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NaCl accumulation and macronutrient uptake by a melon crop in a closed hydroponic system in relation to water uptake

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  • Neocleous, Damianos
  • Savvas, Dimitrios

Abstract

To optimize nutrient supply in melon (Cucumis melo L.) cultivated in closed-loop hydroponic systems under Mediterranean climatic conditions, the process of salinity build-up has to be better understood. To attain this objective, two experiments were conducted in two cropping seasons (winter–spring and spring–summer) in order to: (i) establish relationships between Na+ and Cl− concentrations in the root zone and uptake concentrations (UC) of Na+ and Cl−, respectively, i.e., Na+/water and Cl−/water uptake ratios, and (ii) test whether macronutrient UC in melon grown in closed hydroponic systems are influenced by the gradual salinity build-up. Three different NaCl concentrations in the irrigation water used to prepare nutrient solutions, i.e., 0.7, 2.5, and 5mM, were applied. The UC of Na+ and Cl− increased over time but at a certain time point in the cropping cycle they converged to a plateau corresponding to the salinity treatment. Exponential relationships between the Na+ and Cl− concentrations in the root zone and the UC of Na+ and Cl−, respectively, were fitted to experimental results in both experiments. However, parameterization of the model with data from the high-transpiration season revealed superiority. The established model parameters corresponded well over the whole melon cultivation cycle and a wide range of climatic conditions. The NaCl-salinity up to the tested level had no significant effect on the UC of macronutrients (i.e., N, P, K, Ca and Mg). The mean UC of Ca and N were higher than those reported under northern-European climatic conditions. The obtained results may be used through on-line operating decision support systems to optimize nutrient supply and minimize salinity impacts in melon grown in closed hydroponic systems when the quality of the irrigation water is sub-optimal.

Suggested Citation

  • Neocleous, Damianos & Savvas, Dimitrios, 2016. "NaCl accumulation and macronutrient uptake by a melon crop in a closed hydroponic system in relation to water uptake," Agricultural Water Management, Elsevier, vol. 165(C), pages 22-32.
    • Handle: RePEc:eee:agiwat:v:165:y:2016:i:c:p:22-32
    DOI: 10.1016/j.agwat.2015.11.013
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    References listed on IDEAS

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    1. Massa, D. & Incrocci, L. & Maggini, R. & Carmassi, G. & Campiotti, C.A. & Pardossi, A., 2010. "Strategies to decrease water drainage and nitrate emission from soilless cultures of greenhouse tomato," Agricultural Water Management, Elsevier, vol. 97(7), pages 971-980, July.
    2. Varlagas, H. & Savvas, D. & Mouzakis, G. & Liotsos, C. & Karapanos, I. & Sigrimis, N., 2010. "Modelling uptake of Na+ and Cl- by tomato in closed-cycle cultivation systems as influenced by irrigation water salinity," Agricultural Water Management, Elsevier, vol. 97(9), pages 1242-1250, September.
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    1. Neocleous, Damianos & Savvas, Dimitrios, 2018. "Modelling Ca2+ accumulation in soilless zucchini crops: Physiological and agronomical responses," Agricultural Water Management, Elsevier, vol. 203(C), pages 197-206.
    2. Massa, Daniele & Magán, Juan José & Montesano, Francesco Fabiano & Tzortzakis, Nikolaos, 2020. "Minimizing water and nutrient losses from soilless cropping in southern Europe," Agricultural Water Management, Elsevier, vol. 241(C).
    3. Yang, Zhi & Kong, Tingting & Xie, Jiarui & Yang, Taiguo & Jiang, Yu & Feng, Ziqi & Zhang, Zhi, 2023. "Appropriate water and fertilizer supply can increase yield by promoting growth while ensuring the soil ecological environment in melon production," Agricultural Water Management, Elsevier, vol. 289(C).
    4. Cedeño, J. & Magán, J.J. & Thompson, R.B. & Fernández, M.D. & Gallardo, M., 2023. "Reducing nutrient loss in drainage from tomato grown in free-draining substrate in greenhouses using dynamic nutrient management," Agricultural Water Management, Elsevier, vol. 287(C).
    5. Neocleous, Damianos & Nikolaou, Georgios & Ntatsi, Georgia & Savvas, Dimitrios, 2021. "Nitrate supply limitations in tomato crops grown in a chloride-amended recirculating nutrient solution," Agricultural Water Management, Elsevier, vol. 258(C).

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