Does elevated atmospheric carbon dioxide concentration increase wheat nitrogen demand and recovery of nitrogen applied at stem elongation?

SK Lam; X Han; E Lin; R Norton; D Chen

Journal article

Does elevated atmospheric carbon dioxide concentration increase wheat nitrogen demand and recovery of nitrogen applied at stem elongation?

SK Lam, X Han, E Lin, R Norton, D Chen

Agriculture Ecosystems and Environment | Published : 2012

DOI: 10.1016/j.agee.2012.04.012

Abstract

The effect of elevated carbon dioxide concentration ([CO 2]) on fertilizer nitrogen (N) recovery in wheat grown under open-air conditions in the North China Plain has not been reported. Winter wheat (Triticum aestivum L. cv. Zhongmai 175) was grown to maturity under ambient (415±16μmolmol -1) and elevated (550±17μmolmol -1) [CO 2] at the free-air carbon dioxide enrichment (FACE) facility in a semi-arid region in northern China. We applied 15N-enriched (10.22at.%) granular urea to microplots at either 25 or 95kgNha -1 at the stem elongation stage of wheat. Elevated [CO 2] increased wheat biomass (29%) and grain yield (23%), but had no significant effect on grain protein concentration. The [CO..

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University of Melbourne Researchers

Shu Kee Lam Author

Robert Norton Author

Deli Chen Author

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Grants

Awarded by Australian Research Council

Funding Acknowledgements

This work was supported by the Australian Greenhouse Office, the Australian Centre for Agricultural Research (ACIAR), a Riady Scholarship and Australian Research Council (LP100200757). The authors wish to thank Ji Gao, Qiubing Ye, Xingyu Hao, Xiaogang Dong, Haiyin Yan and Ying Wang for field assistance, and Jianlei Sun for assistance with chemical analyses.