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Effect of dicyandiamide and hydroquinone on the transformation of urea-nitrogen-15 in soil cropped to wheat |
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| Authors: | Xingkai Xu Yao Huang Likai Zhou Guohong Huang Oswald Cleemput |
| Institution: | State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, People's Republic of China, Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, People's Republic of China, Laboratory of Applied Physical Chemistry, Faculty of Agricultural and Applied Biological Sciences, University of Ghent, 9000 Gent, Belgium, |
| Abstract: | A pot experiment with a loam soil and spring wheat as test crop showed that an application of dicyandiamide (DCD), and especially its combination with hydroquinone (HQ), gave a much larger recovery of soil urea-15N than treatments based on the application of urea alone or urea plus HQ. Most of the urea-15N applied to soil was present as organic plus chemically fixed 15N in the DCD and DCD plus HQ treatments. These two treatments showed the smallest accumulation of urea-derived (NO3-+NO2-)-15N. Under well-drained conditions, there was a synergistic effect of the nitrification inhibitor DCD and the urease inhibitor HQ on urea-15N transformations and the recovery of fertilizer 15N in soil after the application of urea. |
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