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Chinese Journal of Applied Ecology ›› 1998, Vol. 9 ›› Issue (2): 168-170.

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Effect of inhibitors and their combination on the behavior and fate of urea 15N in wheat soil system

Shi Yi1, Xu Xingkai1, Zhou Likai1, Oswald Van Cleemput2   

  1. 1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015;
    2. Laboratory of Applied Physical Chemistry, Faculty of Agricultural and Applied Biological Sciences, University of Ghent, B-9000 Ghent, Belgium
  • Received:1997-08-27 Revised:1997-10-20 Online:1998-03-25 Published:1998-03-25

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Abstract: With the applications of labeled 15N-Nurea plus hydroquinone, dicyandiamide and their combination, a pot experiment with spring wheat was conducted. The result shows that at the end of growing season, the plant recovery, the remainder in soil and the loss occupied 17.65～23.69 %, 43.72～56.32% and 19.99～36.77% of applied urea N, respectively. In comparison with applying urea alone, a combined application of hydroquinone and dicyandiamide induced a 16.78% higher total recovery and 5.96% higher plant recovery. The application of urea had a greatest contribution to the Ncontent of wheat grain, being43.3～62.0% of the 15N Nuptake of whole plant.

Key words: Labeled 15N-urea, Inhibitors, Spring wheat, Fate of urea N