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Changes in key photosynthetic parameters of olive trees following soil tillage and wastewater irrigation, modified olive oil quality

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  • Tekaya, Meriem
  • Mechri, Beligh
  • Dabbaghi, Olfa
  • Mahjoub, Zoubeir
  • Laamari, Salwa
  • Chihaoui, Badreddine
  • Boujnah, Dalenda
  • Hammami, Mohamed
  • Chehab, Hechmi

Abstract

The use of wastewater (WW) provides a reliable source of water and nutrients for crop production. Soil tillage is one of the key soil management practices in agricultural land use. In the present study, we studied the effects of these two agricultural practices on key physiological parameters of olive trees and on olive oil quality. The experiment was carried out on mature olive trees (Olea europaea L. cv. Chemlali). Two tillage practices treatments (Trees grown in Tilled soil: TTS; and Trees grown in No-tilled soil: TNTS) were combined with two irrigation treatments (Trees irrigated with WW: IT; and Trees grown under rainfed condition: TRC) during two successive years (2013 and 2014). Statistical analyses demonstrated that the factor “soil tillage” was more efficient in improving photosynthetic parameters of olive trees than WW irrigation. The combination of soil tillage with WW irrigation improved significantly leaf chlorophyll fluorescence parameters, stomatal conductance, transpiration and chlorophyll content, which closely associated with an increase of photosynthetic rate, and a decrease of stress metabolites (leaf phenolic compounds and carbohydrates). On the other hand, a decrease of key photosynthetic parameters and an accumulation of stress metabolites in leaves were observed when combining rainfed condition and No-tilled soil. WW irrigation affected negatively the oxidative stability and nutritional value of olive oil, especially by decreasing the contents of antioxidant compounds (total phenols and pigments) and the levels of MUFA, C18:1, C18:3 and elevating SFA and PUFA contents. However, soil tillage combined with TRC improved oil stability to oxidation and its nutritional value by increasing the contents of antioxidant compounds and the levels of MUFA and C18:1, as well as C18:1/C18:2 and MUFA/PUFA ratios.

Suggested Citation

  • Tekaya, Meriem & Mechri, Beligh & Dabbaghi, Olfa & Mahjoub, Zoubeir & Laamari, Salwa & Chihaoui, Badreddine & Boujnah, Dalenda & Hammami, Mohamed & Chehab, Hechmi, 2016. "Changes in key photosynthetic parameters of olive trees following soil tillage and wastewater irrigation, modified olive oil quality," Agricultural Water Management, Elsevier, vol. 178(C), pages 180-188.
    • Handle: RePEc:eee:agiwat:v:178:y:2016:i:c:p:180-188
    DOI: 10.1016/j.agwat.2016.09.023
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    1. Bedbabis, Saida & Trigui, Dhouha & Ben Ahmed, Chedlia & Clodoveo, Maria Lisa & Camposeo, Salvatore & Vivaldi, Gaetano Alessandro & Ben Rouina, Béchir, 2015. "Long-terms effects of irrigation with treated municipal wastewater on soil, yield and olive oil quality," Agricultural Water Management, Elsevier, vol. 160(C), pages 14-21.
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    3. Pedrero, Francisco & Grattan, S.R. & Ben-Gal, Alon & Vivaldi, Gaetano Alessandro, 2020. "Opportunities for expanding the use of wastewaters for irrigation of olives," Agricultural Water Management, Elsevier, vol. 241(C).
    4. Mahmoud F. Seleiman & Nasser Al-Suhaibani & Salah El-Hendawy & Kamel Abdella & Majed Alotaibi & Ali Alderfasi, 2021. "Impacts of Long- and Short-Term of Irrigation with Treated Wastewater and Synthetic Fertilizers on the Growth, Biomass, Heavy Metal Content, and Energy Traits of Three Potential Bioenergy Crops in Ari," Energies, MDPI, vol. 14(11), pages 1-22, May.
    5. Ramos, Tiago B. & Darouich, Hanaa & Šimůnek, Jiří & Gonçalves, Maria C. & Martins, José C., 2019. "Soil salinization in very high-density olive orchards grown in southern Portugal: Current risks and possible trends," Agricultural Water Management, Elsevier, vol. 217(C), pages 265-281.
    6. José Rato-Nunes & José Telo-da-Gama & David Peña & Luís Loures & Angel Albaran & Damian Fernández-Rodríguez & Luis Vicente & António López-Piñeiro, 2024. "Hedgerow Olive Orchards versus Traditional Olive Orchards: Impact on Selected Soil Chemical Properties," Agriculture, MDPI, vol. 14(2), pages 1-19, February.
    7. Chehab, Hechmi & Tekaya, Meriem & Hajlaoui, Hichem & Abdelhamid, Sofiane & Gouiaa, Mohamed & Sfina, Hanene & Chihaoui, Badreddine & Boujnah, Dalenda & Mechri, Beligh, 2020. "Complementary irrigation with saline water and soil organic amendments modified soil salinity, leaf Na+, productivity and oil phenols of olive trees (cv. Chemlali) grown under semiarid conditions," Agricultural Water Management, Elsevier, vol. 237(C).
    8. Sdiri, Wiem & Dabbou, Samia & Chehab, Hechmi & Selvaggini, Roberto & Servili, Maurizio & Di Bella, Giuseppa & Mansour, Hedi Ben, 2020. "Quality characteristics and chemical evaluation of Chemlali olive oil produced under dairy wastewater irrigation," Agricultural Water Management, Elsevier, vol. 236(C).
    9. Alan Alvarez-Holguin & Gabriel Sosa-Perez & Omar Castor Ponce-Garcia & Carlos Rene Lara-Macias & Federico Villarreal-Guerrero & Carlos Gustavo Monzon-Burgos & Jesus Manuel Ochoa-Rivero, 2022. "The Impact of Treated Wastewater Irrigation on the Metabolism of Barley Grown in Arid and Semi-Arid Regions," IJERPH, MDPI, vol. 19(4), pages 1-16, February.
    10. Konstantina Fotia & George Nanos & Pantelis Barouchas & Markos Giannelos & Aikaterini Linardi & Aikaterini Vallianatou & Paraskevi Mpeza & Ioannis Tsirogiannis, 2022. "Growth Development, Physiological Status and Water Footprint Assessment of Nursery Young Olive Trees ( Olea europaea L. ‘Konservolea’) Irrigated with Urban Treated Wastewater," Resources, MDPI, vol. 11(5), pages 1-14, April.

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