Agricultural valorization of domestic sewage sludge: Impact on growth, photosynthesis, nutrition and toxic metal accumulation in Medicago sativa

Baioui, Raoudha;Ghnaya, Tahar;Wali, Mariem;Zaier, Hanen;Abdelly, Chedly;et.al.
(2017) Agrochimica : rivista internazionale di chimica vegetale, pedologia e fertilizzazione del suolo — Vol. 61, n° 1, p. 56-74 (2017)

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Authors
  • Baioui, Raoudha
    Author
  • Ghnaya, Tahar
    Author
  • Wali, Mariem
    Author
  • Zaier, Hanen
    Author
  • Lutts, StanleyUCLouvain
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  • Abdelly, Chedly
    Author
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Abstract
One of the best alternative disposals of sludge sewage is through the soil-plant system as a fertilizer. Sludge sewage is both an environmentally and economically sound way of recycling nutrients which are beneficial for plant nutrition. A field experiment using four doses (100, 200, 300 and 400 t ha-1) of an urban sludge was carried out to study the effect of its application on growth, photosynthesis and ion accumulation in Medicago sativa (an important forage crop species) in order to check its usefulness as a safe fertilizer. Results showed a positive effect of the amendment on growth, CO2assimilation, stomatal conductance and transpiration rate as well as Ca, Mg and Fe acquisition, especially at 2001 ha-1. For metals accumulation, data showed that up to 300 t ha-1, sludge presented no risk of contamination. Hence, we suggest that, up to 3001 ha-1, this amendment is suitable for agriculture.
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Baioui, R., Ghnaya, T., Wali, M., Zaier, H., Ghabriche, R., Mnasri, M., Lutts, S., Zorrig, W., & Abdelly, C. (2017). Agricultural valorization of domestic sewage sludge: Impact on growth, photosynthesis, nutrition and toxic metal accumulation in Medicago sativa. Agrochimica : rivista internazionale di chimica vegetale, pedologia e fertilizzazione del suolo, 61(1), 56-74. https://doi.org/10.12871/0021857201715 (Original work published 2017)