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Environmental Chemistry Letters

, Volume 16, Issue 2, pp 631–636 | Cite as

Preceding cultivation of grain legumes increases cereal yields under low nitrogen input conditions

  • Charles Cernay
  • David Makowski
  • Elise Pelzer
Original Paper

Abstract

The European Union (EU) has advised to increase the production of grain legumes, both to reduce EU dependency on soybean imports from the Americas and to reduce pollution from intensive cereal production. Several studies have indicated that preceding grain legume had a positive effect on the yields of subsequent cereals; this argument being often used to promote cultivation of grain legumes. However, no quantitative synthesis of the data has been performed on a global scale to estimate the relative increases in cereal yields arisen from cultivation of preceding grain legumes. Here, we performed a meta-analysis of 1181 yields of cereals cultivated in 15 countries. The results show that the yields of cereals cultivated after grain legumes were, on the average, + 29% higher than the yields of cereals cultivated after cereals. Our findings also show that the positive effect of grain legumes decreased with the nitrogen (N) fertilization applied to subsequent cereals, then became negligible when the mean N fertilization exceeded 150 kg N ha−1. This threshold is often exceeded in European conventional cereal systems.

Keywords

Grain legume Cereal Nitrogen Fertilization Meta-analysis 

Notes

Acknowledgements

We thank K. E. Giller, M. A. Liebig, P. R. Miller, and M. Unkovich for providing us with additional information and raw data. We thank A. Bône for assistance with the literature search. This work was supported by the French National Research Agency (ANR) under the ‘Investments for the Future’ programme (ANR–10–IDEX–0003–02) and under the STIMUL (scenarios towards integrating multi-scale land use tools) flagship project as part of the LabEx BASC (ANR–11–LABX–0034).

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2017

Authors and Affiliations

  1. 1.UMR Agronomie, INRA, AgroParisTechUniversité Paris-SaclayThiverval-GrignonFrance

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