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Comparison of Agronomic Parameters and Nutritional Composition on Red and Green Amaranth Species Grown in Open Field Versus Greenhouse Environment

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  • Gudani Millicent Managa

    (Department of Agriculture and Animal Health, University of South Africa, Science Campus, Florida, Johannesburg 1709, South Africa)

  • Lufuno Ethel Nemadodzi

    (Department of Agriculture and Animal Health, University of South Africa, Science Campus, Florida, Johannesburg 1709, South Africa)

Abstract

Previously, researchers have not paid attention to indigenous African leafy vegetables such as nightshade and kale, however, amaranth species have recently gained popularity due to their adaptability to various climatic conditions and their cultivation in both open fields and hydroponics. Amaranth species are ranked among the underutilized leafy vegetables with medicinal properties, economic values, nutritional and health benefits. This study aimed to compare the growth parameters and nutritional composition of two consumed red ( Amaranthus Cruentus L.) and green ( Amaranthus Graecizans L.) amaranth species in South Africa, cultivated in an open field versus a greenhouse. The findings showed a high chlorophyll content and large leaf area under open field conditions on red and green species. The number of leaves and stem height were higher in the greenhouse cultivation system. In open field cultivation, minerals such as calcium, magnesium, phosphorus, iron, zinc, aluminium, copper and manganese for both species were significantly higher whilst potassium, sodium, boron, sulphur were significantly higher in the greenhouse production. The sufficient total nitrogen and ash were recorded in the open field production, and no significant difference was observed between the open field and greenhouse on moisture and ash content of A. Cruentus . In conclusion, A. Cruentus and A. Graecizansn grown in an open field had higher proximate and mineral composition over the greenhouse cultivation system.

Suggested Citation

  • Gudani Millicent Managa & Lufuno Ethel Nemadodzi, 2023. "Comparison of Agronomic Parameters and Nutritional Composition on Red and Green Amaranth Species Grown in Open Field Versus Greenhouse Environment," Agriculture, MDPI, vol. 13(3), pages 1-15, March.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:3:p:685-:d:1097851
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    References listed on IDEAS

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