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Soil chemical properties, leaf mineral status and crop production in a lemon tree orchard irrigated with two types of wastewater

  • Pedrero, Francisco
  • Allende, Ana
  • Gil, María I.
  • Alarcón, Juan J.
Registered author(s):

    The effects of applying different types of treated wastewater on citrus trees were studied in Murcia, in the south-east of Spain. Two treatments with wastewater effluents of different quality were applied for three consecutive years. In the first case, the wastewater received a secondary treatment (conventional activated sludge). In the second case, the irrigation water was a mix of well water and wastewater from a tertiary treatment plant (conventional activated sludge with ultraviolet tertiary treatment). The characteristics of the tertiary treated wastewater make it better for irrigation than the secondary treated wastewater. It was considered that high salinity, Cl and B concentration could be the main restrictions associated with treated wastewater irrigation in both cases, although leaf toxicity levels were not observed. The soil nitrate concentration increased over the experimental time period in both water irrigation treatments. The production was affected by the wastewater quality and the total crop yield was lower in the plots irrigated with secondary treated wastewater. However, in these plots, the fruit-quality indexes such as external colour, weight, peel thickness, firmness, soluble solids, pH, total acidity and maturity index were significantly better than those observed in the plots irrigated with tertiary treatment. The soil microbiological analysis revealed an absence of faecal coliforms, Escherichia coli and helminth eggs in the experimental plots irrigated with tertiary treated wastewater, but with secondary treated wastewater the soil accumulation of faecal coliforms exceeded health standards. In both cases, there was an absence of microbiological contamination on fruits.

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    File URL: http://www.sciencedirect.com/science/article/pii/S0378377412000613
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    Article provided by Elsevier in its journal Agricultural Water Management.

    Volume (Year): 109 (2012)
    Issue (Month): C ()
    Pages: 54-60

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    Handle: RePEc:eee:agiwat:v:109:y:2012:i:c:p:54-60
    DOI: 10.1016/j.agwat.2012.02.006
    Contact details of provider: Web page: http://www.elsevier.com/locate/agwat

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    1. Pedrero, Francisco & Kalavrouziotis, Ioannis & Alarcón, Juan José & Koukoulakis, Prodromos & Asano, Takashi, 2010. "Use of treated municipal wastewater in irrigated agriculture--Review of some practices in Spain and Greece," Agricultural Water Management, Elsevier, vol. 97(9), pages 1233-1241, September.
    2. Intrigliolo, D.S. & Nicolas, E. & Bonet, L. & Ferrer, P. & Alarcón, J.J. & Bartual, J., 2011. "Water relations of field grown Pomegranate trees (Punica granatum) under different drip irrigation regimes," Agricultural Water Management, Elsevier, vol. 98(4), pages 691-696, February.
    3. Garcia-Orellana, Y. & Ruiz-Sanchez, M.C. & Alarcon, J.J. & Conejero, W. & Ortuno, M.F. & Nicolas, E. & Torrecillas, A., 2007. "Preliminary assessment of the feasibility of using maximum daily trunk shrinkage for irrigation scheduling in lemon trees," Agricultural Water Management, Elsevier, vol. 89(1-2), pages 167-171, April.
    4. Pereira, B.F.F. & He, Z.L. & Stoffella, P.J. & Melfi, A.J., 2011. "Reclaimed wastewater: Effects on citrus nutrition," Agricultural Water Management, Elsevier, vol. 98(12), pages 1828-1833, October.
    5. Alarcon, J.J. & Ortuno, M.F. & Nicolas, E. & Navarro, A. & Torrecillas, A., 2006. "Improving water-use efficiency of young lemon trees by shading with aluminised-plastic nets," Agricultural Water Management, Elsevier, vol. 82(3), pages 387-398, April.
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