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Klimawandel im Garten. Teil VII: Gestaltet: entsiegeln und pflanzen

Fröhler, L.; Bucher, A. (2022)

Gartenpraxis 08/2022, S. 38-42.

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Klimawandel im Garten. Teil VI: Kostbar: Wasser und Bewässerung

Fröhler, L.; Bucher, A. (2022)

Gartenpraxis 07/2022, S. 34-38.

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Klimawandel im Garten. Teil V: Gefährdet: kontrollieren und ernten

Fröhler, L.; Bucher, A. (2022)

Gartenpraxis 06/2022, S. 54-59.

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Klimawandel im Garten. Teil IV: Gegessen: säen und ernten

Fröhler, L.; Bucher, A. (2022)

Gartenpraxis 05/2022, S. 48-53.

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Klimawandel im Garten. Teil III: Gemulcht: Bedecken und schützen

Fröhler, L.; Bucher, A. (2022)

Gartenpraxis 04/2022, S. 54-59.

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Klimawandel im Garten. Teil II: Fruchtbar: Boden und Düngung

Fröhler, L.; Bucher, A. (2022)

Gartenpraxis 03/2022, S. 46-51.

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Klimawandel im Garten. Teil I: Herausgefordert: Pflanzen und Gärtner

Fröhler, L.; Bucher, A. (2022)

Gartenpraxis 02/2022, S. 40-43.

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Reduction of nitrogen leaching from nursery potting mixes by Chabazite

Bucher, A.; Lohr, D.; Meinken, E. (2021)

Acta Hort. 1327, S. 161-166.
DOI: 10.17660/ActaHortic.2021.1327.21

 

Due to coarse textured, fast-draining growing media with poor buffer capacity, nitrogen leaching after heavy rainfall is a major concern in container nurseries. The amendment of growing media with Chabazite – a natural zeolite with high ammonium (NH4+) exchange capacity – in combination with NH4+ fertilization might reduce nitrogen losses significantly. This was tested in a pot trial with Photinia fraseri. Growing media amended with Chabazite were compared with a pumice containing growing medium as control. Chabazite was used on the one hand untreated and on the other hand it was charged with ammonium sulfate ((NH4)2SO4) with loads of 1 and 5 g ammonium nitrogen (NH4-N) pot‑1. During the first part of the trial, pots with untreated Chabazite were repeatedly fertilized with NH4+ and leached after each fertilizer application. Pots with charged Chabazite were also leached on the same dates. In the second part, pots with untreated Chabazite received an excessive NH4+ supply and were leached several times afterwards. In both parts of the trial, NH4+ was adsorbed by Chabazite after fertilization. Higher amounts of NH4+ were leached from growing media with pumice than from those with untreated Chabazite. In leachates from growing media with NH4+-charged Chabazite, higher amounts of nitrate (NO3-) were only found in the case of charging with 5 g N pot‑1. Whereas after excessive NH4+ fertilization leaching of NH4+ remained low in presence of Chabazite, summing up to 5% of the applied N, in the control leached NH4+ was 28% of fertilized NH4+. Thus, it can be concluded that fertilized NH4+ was adsorbed to Chabazite and thus protected from direct leaching as well as from nitrification and subsequent leaching as NO3-. This protection decreased with increasing NH4+ charging of Chabazite. Hence, the combination of Chabazite with repeated NH4+ fertilization is a promising approach to reduce nitrogen leaching from container nurseries.

