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Results from a Research Project about foliar fertilizers in organic fruit-growing

Belz, J. and Pfeiffer, B. (2004) Results from a Research Project about foliar fertilizers in organic fruit-growing. [Ergebnisse aus einem Forschungsprojekt zu Blattdüngern im ökologischen Obstbau.] In: Boos, Markus (Ed.) Ecofruit - 11th International Conference on Cultivation Technique and Phytopathological Problems in Organic Fruit-Growing: Proceedings to the Conference from 3rd February to 5th February 2004 at Weinsberg/Germany, pp. 150-156.

[thumbnail of 28_Belz_150_156.pdf] PDF - German/Deutsch


The intention of this research project, which was supported within the "Bundesprogramm Ökologischer
Landbau", was to investigate in 2003 the situation on organic apple farms of nutrition of
leaves and fruits of the variety 'Topaz' and 'Elstar'. The contents of N, P, K, Ca and Mg were determined
in the leaves in April, June and August, micronutrients like Fe, Mn, Zn, B and Cu in April and
August. The number of flower-clusters per tree, the fruit-setting and the yield were investigated.
There were great differences between the orchards, the yield per tree varied between 3 and 24 kg,
depending from the age and height of the trees. Field trials were done to proof the effect of the foliar
fertilizers Vinasse, Biokal, Phytoamin, Wuxal Ascofol and Humulus. Effects on the fruit-setting (apples
per flower-cluster) were low after application for one season. The average fruit-weight did not
vary heavily, some differences were found in the percentage of flowerbuds in December 2003.

Summary translation

Im Rahmen des Bundesprogramms "Ökologischer Landbau" ergab sich die Möglichkeit, bei den
Sorten 'Elstar' und 'Topaz' die Nährstoffversorgung der Blätter und Früchte auf ökologisch wirtschaftenden
Obstbaubetrieben im mittleren Neckarraum zu untersuchen. Ähnliche Untersuchungen wurden
von Kopp und Gutberlett (2002) im Bodenseegebiet durchgeführt. Parallel sollten Exaktversuche
zum Einfluss von Blattdüngern auf den Fruchtansatz angelegt werden. Die Laufzeit des Projektes
war auf 14 Monate begrenzt.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Apple, organic fruit-growing, leaf fertilizers, Vinasse, Biokal, Phytoamin, Wuxal Ascofol, Humulus
Subjects: Crop husbandry > Crop health, quality, protection
Crop husbandry > Production systems > Fruit and berries
Research affiliation: International Conferences > 2006: Ecofruit
Related Links:http://www.ecofruit.net
Deposited By: Tagung, Ecofruit
ID Code:14529
Deposited On:18 Sep 2008
Last Modified:12 Apr 2010 07:38
Document Language:German/Deutsch
Refereed:Peer-reviewed and accepted

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