Aquaponics Production of Wheatgrass (Triticum aestivum L.) in Different Horticultural Substrates with African Catfish (Clarias gariepinus) in Northern Germany

Lu Xu, Christopher J. Ziethen, Samuel Appelbaum, Harry W. Palm, Ulrich Knaus

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In the present study, wheatgrass (Triticum aestivum L.) was chosen since fish effluents could be adequate to support its optimal growth. Wheatgrass was irrigated by water from African catfish (Clarias gariepinus) production under two stocking densities, namely extensive aquaculture unit (EAU) and intensive aquaculture unit (IAU), and tap water mixed with fertilizer (Control) in combination with three horticultural substrates: 100% coconut fibers (C), 70% coconut fibers + 30% perlite (CP), and 50% perlite + 50% vermiculite (PV) in an ebb-and-flow system. Different plant growth parameters, including nutrient contents, were evaluated and discussed. The results showed that regarding irrigation water, shoot dry mass was significantly higher in fish water groups. The root–shoot ratio was significantly higher in Control. The highest SPAD index was discovered in IAU. Regarding substrates, the root–shoot ratio was significantly low in C. Vitamin and mineral production reached mainly the highest concentrations in the combination of fish water with different substrates. In conclusion, irrigation water from IAU and coconut fibers were sufficient for optimal wheatgrass growth; meanwhile, IAU effluents showed a positive influence on vitamin production. Our study demonstrates the potential of aquaponics as a more sustainable way of producing superfoods.

Original languageEnglish
Pages (from-to)1076-1094
Number of pages19
JournalAgriEngineering
Volume4
Issue number4
DOIs
StatePublished - 1 Dec 2022

Keywords

  • coconut fibers
  • ebb-and-flow system
  • perlite
  • plant growth
  • plant nutrients
  • vermiculite
  • vitamins

ASJC Scopus subject areas

  • Horticulture
  • Engineering (miscellaneous)
  • Food Science
  • Agronomy and Crop Science

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