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Nutritional responses of Cordyline fruticosa var. ‘Red Edge’ to fertigation with leachates vs. conventional fertigation: Chloride, nitrogen, phosphorus and sulphate

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  • Plaza, Blanca María
  • Soriano, Francisco
  • Jiménez-Becker, Silvia
  • Lao, María Teresa

Abstract

In closed soilless growing systems, leachates are used for the fertigation of the same culture, which is known as recirculation. This technology has been widely studied. It constitutes an environmentally friendly system because it prevents the leaching of chemicals into the environment, contributing to the sustainability of the horticultural sector. Nevertheless, the use of low quality water makes its application difficult. Moreover, as salinity increases in leachates, specific ions may become toxic or interfere with the uptake of other nutrients. In these situations, the sequential reuse of drainage waters to grow successively more salt tolerant crops, a practice which is known as Serial Biological Concentration or Integrated Farm Drainage Management, may be proposed. The aim of this trial was to assess the nutritional responses of Cordyline fruticosa var. ‘Red Edge’ (a semi-tolerant crop) fertigated with leachates from Citrullus lanatus cultivated on rockwool, compared with to conventional fertigation. There were 4 treatments: T1 (nutritionally balanced control or standard nutrient solution, with an electrical conductivity (EC) of 2.5dSm−1),T2 (saline control; T2 diluted to an EC of 1.5dSm−1; afterwards, NaCl was added to achieve 2.5dSm−1),T3 (pure leachates from the hydroponic culture of C. lanatus) and T4 (diluted leachates, T3 diluted with irrigation water to 2.5dSm−1). Dry weight (DW) and Cl−, N, P and SO42− concentrations as well as the extraction of photosynthetic organs (leaves), conductive organs (stems and petioles) and absorption organs (roots) were measured. The results obtained confirmed that diluted leachates can be employed for the fertigation of C. fruticosa ‘Red Edge’, because there were no effects on the plants DW, and no significant differences in Cl−, N, P or SO42− concentrations in leaves with respect to the nutritionally balanced control.

Suggested Citation

  • Plaza, Blanca María & Soriano, Francisco & Jiménez-Becker, Silvia & Lao, María Teresa, 2016. "Nutritional responses of Cordyline fruticosa var. ‘Red Edge’ to fertigation with leachates vs. conventional fertigation: Chloride, nitrogen, phosphorus and sulphate," Agricultural Water Management, Elsevier, vol. 173(C), pages 61-66.
    • Handle: RePEc:eee:agiwat:v:173:y:2016:i:c:p:61-66
    DOI: 10.1016/j.agwat.2016.04.031
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    References listed on IDEAS

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    1. Chen, Xiulong & Kang, Yaohu & Wan, Shuqin & Chu, Linlin & Li, Xiaobin, 2015. "Chinese rose (Rosa chinensis) cultivation in Bohai Bay, China, using an improved drip irrigation method to reclaim heavy coastal saline soils," Agricultural Water Management, Elsevier, vol. 158(C), pages 99-111.
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    Cited by:

    1. Pedro Garcia-Caparros & Juana Isabel Contreras & Rafael Baeza & Maria Luz Segura & Maria Teresa Lao, 2017. "Integral Management of Irrigation Water in Intensive Horticultural Systems of Almería," Sustainability, MDPI, vol. 9(12), pages 1-21, December.
    2. Fernando Paniagua & Blanca María Plaza & Alfonso Llanderal & Pedro García-Caparrós & María Teresa Lao, 2023. "Sustainable Strategies Based on Reused Leachates and Hydrogen Peroxide Supply to Fertigate Cordyline fruticosa var. ‘Red Edge’ Plants," Agriculture, MDPI, vol. 13(7), pages 1-19, June.

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