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

Koch, Robert; Emmel, M.; Lohr, D.; Frankenberg, Andrea; Degen, B.; Meinken, E.; Haas, HP. and Fischinger, Stephanie (2017) Organische Dünger in Topfkulturen auf dem Prüfstand - wie steht es mit der Stickstofffreisetzung? Paper at: 14. Wissenschaftstagung Ökologischer Landbau, Campus Weihenstephan, Freising-Weihenstephan, 07.-10. März 2017.

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Summary

Matching nitrogen demand of plants and N release of organic fertilizers with respect to amount and timing is one key for successful cultivation of organic ornamentals. Thereby for plants with a low to moderate N demand growers can add the fertilizer as complete preplant application (CPA). For plants with a high N demand splitting fertilization in a reduced preplant application combined with an additional fertigation (RPA+F) is preferable. Aim of the current research was the investigation of N release of organic fertilizers in incubation experiments. Results of the incubation experiment were linked to a pot trial with pelargonium. Incubation experiments reveal that most
fertilizers release about 40 to 50 % of total N and most nitrogen is released within the first 21 days. Only for sheep wool a delay of N release up to ten days was found. CPA using sheep wool and RPA+F (irrespective of fertilizer) give the best results. The delayed release pattern of sheep wool seems to match best N demand of plants.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:organic fertilization strategies, organic fertilizer, ornamental pot plants
Subjects: Soil > Soil quality
Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Environmental aspects > Air and water emissions
Research affiliation: Germany > Bioland
Germany > University of Applied Science Weihenstephan
Germany > Landwirtschaftskammern
International Conferences > 2017: Scientific Conference German Speaking Countries > Soil fertility
Germany > Other organizations
ISBN:978-3-89574-925-4
Deposited By: Hasreiter, Anna
ID Code:31877
Deposited On:04 Jul 2017 17:21
Last Modified:04 Jul 2017 17:21
Document Language:German/Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 14. Wissenschaftstagung erschienen.
S. Wolfrum, H. Heuwinkel, H.J. Reents, u.a. (Hrsg.) (2017): Ökologischen Landbau weiterdenken - Verantwortung übernehmen - Vertrauen stärken. Beiträge der 14. Wissenschaftstagung Ökologischer Landbau, Freising-Weihenstephan, 7.-10. März 2017
Verlag Dr. Köster, Berlin

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