Ivonne Jüttner,
Nicolas Mauser,
Sabine Wittmann,
Eleonora Itri,
Prof. Dr. Heike Susanne Mempel
Berechtigungen: Peer Reviewed
Development of an indoor farming cultivation process for Rhodiola rosea, using an aeroponic and deep-water irrigation method (2023) Acta Hortic. 1369, 165-170 .
DOI: 10.17660/ActaHortic.2023.1369.20
B.Sc. Julian Hecht,
Alexander Kunze,
Sabine Wittmann,
Prof. Dr. Heike Susanne Mempel,
Ivonne Jüttner
Berechtigungen: Peer Reviewed
Influence of different light spectra on growth and quality of Rosmarinus officinalis cultivars in a deep- water vertical indoor farming system (2023) ISHS Acta Horticulturae 1369: XXXI International Horticultural Congress (IHC2022): International Symposium on Advances in Vertical Farming .
DOI: 10.17660/ActaHortic.2023.1369.27
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Berechtigungen: Peer Reviewed
Fruit vegetables in indoor farming – potential of chili pepper production (2023) Acta Hortic. 1369, 31-40 .
DOI: 10.17660/ActaHortic.2023.1369.4
Prof. Dr. Heike Susanne Mempel,
M. Hasan,
M. Bourouah,
S. Singh,
I. Mani,
L. Kumar,
V. Paradkar,
Markus Abel,
Sabine Wittmann,
Ivonne Jüttner
Berechtigungen: Peer Reviewed
Development of an automated ion-specific fertigation management system (2023) Acta Hortic. 1369, 179-184 .
DOI: 10.17660/ActaHortic.2023.1369.22
Markus Abel,
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Berechtigungen: Peer Reviewed
Spectrophotometric monitoring of the uptake of macronutrients in a pak choi deep water culture (2023) Acta Hortic. 1369, 185-190 .
DOI: 10.17660/ActaHortic.2023.1369.23
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Berechtigungen: Peer Reviewed
Pulsed light − optimal ratio between yield and energy reduction (2023) Acta Hortic. 1369, 227-234 .
DOI: 10.17660/ActaHortic.2023.1369.28
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Several lighting strategies in an indoor farm are compared regarding the annual electrical energy consumption. Based on measurements of the energy consumption during one experiment, conducted inside the indoor farm at the HSWT, an energy balancing model was calibrated and subsequently validated by a second experiment. The model was then used to calculate the potential reduction of the annual electrical energy consumption concerning several different lighting strategies. Furthermore, different settings of temperature set points and the impact of an optimized heat transfer coefficient as well as a more efficient performance for heating and cooling are considered. The measured and the modeled energy consumption and the values regained by the model showed a high regression coefficient (R2=0.936). The prediction of the energy consumption during the second experiment was also possible (R2=0.738) with a total difference to the measured consumption of 29.1 kWh. Regarding the given technical settings of the indoor farm, the annual electrical energy consumption can be reduced by up to 16% by an adjustment of the temperature strategy while reaching a similar yield. By assuming an optimized technical setting, the relevance of the lighting strategy increased significantly. Based upon this an annual reduction of the electrical energy consumption of up to 21% seemed conceivable.
Mehr
Wissenschaftliche Poster
Ivonne Jüttner,
Nicolas Mauser,
Sabine Wittmann,
Eleonora Itri,
Prof. Dr. Heike Susanne Mempel
Development of an indoor farming cultivation process for Rhodiola rosea, using an aeroponic and deep-water irrigation method (2022) 31. International Horticultural Congress (IHC2022); International Symposium on advances in Vertical Farming .
Ivonne Jüttner,
B.Sc. Julian Hecht,
Alexander Kunze,
Sabine Wittmann,
Prof. Dr. Heike Susanne Mempel
Influence of different light spectra on growth and quality of Rosmarinus officinalis cultivars in a deep- water vertical indoor farming system (2022) 31. International Horticultural Congress (IHC2022): International Symposium on Advances in Vertical Farming .
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Pulsed light − optimal ratio between yield and energy reduction (2022)
Heinz-Josef Schmitz,
Ivonne Jüttner,
Dr. Dieter Lohr,
Prof. Dr. Elke Meinken
Extensive green roofs are a key component of urban water management in the future. On the one hand, they should mitigate urban heat islands, for which evapotranspiration has to be maximized, and on the other hand, they are supposed to reduce the risk of urban floods after heavy precipitation events. To achieve these goals, an exact measurement of the water supply status is necessary. In arable soils as well as in organic growing media, dielectric sensors are widely common. However, there is only little knowledge about the suitability of this kind of sensors for mineral and coarse-textured substrates used for extensive green roofs. In the current research four dielectric sensors (EC-5, 10 HS, SMT 100 and Aquaflex TR) were tested using five different green roof substrates. The five substrates were filled in plastic boxes of 80 x 60 cm. Substrate height was 15 cm and the four sensors were placed at half height. Afterwards, white lupine was sown and cultivated up to a height of about 30 cm. For testing the sensors, the substrates were saturated with water and then they have been left to dry out until plants show severe signs of wilt. During dry out, the sensor signals as well as the weight of the boxes were recorded automatically every five minutes. For each substrate six consecutive drying cycles were done. With exception of the Aquaflex TR, for all sensors output signals were closely linear correlated to the weight loss and signal ranges were comparable for the six drying cycles. However, significant differences in output signals of the sensors between the five tested substrates were observed. This indicates a need for substrate specific calibrations. The relation between the output signal of the Aquaflex TR and the weight loss was not linear, but also reproducible and suitable to assess water supply status of plants.
