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Verbesserung der Stickstoff(N)-Effizienz im Ökologischen Landbau - Bedeutung der N-Aufnahme- und N-Verwertungseffizienz bei Triticale, Weizen und Roggen

Thiemt, Elisabeth M. (2007) Verbesserung der Stickstoff(N)-Effizienz im Ökologischen Landbau - Bedeutung der N-Aufnahme- und N-Verwertungseffizienz bei Triticale, Weizen und Roggen. [Improvement of nitrogen (N) use efficiency in organic farming systems –Influence of N uptake and N utilization efficiency in triticale, wheat, and rye.] Paper at: Zwischen Tradition und Globalisierung - 9. Wissenschaftstagung Ökologischer Landbau, Universität Hohenheim, Stuttgart, Deutschland, 20.-23.03.2007.

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Summary

Organic farming systems are characterized by reduced nitrogen supply. Nitrogen (N) is one of the most important yield limiting factors and an essential component for proteins. For organic farming cereal varieties with high N use efficiency are required. The main components of N use efficiency are N uptake and N utilization efficiency. Triticale has shown to be very suitable for organic farming due to its tolerance to marginal conditions and high competition against weeds. Little is known about N use efficiency and its components in triticale. The aims of the study were to i) analyze the influence of N uptake and N utilization efficiency for improved N efficiency, ii) estimate quantitative genetic parameters for N uptake and N utilization efficiency, and iii) com-pare the findings for triticale with its parents wheat and rye. A total of 36 triticale, nine wheat and nine rye genotypes were tested in two locations with two N levels each, according to the rules for organic farming. The material was not pre-selected for N use efficiency. Significant genotypic variation was found for N use efficiency and its com-ponents N uptake and N utilization efficiency for triticale. So an important prerequisite for breeding for improved N use efficiency is met. The correlations between N use efficiency and its both components were high for all three cereals. N uptake and N utilization efficiency showed no significant association with each other. As a conse-quence these traits can be improved independently.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Pflanzenzüchtung, Stickstoffeffizienz, Triticale, Weizen, Roggen, BÖL, BOEL, FKZ 03OE617
Subjects: Crop husbandry > Breeding, genetics and propagation
Research affiliation: International Conferences > 2007: Scientific Conference on Organic Agriculture > 1 Plant and Soil > 1.3 Plant breeding
Related Links:http://www.bundesprogramm-oekolandbau.de, http://www.bundesprogramm.de/fkz=03OE617, http://orgprints.org/perl/search/advanced?addtitle%2Ftitle=&keywords=03OE617&projects=BOEL&_order=bypublication&_action_search=Suchen
Deposited By: Thiemt, Dr Elisabeth
ID Code:9616
Deposited On:10 May 2007
Last Modified:12 Apr 2010 07:34
Document Language:German - Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Die endgültige Version des Beitrags ist veröffentlicht in:
S. Zikeli, W. Claupein, S. Dabbert, B. Kaufmann, T. Müller und A. Valle Zárate, Hrsg. (2007)
Zwischen Tradition und Globalisierung – 9. Wissenschaftstagung Ökologischer Landbau, Universität Hohenheim, Deutschland, 20.-23. März 2007, http://orgprints.org/10742/

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