Plant Soil Environ., 2015, 61(5):201-207 | DOI: 10.17221/28/2015-PSE

The relationships and sensibility of wheat C:N:P stoichiometry and water use efficiency under nitrogen fertilizationOriginal Paper

W. Yan, Y. Zhong, Z. Shangguan
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, P.R. China

A field study was conducted to investigate the variations in the carbon:nitrogen:phosphorus (C:N:P) stoichiometry of winter wheat (Triticum aestivum L.) and its relationships with wheat growth rate (r) and water use efficiency (WUE) under different rates of N fertilization. The results indicated that the growth rate and WUE of wheat significantly increased with N fertilization and were strongly correlated with the N and P contents and C:N:P ratio. The C content in wheat was relatively stable, regardless of N fertilization, and the N contents were higher in the N fertilization treatments. In addition, the P contents were higher in the treatments without N fertilization, and changes in the C:P and N:P ratios mainly depended on changes in P. The response ratio of the N:P ratio in straw was higher than that of the other investigated traits and largely depended on changes in the plant P content due to N addition.

Keywords: grain yield; evapotranspiration; wheat production; nutrient availability; macroelement

Published: May 31, 2015  Show citation

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Yan W, Zhong Y, Shangguan Z. The relationships and sensibility of wheat C:N:P stoichiometry and water use efficiency under nitrogen fertilization. Plant Soil Environ. 2015;61(5):201-207. doi: 10.17221/28/2015-PSE.
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