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Hydroponic production of vegetable Amaranth (Amaranthus cruentus) for improving nutritional security and economic viability in Kenya

Published online by Cambridge University Press:  09 January 2017

Marcia M. Croft ,
Steven G. Hallett  and
Maria I. Marshall
Marcia M. Croft
Affiliation:
Department of Horticulture and Landscape Architecture, Purdue University, 625 Agriculture Mall Dr, West Lafayette, Indiana 47907, USA.
Steven G. Hallett*
Affiliation:
Department of Horticulture and Landscape Architecture, Purdue University, 625 Agriculture Mall Dr, West Lafayette, Indiana 47907, USA.
Maria I. Marshall
Affiliation:
Department of Agricultural Economics, Purdue University, 403 W State St, West Lafayette, Indiana 47907, USA.
*
*Corresponding author: halletts@purdue.edu
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Abstract

This study used a multidisciplinary approach to evaluate the potential for hydroponic production of vegetable amaranth (Amaranthus cruentus) in Kenya. Hydroponic systems have potential for increased efficiency in water and land use, but their potential has not been critically evaluated in many developing countries. To address this gap in knowledge, this study assessed the nutritional density and economic viability of hydroponic systems built from local materials. Specifically, vegetable amaranth was grown hydroponically and evaluated for increased nutritional density of key micronutrients. Manipulation of the nutrient solution used in hydroponic systems changed the bioaccumulation of zinc, iron and carotenoids, which are three of the most common micronutrients lacking in Kenyan diets. Economic viability was assessed with a benefit-cost analysis that compared three different hydroponic systems to soil-based production and purchasing vegetables from local markets. This analysis showed that none of the hydroponic systems were profitable under current conditions, but sensitivity analyses revealed certain scenarios where they could become so. Overall, hydroponic production has the potential to create nutrient-dense crops with high levels of zinc, iron, or carotenoids. However, hydroponic systems may be better suited to crops of higher value than amaranth, areas where soil-based production is not an option, or regions where vegetable markets are not available.

Keywords

hydroponicsamaranthnutritional securitybenefit-cost analysis
Type
Research Papers
Information
Renewable Agriculture and Food Systems , Volume 32 , Issue 6 , December 2017 , pp. 552 - 561
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Copyright
Copyright © Cambridge University Press 2017 

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