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Increasing evapotranspiration of extensive roof greenings by using plants with high transpiration rates and irrigation with grey water

Schmitz, H.; Jauch, M.; Krummradt, I.; Walker, R.; Lohr, D.; Meinken, E. (2018)

Acta Horticulturae 1215, S. 53-56.
DOI: 10.17660/ActaHortic.2018.1215.9


Peer Reviewed
 

Green roofs might mitigate the urban-heat-islands (UHI) due to an increase of evapotranspiration. However, most green roofs are nowadays extensive ones which are designed as dry site without irrigation, with a thin layer of growing medium and drought-adapted vegetation, especially sedum. Under hot and dry conditions - when cooling is needed - evapotranspiration of such green roofs will decrease rapidly because of a shortage of water. To increase evapotranspiration and thus cooling capacity, supplementary irrigation and plants with high transpiration are needed. But the use of drinking water is not sustainable, due to limited resources. Grey water might be an alternative. In a previous work herbs and grasses tolerant to grey water and with high transpiration rates were selected. In the current study evapotranspiration of extensive roof greenings with three mixtures of these plants compared to common sedum greenings was examined. In a 14-month greenhouse experiment, grey water irrigation reduced evapotranspiration of mixtures of herbs and grasses as well as of sedum only up to 15% compared to tap water. Irrespective of water quality, evapotranspiration of herbs grasses mixtures was more than twice as high as evapotranspiration of sedum. Under field conditions an established herbs grasses roof reached an evapotranspiration of 7.5 L m-2 d-1. Based on the results of the greenhouse and field trials the FAO-56 evapotranspiration model was adapted to non-irrigated green roofs with sedum as well as to irrigated sedum and herbs grasses vegetation, respectively. These models show that under hot and dry conditions evapotranspiration of non-irrigated sedum roofs tend towards zero within a few days, whereas irrigated herbs grasses roofs maintain high evapotranspiration rates. At least under weather conditions in central Europe irrigated roof greenings with herbs and grasses can compensate nearly 100% of global radiation during summer. Thus, this new type of high transpiration green roof can reduce UHI sustainable.

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Wirkung karbonisierter organischer Reststoffe auf die Bodenfruchtbarkeit

Paetsch, L.; Lohr, D.; Burmeister, J.; Brandhuber, R.; Meinken, E.; Wiesmeier, M. (2018)

Schriftenreihe der Bayerischen Landesanstalt für Landwirtschaft, 91 Seiten, 1. Auflage, August 2018.


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Charakterisierung der Düngewirkung alternativer P-Dünger im Zierpflanzenbau

Hauck, D.; Lohr, D.; Horn, D.; Meinken, E.; Schmidhalter, U. (2018)

VDLUFA-Kongressband 2018 Münster, VDLUFA-Schriftenreihe 75, 104-111.


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Die Luftkapazität zählt - Lehrschau "Rund um die gesunde Wurzel" auf der IPM 2019

Lohr, D.; Neumaier, D.; Meinken, E. (2018)

DEGA Gartenbau 72 (12), S. 48-49.



Charakterisierung der Düngewirkung alternativer P-Dünger im Zierpflanzenbau

Hauck, D.; Lohr, D.; Horn, D.; Meinken, E.; Schmidhalter, U. (2018)

Vortrag auf dem 130. VDLUFA-Kongress, 18.-21.09.2018, Münster.



Sekundärphosphate als nachhaltige P-Dünger im Zierpflanzenbau

Hauck, D.; Lohr, D.; Meinken, E.; Schmidhalter, U. (2018)

Poster auf der Jahrestagung der Deutschen Gesellschaft für Pflanzenernährung, 13.-14.09.2018, Osnabrück .



Pflanzenschäden in organisch gedüngten Substraten - Sind hohe Ammoniumgehalte die Ursache?

Lohr, D.; Meinken, E. (2018)

Poster auf der 52. Gartenbauwissenschaftlichen Jahrestagung der DGG und des BHGL, 28.02.-03.03.2018, Geisenheim .



Sekundäre Phosphate als P-Dünger bei Topfpflanzen - Charakterisierung der Löslichkeit in unterschiedlichen Extraktionsmitteln

Hauck, D.; Lohr, D.; Meinken, E.; Schmidhalter, U. (2018)

Poster auf der 52. Gartenbauwissenschaftlichen Jahrestagung der DGG und des BHGL, 28.02.-03.03.2018, Geisenheim .