Mehr
B.Sc. Julian Hecht,
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Einfluss des Belichtungs- und Kultursystems auf den Wuchs und weitere physiologische Paramater von Solanum lycopersicum (2021) Annual Conference DGG and BHGL 09.03.2021, Stuttgart (online), Germany .
Ivonne Jüttner,
S. Pfeil,
Prof. Dr. Elke Meinken
Auswirkung von Entfettung und Hitzebehandlung auf das N-Freisetzungsverhalten von Schafwolle (2018) Poster auf der 52. Gartenbauwissenschaftlichen Jahrestagung der DGG und des BHGL, 28.02.-03.03.2018, Geisenheim .
Vorträge
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Fruit vegetables in indoor farming – potential of chili pepper production (2022) 31. International Horticultural Congress (IHC2022): International Symposium on Advances in Vertical Farming .
Zeitschriftenbeiträge (peer-reviewed)
Prof. Dr. Heike Susanne Mempel,
Ivonne Jüttner,
Sabine Wittmann
Plant production in indoor farming systems offers significant advantages compared to open field orgreenhouse production systems. Especially in terms of quality and the ability for automation the system is superior to the conventional production systems. Concerning resource consumption indoor farming has considerable advantages in regard to water consumption and the use of pesticides.The main disadvantage is the high consumption of electrical energy. Taking advantage of the specific benefits or eliminating the disadvantages, for example by using renewable energies, different potentials and fields of application for indoorfarming arise.The paper outlines the potentials and future fields of application of indoor farming considering the specific differences to conventional production systems related to resource consumption, quality and automation.
Mehr
Sabine Wittmann,
Ivonne Jüttner,
B.Sc. Marvin Spence,
Prof. Dr. Heike Susanne Mempel
Climate change and increasing global urbanization accelerate the expansion of protected cultivation systems. However, certain dependences to external weather conditions remain even in modern greenhouses. Indoor vertical farming, on the other hand, pursues complete inde-pendence from external weather conditions with the aim for highly accurate control of all crop parameters. Particularly with regard to the advancing climate change and the need for sustainable resource consumption, there are clear advantages due to the year-round and independent cultivation of plants and raw materials under optimal conditions. The complexity in the optimal networking of the plant-technology systems offers intensive development opportunities for dig-itization and interdisciplinary collaboration.
Mehr
Sabine Wittmann,
Ivonne Jüttner,
Prof. Dr. Heike Susanne Mempel
Indoor vertical farming offers great opportunities regarding a sustainable and consistent production of high-quality herbs and raw materials all year round for the perfume, chemical, or food industry. Cultivation takes place in an enclosed structure, operating predominantly independent from external conditions in multi-layer systems equipped with artificial lighting, enabling extremely high resource use efficiencies with a simultaneous increase in yield. On the other hand, field production in terms of plant quality and harvesting times is highly influenced by environmental conditions, making it difficult to maintain homogenous raw material qualities throughout the year. To show how different light qualities affect the overall efficiency and quality of Origanum majorana grown in an indoor farm, the resource consumption, yield, and cultivation time as well as the essential oil quantity was analyzed, and the efficiencies in terms of energy and land use efficiency calculated. The experimental setup clearly demonstrated that the yield regarding fresh as well as dry matter and oil content was comparable to one square meter of open field production. Based on this, the multi-layer system and the noticeable lowered growth period result in a significantly higher area efficiency compared to the open field, leading to a potential increase of annual yields of dried leave weight and oil contents by up to 21 times. It was also shown that a white spectrum (W) showed similar influence on plant growth and yield as a spectrum consisting of blue and red (B/R). Nevertheless, the LED treatment W did show higher light use efficiencies as well as a better working conditions inside the cultivation chamber. By an integration of indoor vertical farming into existing industrial processes, new and innovative opportunities for a flexible and low-risk supply chain seem feasible and according to German food industry meet the interests of existing stakeholders.
Im Projekt wird der regionale Anbau von Indoor Arzneipflanzen zur Bereitstellung und Nutzung nachwachsender Ressourcen am Beispiel von Rhodiola sowie Baldrian untersucht.
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Ziel ist die Entwicklung eines neuen nachhaltigen Substrats basierend auf regional produzierten Naturfasern, welches die hohen Anforderungen der Hydroponik in Gewächshäusern und Indoor Farms erfüllt …
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