval-Grignon, France)

  • Nastaran Manouchehri

    (UMR SayFood, INRAE-AgroParisTech, Université Paris-Saclay, 75005 Paris, France)

  • Christine Aubry

    (UMR SAD-APT, INRAE-AgroParisTech, Université Paris-Saclay, 75231 Paris, France)

  • Nathalie Frascaria-Lacoste

    (Ecologie Systématique Evolution, CNRS-AgroParisTech, Université Paris-Saclay, 91400 Orsay, France)

  • Claire Chenu

    (UMR ECOSYS, INRAE-AgroParisTech, Université Paris-Saclay, 78-850 Thiverval-Grignon, France)

Abstract

Urban agriculture is sprouting throughout the world nowadays. New forms of urban agriculture are observed such as rooftop farming. In the case of low-tech rooftop farming projects, based on recycled urban waste, one of the key issues is the type of substrate used, as it determines the functions and ecosystem services delivered by the green roof. Using a five year experimental trial, we quantified the food production potential of Technosols created only with urban wastes (green waste compost, crushed wood, spent mushroom), as well as the soil fertility and the potential contamination of food products. Regarding food production, our cropping system showed promising results across the five years, in relation with the high fertility of the Technosols. This fertility was maintained, as well as the nutrients stocks after five cropping years. Most of the edible crops had trace metals contents below existing norms for toxic trace metals with nevertheless a concern regarding certain some trace metals such as Zn and Cu. There was no trace metal accumulation in the Technosols over time except for Zn. This study confirmed that constructing Technosols only from urban wastes is a suitable and efficient solution to design rooftops for edible production.

Suggested Citation

  • Baptiste J-P. Grard & Nastaran Manouchehri & Christine Aubry & Nathalie Frascaria-Lacoste & Claire Chenu, 2020. "Potential of Technosols Created with Urban By-Products for Rooftop Edible Production," IJERPH, MDPI, vol. 17(9), pages 1-21, May.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:9:p:3210-:d:354170
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    References listed on IDEAS

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    1. Ina Säumel & Suhana E. Reddy & Thomas Wachtel, 2019. "Edible City Solutions—One Step Further to Foster Social Resilience through Enhanced Socio-Cultural Ecosystem Services in Cities," Sustainability, MDPI, vol. 11(4), pages 1-18, February.
    2. Martina Artmann & Katharina Sartison, 2018. "The Role of Urban Agriculture as a Nature-Based Solution: A Review for Developing a Systemic Assessment Framework," Sustainability, MDPI, vol. 10(6), pages 1-32, June.
    3. Anna Petit-Boix & Defne Apul, 2018. "From Cascade to Bottom-Up Ecosystem Services Model: How Does Social Cohesion Emerge from Urban Agriculture?," Sustainability, MDPI, vol. 10(4), pages 1-13, March.
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