Environmental Monitoring and Assessment

, Volume 77, Issue 2, pp 163–178

Emission of Nitrous Oxide from Rice-Wheat Systems of Indo-Gangetic Plains of India

Authors

    • Division of Environmental Sciences, Nuclear Research Laboratory (NRL) BuildingIndian Agricultural Research Institute
  • Arti Bhatia
    • Division of Environmental Sciences, Nuclear Research Laboratory (NRL) BuildingIndian Agricultural Research Institute
  • Shiv Prasad
    • Division of Environmental Sciences, Nuclear Research Laboratory (NRL) BuildingIndian Agricultural Research Institute
  • Shalini Singh
    • Division of Environmental Sciences, Nuclear Research Laboratory (NRL) BuildingIndian Agricultural Research Institute
  • S. Kumar
    • Division of Environmental Sciences, Nuclear Research Laboratory (NRL) BuildingIndian Agricultural Research Institute
  • M. C. Jain
    • Division of Environmental Sciences, Nuclear Research Laboratory (NRL) BuildingIndian Agricultural Research Institute
  • U. Kumar
    • Division of Environmental Sciences, Nuclear Research Laboratory (NRL) BuildingIndian Agricultural Research Institute
Article

DOI: 10.1023/A:1015823919405

Cite this article as:
Pathak, H., Bhatia, A., Prasad, S. et al. Environ Monit Assess (2002) 77: 163. doi:10.1023/A:1015823919405

Abstract

Nitrous oxide (N2O) accounts for 5%of the total enhanced greenhouse effect and responsiblefor the destruction of the stratospheric ozone. The rice-wheat cropping system occupying 26 million ha ofproductive land in Asia could be a major source ofN2O as most of the fertilizer N in this region isconsumed by this system. Emission of N2O asinfluenced by application of urea, urea plus farm yardmanure (FYM), and urea plus dicyandiamide (DCD), anitrification inhibitor, was studied in rice-wheatsystems of Indo-Gangetic plains of India. Total emissionof N2O-N from the rice-wheat systems varied between654 g ha-1 in unfertilized plots and 1570 g ha-1 in urea fertilized plots. Application of FYM and DCDreduced emission of N2O-N in rice. The magnitude ofreduction was higher with DCD. In wheat also N2O-Nemission was reduced by DCD. FYM applied in rice had noresidual effect on N2O-N emission in wheat. In riceintermittent wetting and drying condition of soilresulted in higher N2O-N emission than that ofsaturated soil condition. Treatments with 5 irrigationsgave higher emissions in wheat than those with 3irrigations. In rice-wheat system, typical of a farmer'sfield in Indo-Gangetic plains, where 240 kg N isgenerally applied through urea, N2O-N emission is1570 g ha-1 (0.38% of applied N) and application ofFYM and DCD reduced it to 1415 and 1096 g ha-1,respectively.

dicyandiamide (DCD)farm yard manuremoistureregimenitrification inhibitornitrous oxide emissionrice-wheat systemsurea
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© Kluwer Academic Publishers 2002