Nitrogen fertilization but not soil tillage affects nitrous oxide emissions from a clay loam soil under a maize–soybean rotation

TR Number
Date
2011
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract

Denitrification of nitrate fertilizer has been shown to contribute to agricultural nitrous oxide (N2O) emissions. Previous studies have revealed that no-till practices have insignificant or negative impact on nitrogen volatilization of nitrate fertilizers. This study examined the difference in N2O emissions according to tillage practice (mouldboard plough and no-tillage) and mineral nitrogen application rates (0, 80, 160 kg nitrogen per hectare) in a maize-soybean rotation from 2004-2005 in a well-drained humic gleysol. Results indicated that tillage had no effect on nitrogen volatilization rates and denitrification increased linearly with application rate. These results support prior studies’ findings that no-till practices do not impact N2O emissions related to agriculture.

Description
Metadata only record
Keywords
Climate control, Conservation tillage, N2o flux, No-till, Maize, Soybeans, Nitrogen rate, Yield-based n2o emissions, Greenhouse gases, Field Scale
Citation
Soil and Tillage Research 115: 16–26