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Effect of untreated and NH4-charged Chabazite on growth and nitrogen uptake of Photinia fraseri 'Red Robin'

Bucher, A.; Lohr, D.; Meinken, E. (2021)

Acta Hort. 1327, S. 143-148.
DOI: 10.17660/ActaHortic.2021.1327.18

 

Amendment of growing media with Chabazite, a natural zeolite with a high ammonium sorption capacity, in combination with ammonium fertilization might be a promising approach to reduce nitrogen leaching in container nurseries. However, it is unclear if ammonium, which is adsorbed to Chabazite is still plant-available. Thus, a pot trial with Photinia fraseri was conducted with growing media containing 25 vol % of either pumice or Chabazite. Chabazite firstly was used as received and secondly was charged with two levels of ammonium resulting in nitrogen loads of 1 and 5 g N pot‑1, respectively. The untreated Chabazite was fertilized with 1 g N pot‑1 as ammonium sulfate divided in repeated applications in accordance with the control (pumice). In these two treatments plant growth and nitrogen uptake was more or less the same. Plants in the growing media with NH4-charged Chabazite receiving also 1 g N pot‑1 produced a significantly lower fresh mass compared to the untreated Chabazite and pumice and suffered from slight nitrogen deficiency. If 5 g N pot‑1 were applied with charged Chabazite, plants grew better and took up more nitrogen. The results indicate that Chabazite did not influence negatively plant availability of fertilized ammonium. However, ammonium from charged Chabazite is only partly plant-available. With increasing NH4 charging of Chabazite, ammonium and nitrate accumulated in the growing media.

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Lass es brummen – Fachwissen und Anwendungen für mehr Artenvielfalt vom Garten bis zum Balkon

Moning, C.; Meßlinger, K.; Bucher, A.; Hauser, B.; Hoffmann, A.; Kell, K....

Lass es brummen – Fachwissen und Anwendungen für mehr Artenvielfalt vom Garten bis zum Balkon, VHB-Kurs, 32 Stunden 2021.


Open Access
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Effect of non-charged and NH4-charged chabazite on growth and nitrogen uptake of Photonia fraseri 'Red Robin'

Bucher, A.; Lohr, D.; Meinken, E. (2021)

4th International Symposium on Horticulture in Europe, 09.-11.03. 2021, virtual.


Reduction of nitrogen leaching from nursery potting mixes by chabazite

Bucher, A.; Lohr, D.; Meinken, E. (2021)

4th International Symposium on Horticulture in Europe, 09.-11-03.2021, virtual.


Using new substrate materials in Germany

Bucher, A. (2020)

Vortrag zum Seminar für Gärtner am 16.01.2020 in Ljubljana/Slowenien (ZPORS Zdruzenje pridelovalcev okrasnih rastlin Slovenije).

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Vertical indoor greenings as support for climate control in low-energy buildings

Bucher, A. (2020)

Vortrag zum Seminar für Gärtner am 16.01.2020 in Ljubljana/Slowenien (ZPORS Zdruzenje pridelovalcev okrasnih rastlin Slovenije.

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Anforderungen der Pflanze an das Substrat

Bucher, A. (2019)

Vortrag zum Tag des Bodens am 05.12.2019, LWG Veitshöchheim.

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Begrünte Oberflächenverdunster verbessern die Luftfeuchtigkeit von Innenräumen

Bucher, A.; Kohlrausch, F. (2018)

Neue Landschaft 1/18, S. 33-36.


Unterstützung der Klimatisierung energetisch hoch effizienter Gebäude

Bucher, A.; Kohlrausch, F. (2017)

GebäudeGrün (4), S. 36-41.


Klimatisierung von energetisch hocheffizienten Gebäuden durch vertikale Innenraumbegrünung

Bucher, A. (2017)

GebäudeGrün 3/17.


Klimatisierung von energetisch hocheffizienten Gebäuden durch vertikale Innenraumbegrünung

Bucher, A.; Kohlrausch, F. (2017)

GebäudeGrün 4/17, S. 36-41.


Vertical indoor greenings as a support for improving indoor climate in low-energy buildings

Bucher, A.; Kohlrausch, F. (2017)

Acta Horticulturae No. 1189, Proceedings of the 6th International Conference on Landscape & Urban Horticulture, 2016 in Athens, Ed. M. Papafotiu et al., S. 247-250.
DOI: 10.17660/ActaHortic.2017.1189.47

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Dr. rer. hort. Annette Bucher


Hochschule Weihenstephan-Triesdorf

Institut für Gartenbau

T 08161 71-5620
annette.bucher[at]hswt.de