Nitrous Oxide and Carbon Dioxide Emissions During the Nongrowing Season from Manured Soils under Rainfed and Irrigated Conditions.

Hao, X. (2015). "Nitrous Oxide and Carbon Dioxide Emissions During the Nongrowing Season from Manured Soils under Rainfed and Irrigated Conditions.", Geomicrobiology Journal, 32(7), pp. 648-654. doi : 10.1080/01490451.2014.920940  Access to full text

Abstract

This study investigated CO2 and N2O emissions from soil receiving long-term cattle feedlot manure applications under rainfed and irrigated conditions in semi-arid southern Alberta, Canada. Soil available N and CO2 and N2O fluxes were measured after fall crop harvesting and prior to next spring's seeding from plots that had received 0 and 60 t ha-1yr-1 cattle feedlot manure application with (Mi0 and Mi60) or without irrigation (Mr0 and Mr60) for 27 years. Both CO2 and N2O fluxes varied considerably over the 7-month nongrowing season. Cumulative CO2 emissions from manured treatments (Mr60 at 2.20 t ha-1 and Mi60 at 2.36 t ha-1) were 2.6 times values from nonmanured treatments (Mr0 at 0.83 t ha-1 and Mi0 at 0.92 t ha-1). Similarly, cumulative N2O emission from manured treatments (Mr60 at 4.54 kg ha-1 and Mi60 at 5.34 kg ha-1) were 8–12 times values from nonmanured treatments (Mr0 at 0.40 kg ha-1 and Mi0 at 0.70 kg ha-1). Growing season irrigation had no effect on CO2 and N2O emission over the nongrowing season.

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