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Design and assessment of legume-supported cropping systems

Reckling, Moritz (2018). Design and assessment of legume-supported cropping systems. Diss. (sammanfattning/summary) Uppsala, Sweden : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2018:69
ISBN 978-91-7760-280-4
eISBN 978-91-7760-281-1
[Doctoral thesis]

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Abstract

Legumes provide high quality protein for food and feed as well as other ecosystem services, but it is still challenging to use them to meet the growing global demand for protein, partly because European farmers consider their cultivation unprofitable and risky. This thesis aims to design legume-supported cropping systems and assess their environmental and economic impacts along with their production risks in European agriculture.
The approaches used included (i) the development of a framework to design cropping systems and to assess impacts of management, (ii) modelling the impact of integrating legumes into cropping systems and assess trade-offs, (iii) the development of a statistical method to quantify crop yield stability independent of the mean yield, (iv) assessing grain legume yield stability statistically compared to other crops using data from long-term experiments, and (v) participatory methods to re-design legume-supported cropping systems.
The framework consists of a rule-based rotation generator and algorithms to calculate impact indicators, following a three-step approach: (i) generate rotations, (ii) evaluate crop production, and (iii) assess cropping systems. It was used to design and assess legume-supported cropping systems in five case study regions in Europe and to identify trade-offs between economic and environmental impacts. On average, the generated cropping systems with legumes reduced N2O emissions by 18 % and 33 % and N fertilizer use by 24 % and 38 % in arable and forage systems, respectively, compared to systems without legumes. Grain legumes increased gross margins in two of five regions and forage legumes in all three study regions. A scale-adjusted coefficient of variation was developed as a stability measure that accounts for mean yield differences. Using data from five long-term experiments in northern Europe, this method showed that yield instability of grain legumes (30 %) was higher (P < 0.001) than that of autumn-sown cereals (19 %), but lower (P < 0.001) than that of other spring-sown broad-leaved crops (35 %), and only slightly greater (P = 0.042) than spring-sown cereals (27 %). The combination of on-station and on-farm trials with crop rotation modelling was useful when re-designing cropping systems. Nine agronomic practices were identified for improving grain legume production at the farm level.
In this thesis, it is shown that legumes can provide both economic and environmental benefits, the instability of yields is similar to other spring crops and that cropping systems can be re-designed effectively in a co-learning process with farmers.

Authors/Creators:Reckling, Moritz
Title:Design and assessment of legume-supported cropping systems
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :20 November 2018
Depositing date:20 November 2018
Volume:2018:69
Number of Pages:80
Papers/manuscripts:
NumberReferences
1Reckling M., Hecker J.-M., Bergkvist G., Watson C., Zander P., Stoddard F., Eory V., Topp K., Maire J., Bachinger J. (2016). A cropping system assessment framework - evaluating effects of introducing legumes into crop rotations. European Journal of Agronomy 76:186-197.
2Reckling M., Bergkvist G., Watson C. A., Stoddard F.L., Zander P. M., Walker R., Pristeri A., Toncea I., Bachinger J. (2016). Trade-offs between economic and environmental impacts of introducing legumes into cropping systems. Frontiers in Plant Science 7:669.
3Döring, T.F. and Reckling, M. (2018). Detecting global trends of cereal yield stability by adjusting the coefficient of variation. European Journal of Agronomy, 99:30-36.
4Reckling, M., Döring, T. F., Bergkvist, G., Stoddard, F. L., Watson, C. A., Seddig, S., Chmielewski, F.-M., and Bachinger, J. (2018). Grain legume yields are as stable as other spring crops in long-term experiments across northern Europe. Agronomy for Sustainable Development, 38:63.
5Reckling, M., Bergkvist, G., Watson, C. A., Stoddard, F. L. and Bachinger, J. Re-designing grain legume cropping systems using systems’ agronomy. (submitted manuscript)
Place of Publication:Uppsala, Sweden
Publisher:Department of Crop Production Ecology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-280-4
ISBN for electronic version:978-91-7760-281-1
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F08 Cropping patterns and systems
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:Diversification, participation, pulses, rotations, trade-offs, yield variability
URN:NBN:urn:nbn:se:slu:epsilon-e-5119
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-5119
ID Code:15769
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: Moritz Reckling
Deposited On:21 Nov 2018 08:23
Metadata Last Modified:28 Nov 2018 07:35

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