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Prof. Johannes Max
Hochschule Weihenstephan-Triesdorf

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0 Horticulture
0 Plant Nutrition
0 Soil Science
0 Resource use efficiency
0 tropics and subtropics

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Journal article
Published: 21 July 2021 in Horticulturae
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In a cascade hydroponic system, the used nutrient solution drained from a primary crop is directed to a secondary crop, enhancing resource-use efficiency while minimizing waste. Nevertheless, the inevitably increased EC of the drainage solution requires salinity-tolerant crops. The present study explored the salinity-tolerance thresholds of basil to evaluate its potential use as a secondary crop in a cascade system. Two distinct but complemented approaches were used; the first experiment examined basil response to increased levels of salinity (5, 10 and 15 dS m−1, compared with 2 dS m−1 of control) to identify the limits, and the second experiment employed a cascade system with cucumber as a primary crop to monitor basil responses to the drainage solution of 3.2 dS m−1. Growth, ascorbate content, nutrient concentration, and total amino acid concentration and profile were determined in both experiments. Various aspects of basil growth and biochemical performance collectively indicated the 5 dS m−1 salinity level as the upper limit/threshold of tolerance to stress. Higher salinity levels considerably suppressed fresh weight production, though the total concentration of amino acids showed a sevenfold increase under 15 dS m−1 and 4.5-fold under 5 and 10 dS m−1 compared to the control. The performance of basil in the cascade system was subject to a compromise between a reduction of fresh produce and an increase of total amino acids and ascorbate content. This outcome indicated that basil performed well under the conditions and the system employed in the present study, and might be a good candidate for use as a secondary crop in cascade-hydroponics systems.

ACS Style

Denisa Avdouli; Johannes Max; Nikolaos Katsoulas; Efi Levizou. Basil as Secondary Crop in Cascade Hydroponics: Exploring Salinity Tolerance Limits in Terms of Growth, Amino Acid Profile, and Nutrient Composition. Horticulturae 2021, 7, 203 .

AMA Style

Denisa Avdouli, Johannes Max, Nikolaos Katsoulas, Efi Levizou. Basil as Secondary Crop in Cascade Hydroponics: Exploring Salinity Tolerance Limits in Terms of Growth, Amino Acid Profile, and Nutrient Composition. Horticulturae. 2021; 7 (8):203.

Chicago/Turabian Style

Denisa Avdouli; Johannes Max; Nikolaos Katsoulas; Efi Levizou. 2021. "Basil as Secondary Crop in Cascade Hydroponics: Exploring Salinity Tolerance Limits in Terms of Growth, Amino Acid Profile, and Nutrient Composition." Horticulturae 7, no. 8: 203.

Journal article
Published: 13 November 2020 in Horticulturae
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The circular economy in agriculture aims to reduce waste while also making best use of residues by using economically viable processes and procedures to increase their value. In this study a two-level cascade cultivation system was set up under greenhouse conditions. The research was focused on the identification of crop species as secondary crops and the development/iterative optimization of cultivation practices. For this purpose, different crop-combinations with a primary and different secondary crops were investigated using different system-layouts. Measurements were carried out during two cultivation periods. During the 1st Period a combination of cucumber (Cucumis sativus) as primary crop, with rosemary (Rosmarinus officinalis), basil (Ocimum basilicum), and peppermint (Mentha piperita) as secondary crops, was evaluated. In the 2nd Period the drainage of tomato (Solanum lycopersicum) plants was re-used to irrigate spearmint (Mentha spicata), dill (Anethum graveolens), celery (Apium graveolens) and parsley (Petroselinum crispum) plants. In both periods, different fertigation management strategies based on the drainage solution of the primary crop were employed. The use of the cascade hydroponic system improved both crop water and nutrient use efficiency. Notably, the NO3 disposal was about 40% less as compared to a monoculture. Average fresh water consumption of secondary crop plants irrigated with diluted drainage solution was reduced by 30% in comparison to plants irrigated with fresh water.

ACS Style

Angeliki Elvanidi; Cinthya Benitez Reascos; Elissavet Gourzoulidou; Alexander Kunze; Johannes Max; Nikolaos Katsoulas. Implementation of the Circular Economy Concept in Greenhouse Hydroponics for Ultimate Use of Water and Nutrients. Horticulturae 2020, 6, 83 .

AMA Style

Angeliki Elvanidi, Cinthya Benitez Reascos, Elissavet Gourzoulidou, Alexander Kunze, Johannes Max, Nikolaos Katsoulas. Implementation of the Circular Economy Concept in Greenhouse Hydroponics for Ultimate Use of Water and Nutrients. Horticulturae. 2020; 6 (4):83.

Chicago/Turabian Style

Angeliki Elvanidi; Cinthya Benitez Reascos; Elissavet Gourzoulidou; Alexander Kunze; Johannes Max; Nikolaos Katsoulas. 2020. "Implementation of the Circular Economy Concept in Greenhouse Hydroponics for Ultimate Use of Water and Nutrients." Horticulturae 6, no. 4: 83.