Use of ergosterol as an indicator for colonization of peat-based growing media by saprophytic fungi

Lohr, D.; Wöck, C.; Meinken, E. (2017)

European Journal of Horticultural Science 82 (1), S. 3-11.
DOI: 10.17660/eJHS.2017/82.1.1


Open Access Peer Reviewed
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Colonization of growing media by saprophytic fungi - importance of carbon and nitrogen fractions

Meinken, E.; Lohr, D.; Wöck, C. (2017)

ISHS Acta Horticulturae 1168: International Symposium on Growing Media, Composting and Substrate Analysis - SusGro2015, S. 325-332.
DOI: 10.17660/ActaHortic.2017.1168.42


Peer Reviewed
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Pyrolytic combustion analysis of carbon - a new approach for characterizing growing media

Lohr, D.; Wöck, C.; Meinken, E. (2017)

Proceedings of the International Symposium on Growing Media, Composting and Substrate Analysis (SusGro), Acta Horticulturae No. 1168, S. 341-347.
DOI: 10.17660/ActaHortic.2017.1168.44


Peer Reviewed
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Hydrochars as peat substitute in growing media for organically grown potted herbs

Neumaier, D.; Lohr, D.; Voßeler, R.; Girmann, S.; Kolbinger, S.; Meinken, E. (2017)

Proceedings of the International Symposium on Growing Media, Composting and Substrate Analysis (SusGro), Acta Horticulturae No. 1168, S. 377-385.
DOI: 10.17660/ActaHortic.2017.1168.48


Peer Reviewed
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Verwendung von Agar-Platten als Kontrollproben in der Nahinfrarotspektroskopie

Lohr, D.; Tillmann, P.; Meinken, E. (2017)

VDLUFA-Kongressband 2016 Rostock, VDLUFA-Schriftenreihe 73, S. 617-624.



Organische Dünger auf dem Prüfstand: Stickstoff-Freisetzung

Koch, R.; Degen, B.; Lohr, D.; Meinken, E.; Emmel, M. (2017)

Gärtnerbörse 117 (1), S. 48-51.



Wirkung karbonisierter organischer Reststoffe auf die Bodenfruchtbarkeit

Meinken, E.; Lohr, D. (2017)



Increasing evapotranspiration of extensive roof greenings by using plants with high transpiration rates and irrigation with grey water

Schmitz, H.; Jauch, M.; Krummradt, I.; Walker, R.; Lohr, D.; Meinken, E. (2017)

International Symposium on Greener Cities for More Efficient Ecosystem Services in a Climate Changing World, 12.-15.09.2017, Bologna.



Analysing carbon fractions of growing media by near-infrared spectroscopy

Lohr, D.; Wöck, C.; von Tucher, S.; Meinken, E. (2017)

ISHS Acta Horticulturae 1168: International Symposium on Growing Media, Composting and Substrate Analysis - SusGro2015, S. 333-339.
DOI: 10.17660/ActaHortic.2017.1168.43


Peer Reviewed
mehr

Non-destructive determination of carbohydrate reserves in leaves of ornamental cuttings by near-infrared spectroscopy (NIRS) as a key indicator for quality assessments

Lohr, D.; Tillmann, P.; Drüge, U.; Zerche, S.; Rath, T.; Meinken, E. (2017)

Biosystems Engineering 158, S. 51-63.
DOI: 10.1016/j.biosystemseng.2017.03.005


Peer Reviewed
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Phosphordüngewirkung karbonisierter Biogasgärreste

Leong, K.; Lohr, D.; von Tucher, S.; Meinken, E. (2017)

14. Wissenschaftstagung Ökologischer Landbau (WiTa), 07.-10.03. 2017, Freising.



Organische Dünger in Topfkulturen auf dem Prüfstand - wie steht es mit der Stickstofffreisetzung?

Koch, R.; Emmel, M.; Lohr, D.; Frankenberg, A.; Degen, B.; Meinken, E.; Haas, H....

14. Wissenschaftstagung Ökologischer Landbau (WiTa), 07.-10.03 2017, Freising.



Dr. Dieter Lohr


Hochschule Weihenstephan-Triesdorf

Institut für Gartenbau

T +49 8161 71-3349
F +49 8161 71-3348
dieter.lohr[at]hswt.de