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Saline irrigation scheduling for potted geranium based on soil electrical conductivity and moisture sensors

Author

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  • Valdés, R.
  • Ochoa, J.
  • Franco, J.A.
  • Sánchez-Blanco, M.J.
  • Bañón, S.

Abstract

The scarcity of fresh water and the need to improve environmental management has led to saline water being used for agricultural purposes, and this, in turn, has to be managed in such a way that it minimizes any damage it may cause. The use of soil moisture and electrical conductivity (EC) sensors can play an important role in this process. This work studies whether, by setting different levels of pore water EC (ECPW) in a programmable automatic irrigation system connected to GS3-Decagon sensors, it is possible to create different saline conditions for cultivating geranium in pots irrigated with reclaimed wastewater of 5.5dSm−1 and fresh water of 1.6dSm−1 (for flushing). Five treatments were studied: the control (using fresh water) and four saline treatments programmed to provide flushing with fresh water every time that a threshold of ECPW was exceeded: 5 (T5), 5.5 (T5.5), 6 (T6) and 6.5 (T6.5) dSm−1. The saline conditions that the plants could support were evaluated in terms of growth, chlorophyll content, photosynthesis, stomatal conductance, leaf saline ion concentrations, water consumption and drainage. At the end of the experiment, the plants of T5 showed a good ornamental appearance although they had consumed 32% less total applied water than the control. The plants of the other saline treatments were excessively small and showed poor development. The automatic irrigation system using the GS3 was capable of maintaining different conditions of salinity up to 5.5dSm−1 of ECPW.

Suggested Citation

  • Valdés, R. & Ochoa, J. & Franco, J.A. & Sánchez-Blanco, M.J. & Bañón, S., 2015. "Saline irrigation scheduling for potted geranium based on soil electrical conductivity and moisture sensors," Agricultural Water Management, Elsevier, vol. 149(C), pages 123-130.
    • Handle: RePEc:eee:agiwat:v:149:y:2015:i:c:p:123-130
    DOI: 10.1016/j.agwat.2014.11.003
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    References listed on IDEAS

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    1. Katerji, N. & van Hoorn, J. W. & Hamdy, A. & Mastrorilli, M., 2004. "Comparison of corn yield response to plant water stress caused by salinity and by drought," Agricultural Water Management, Elsevier, vol. 65(2), pages 95-101, March.
    2. Chartzoulakis, K. S. & Loupassaki, M. H., 1997. "Effects of NaCl salinity on germination, growth, gas exchange and yield of greenhouse eggplant," Agricultural Water Management, Elsevier, vol. 32(3), pages 215-225, March.
    3. Muñoz-Carpena, R. & Ritter, A. & Bosch, D.D. & Schaffer, B. & Potter, T.L., 2008. "Summer cover crop impacts on soil percolation and nitrogen leaching from a winter corn field," Agricultural Water Management, Elsevier, vol. 95(6), pages 633-644, June.
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    Cited by:

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    2. Ben Hassena, Ameni & Zouari, Mohamed & Trabelsi, Lina & Decou, Raphaël & Ben Amar, Fathi & Chaari, Anissa & Soua, Nabil & Labrousse, Pascal & Khabou, Wahid & Zouari, Nacim, 2021. "Potential effects of arbuscular mycorrhizal fungi in mitigating the salinity of treated wastewater in young olive plants (Olea europaea L. cv. Chetoui)," Agricultural Water Management, Elsevier, vol. 245(C).
    3. Sebastián Bañón & Jesús Ochoa & Daniel Bañón & María Fernanda Ortuño & María Jesús Sánchez-Blanco, 2020. "Assessment of the Combined Effect of Temperature and Salinity on the Outputs of Soil Dielectric Sensors in Coconut Fiber," Sustainability, MDPI, vol. 12(16), pages 1-14, August.
    4. Incrocci, Luca & Marzialetti, Paolo & Incrocci, Giorgio & Di Vita, Andrea & Balendonck, Jos & Bibbiani, Carlo & Spagnol, Serafino & Pardossi, Alberto, 2019. "Sensor-based management of container nursery crops irrigated with fresh or saline water," Agricultural Water Management, Elsevier, vol. 213(C), pages 49-61.
    5. Montesano, Francesco Fabiano & van Iersel, Marc W. & Boari, Francesca & Cantore, Vito & D’Amato, Giulio & Parente, Angelo, 2018. "Sensor-based irrigation management of soilless basil using a new smart irrigation system: Effects of set-point on plant physiological responses and crop performance," Agricultural Water Management, Elsevier, vol. 203(C), pages 20-29.
    6. Gulom Bekmirzaev & Baghdad Ouddane & Jose Beltrao & Yoshiharu Fujii, 2020. "The Impact of Salt Concentration on the Mineral Nutrition of Tetragonia tetragonioides," Agriculture, MDPI, vol. 10(6), pages 1-10, June.

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