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Nutrient use efficiency and arbuscular mycorrhizal root colonisation of winter wheat cultivars in different farming systems of the DOK long-term trial

Hildermann, Isabell; Messmer, Monika; Dubois, David; Boller, Thomas; Wiemken, Andres and Mäder, Paul (2010) Nutrient use efficiency and arbuscular mycorrhizal root colonisation of winter wheat cultivars in different farming systems of the DOK long-term trial. Journal of the Science of Food and Agriculture, 90 (12), pp. 2027-2038.

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Online at: http://onlinelibrary.wiley.com/doi/10.1002/jsfa.4048/abstract


BACKGROUND: For organic farming, cultivars are required with high nutrient use efficiency under nutrient limited conditions. Arbuscular mycorrhizal fungi (AMF) are known to contribute to nutrient uptake under low input conditions. We compared nutrient use efficiency (NUE) of old and modern organically and conventionally bred cultivars in organic and conventional systems and assessed AMF-root colonisation (AMF-RC) in relation to nutrient concentrations.
RESULTS: Cultivars and systems had a statistically significant effect on nitrogen (N) and phosphorus (P) concentrations and NUE parameters, whereas no genotype × environment interactions appeared. In contrast to N and P uptake, the NUE parameters were higher under organic than under conventional conditions. NUE for N increased with the year of release of cultivars. In the organic systems, the organically bred cultivars could not outperform the conventionally bred cultivars in grain yield and NUE parameters. AMF-RC was higher in the organic than in the conventional system, but did not differ among cultivars.
CONCLUSION: Cultivars achieving high NUE in the organic systems were found among modern cultivars, irrespective of the breeding programme. Nutrient conditions during the breeding programme did not affect AMF-RC. No clear evidence was found that AMF symbiosis contributed more to nutrient concentrations under low input than under high input conditions.

EPrint Type:Journal paper
Keywords:Organic farming, plant breeding, winter wheat, nutrient use efficiency, arbuscular mycorrhizal fungi, Bodenwissenschaften, Biosaatgut, Weizensorten, Pflanzenzüchtung, DOK-Versuch, DOK-Trial
Subjects: Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Crop health, quality, protection
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil Sciences
FP7 Grant Agreement Number:222645
Related Links:http://www.ncbi.nlm.nih.gov/pubmed/20582996, http://cat.inist.fr/?aModele=afficheN&cpsidt=23092247
Deposited By: Hildermann, Mrs Isabell
ID Code:17911
Deposited On:18 Oct 2010 10:58
Last Modified:04 Dec 2014 14:47
Document Language:English
Refereed:Peer-reviewed and accepted

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