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Sustainable Soilless Recirculating Hydroponics for Productive Use of Marginal Lands: A South African Context

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The Marginal Soils of Africa

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Abstract

Soilless recirculating hydroponic systems (those in which the nutrient solution is continuously recirculated and reused into the system) are well known for their potential to maximize crop production with minimum inputs of fertilizer and water, resulting in improved yields and quality of fresh produce, as well as increased farmer’s profitability and environmental preservation. The most implemented recirculating hydroponic systems in South Africa include the gravel and nutrient film, ebb-and-flow, and deep-water-culture techniques. Appropriate management and maintenance of these systems are crucial for increased crop productivity and water use efficiency. This is particularly relevant in South Africa for being a food-insecure and water-scarce country. This chapter highlights important production factors in recirculating hydroponics, typical crop yields, and water use efficiency obtained under South African conditions while emphasizing potential focus areas for research to improve the profitability and sustainability of crop production in soilless recirculating hydroponic systems.

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Acknowledgements

The authors would like to acknowledge the Agricultural Research Council and the Water Research Commission through the implementation of project C2019/2020-00229 for supporting this contribution.

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Authors and Affiliations

  1. Agricultural Research Council-Vegetable, Industrial and Medicinal Plants, Pretoria, South Africa

    Nadia Alcina Araya, Makgoka Given Moremi, Motiki M. Mofokeng, Mantwampe Johleen Malaka, Hintsa Tesfamicael Araya & Beverly Mampholo

  2. Agricultural Research Council, Natural Resources and Engineering, Pretoria, South Africa

    Nadia Alcina Araya

  3. School of Agricultural Sciences, University of Mpumalanga, Mbombela, South Africa

    Salmina Mokgehle

  4. Agricultural Research Council, Infruitec-Nietvoorbij, Stellenbosch, South Africa

    Manaka Makgato

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  1. Nadia Alcina Araya
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  2. Makgoka Given Moremi
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Correspondence to Nadia Alcina Araya .

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  1. Natural Resources and Engineering, Agricultural Research Council, Pretoria, South Africa

    Adornis Dakarai Nciizah

  2. Natural Resources and Engineering, Agricultural Research Council, Pretoria, South Africa

    Ashira Roopnarain

  3. Natural Resources and Engineering, Agricultural Research Council, Pretoria, South Africa

    Busiswa Ndaba

  4. Dept. of Agriculture and Animal Health, University of South Africa, Roodepoort, South Africa

    Mashapa Elvis Malobane

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Araya, N.A. et al. (2024). Sustainable Soilless Recirculating Hydroponics for Productive Use of Marginal Lands: A South African Context. In: Nciizah, A.D., Roopnarain, A., Ndaba, B., Malobane, M.E. (eds) The Marginal Soils of Africa. Springer, Cham. https://doi.org/10.1007/978-3-031-55185-7_15

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