Nitrogen dynamics in grain crop and legume pasture systems under elevated atmospheric carbon dioxide concentration: A meta-analysis

SK Lam; D Chen; R Norton; R Armstrong; AR Mosier

Journal article

Nitrogen dynamics in grain crop and legume pasture systems under elevated atmospheric carbon dioxide concentration: A meta-analysis

SK Lam, D Chen, R Norton, R Armstrong, AR Mosier

Global Change Biology | Published : 2012

DOI: 10.1111/j.1365-2486.2012.02758.x

Abstract

Understanding nitrogen (N) removal and replenishment is crucial to crop sustainability under rising atmospheric carbon dioxide concentration ([CO 2]). While a significant portion of N is removed in grains, the soil N taken from agroecosystems can be replenished by fertilizer application and N 2 fixation by legumes. The effects of elevated [CO 2] on N dynamics in grain crop and legume pasture systems were evaluated using meta-analytic techniques (366 observations from 127 studies). The information analysed for non-legume crops included grain N removal, residue C: N ratio, fertilizer N recovery and nitrous oxide (N 2O) emission. In addition to these parameters, nodule number and mass, nitrogen..

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University of Melbourne Researchers

Shu Kee Lam Author

Deli Chen Author

Robert Norton Author

Roger Armstrong Author

Related Projects (1)

BELOW-GROUND PROCESSES: FILLING THE MISSING GAP IN PREDICTING THE RESPONSE OF GRAIN PRODUCTION TO ELEVATED CO2 IN SOUTHERN AUSTRALIA

Climate change is expected to have major impacts on the Australian grains industry, which is worth $7 billion annually. Although increases i..

Grants

Awarded by Australia Research Council

Awarded by Australian Research Council

Funding Acknowledgements

We wish to thank Prof. Peter Vitousek (Stanford University) for valuable comments on our manuscript, Dr. Kees Jan van Groenigen (Northern Arizona University) and Dr. Sandy Clarke (University of Melbourne) for assistance in meta-analytic procedures, and the authors who provided information for the construction of the database. This work was supported by Australia Research Council (LP100200757), Department of Climate Change (former Australian Greenhouse Office) and the Melbourne International Research Scholarship.