Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace

Nerokremmydo of Zakynthos, a Greek landrace of sweet onion producing a large bulb, was experimentally cultivated in a glasshouse using aeroponic, floating, nutrient film technique, and aggregate systems, i.e., AER, FL, NFT, and AG, respectively. The aim of the experiment was to compare the effects o...

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Autores principales:	Christos Mouroutoglou, Anastasios Kotsiras, Georgia Ntatsi, Dimitrios Savvas
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	soilless culture nutrient uptake sweet onion nerokremmydo aeroponic floating Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/5ffca4861e3347049d2787665cf005ab
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spelling	oai:doaj.org-article:5ffca4861e3347049d2787665cf005ab2021-11-25T17:47:04ZImpact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace10.3390/horticulturae71104322311-7524https://doaj.org/article/5ffca4861e3347049d2787665cf005ab2021-10-01T00:00:00Zhttps://www.mdpi.com/2311-7524/7/11/432https://doaj.org/toc/2311-7524Nerokremmydo of Zakynthos, a Greek landrace of sweet onion producing a large bulb, was experimentally cultivated in a glasshouse using aeroponic, floating, nutrient film technique, and aggregate systems, i.e., AER, FL, NFT, and AG, respectively. The aim of the experiment was to compare the effects of these soilless culture systems (SCSs) on plant characteristics, including fresh and dry weight, bulb geometry, water use efficiency, tissue macronutrient concentrations, and uptake concentrations (UC), i.e., uptake ratios between macronutrients and water, during the main growth, bulbing, and maturation stages, i.e., 31, 62, and 95 days after transplanting. The plants grown in FL and AG yielded 7.87 and 7.57 kg m<sup>−2</sup>, respectively, followed by those grown in AER (6.22 kg m<sup>−2</sup>), while those grown in NFT produced the lowest yield (5.20 kg m<sup>−2</sup>). The volume of nutrient solution (NS) consumed per plant averaged 16.87 L, with NFT plants recording the least consumption. The SCS affected growth rate of new roots and “root mat” density that led to corresponding nutrient uptake differences. In NFT, reduced nutrient uptake was accompanied by reduced water consumption. The SCS and growth stage strongly affected tissue N, P, K, Ca, Mg, and S mineral concentrations and the respective UC. The UC of N and Κ followed a decreasing trend, while that of Mg decreased only until bulbing, and the UC of the remainder of the macronutrients increased slightly during the cropping period. The UC can be used as a sound basis to establish NS recommendations for cultivation of this sweet onion variety in closed SCSs.Christos MouroutoglouAnastasios KotsirasGeorgia NtatsiDimitrios SavvasMDPI AGarticlesoilless culturenutrient uptakesweet onionnerokremmydoaeroponicfloatingPlant cultureSB1-1110ENHorticulturae, Vol 7, Iss 432, p 432 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	soilless culture nutrient uptake sweet onion nerokremmydo aeroponic floating Plant culture SB1-1110
spellingShingle	soilless culture nutrient uptake sweet onion nerokremmydo aeroponic floating Plant culture SB1-1110 Christos Mouroutoglou Anastasios Kotsiras Georgia Ntatsi Dimitrios Savvas Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace
description	Nerokremmydo of Zakynthos, a Greek landrace of sweet onion producing a large bulb, was experimentally cultivated in a glasshouse using aeroponic, floating, nutrient film technique, and aggregate systems, i.e., AER, FL, NFT, and AG, respectively. The aim of the experiment was to compare the effects of these soilless culture systems (SCSs) on plant characteristics, including fresh and dry weight, bulb geometry, water use efficiency, tissue macronutrient concentrations, and uptake concentrations (UC), i.e., uptake ratios between macronutrients and water, during the main growth, bulbing, and maturation stages, i.e., 31, 62, and 95 days after transplanting. The plants grown in FL and AG yielded 7.87 and 7.57 kg m<sup>−2</sup>, respectively, followed by those grown in AER (6.22 kg m<sup>−2</sup>), while those grown in NFT produced the lowest yield (5.20 kg m<sup>−2</sup>). The volume of nutrient solution (NS) consumed per plant averaged 16.87 L, with NFT plants recording the least consumption. The SCS affected growth rate of new roots and “root mat” density that led to corresponding nutrient uptake differences. In NFT, reduced nutrient uptake was accompanied by reduced water consumption. The SCS and growth stage strongly affected tissue N, P, K, Ca, Mg, and S mineral concentrations and the respective UC. The UC of N and Κ followed a decreasing trend, while that of Mg decreased only until bulbing, and the UC of the remainder of the macronutrients increased slightly during the cropping period. The UC can be used as a sound basis to establish NS recommendations for cultivation of this sweet onion variety in closed SCSs.
format	article
author	Christos Mouroutoglou Anastasios Kotsiras Georgia Ntatsi Dimitrios Savvas
author_facet	Christos Mouroutoglou Anastasios Kotsiras Georgia Ntatsi Dimitrios Savvas
author_sort	Christos Mouroutoglou
title	Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace
title_short	Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace
title_full	Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace
title_fullStr	Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace
title_full_unstemmed	Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace
title_sort	impact of the hydroponic cropping system on growth, yield, and nutrition of a greek sweet onion (<i>allium cepa</i> l.) landrace
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5ffca4861e3347049d2787665cf005ab
work_keys_str_mv	AT christosmouroutoglou impactofthehydroponiccroppingsystemongrowthyieldandnutritionofagreeksweetonionialliumcepaillandrace AT anastasioskotsiras impactofthehydroponiccroppingsystemongrowthyieldandnutritionofagreeksweetonionialliumcepaillandrace AT georgiantatsi impactofthehydroponiccroppingsystemongrowthyieldandnutritionofagreeksweetonionialliumcepaillandrace AT dimitriossavvas impactofthehydroponiccroppingsystemongrowthyieldandnutritionofagreeksweetonionialliumcepaillandrace
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Impact of the Hydroponic Cropping System on Growth, Yield, and Nutrition of a Greek Sweet Onion (<i>Allium cepa</i> L.) Landrace

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