1Department of Soil Science, Punjab Agricultural University, Ludhiana-141004
2Faculty of Land and Food Systems, University of British Columbia, Vancouver, Canada
*Corresponding author: harman.dhadli@pau.edu
Online published on 18 September, 2015.
Effect of crop growth and weather variables on temporal variations in soil CO2 emissions in the maize and wheat crop seasons, from N-fertilized soils and without any fertilizer input, were studied in a field experiment. CO2 fluxes were estimated using closed chambers and gas chromatography. Daily CO2 fluxes varied from 4.7 to 9.4 CO2-C ha−1day−1 in the maize crop season and 2.4 to 6.4 CO2-C ha−1day−1 in the wheat crop season. Total emissions during vegetative stages were higher as compared to other stages, for both maize and wheat crops. Study revealed that seasonal fluctuations in CO2 fluxes were controlled by soil moisture and temperature, and when these were optimum, emissions were also related to N-fertilization.
CO2 emission, Maize, N-fertilization, Weather, Wheat
