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http://dx.doi.org/10.11626/KJEB.2019.37.3.309

Effect of no-tillage and green manure practices on the nitrous oxide emission from cropland  

Lee, Sun-Il (National Institute of Agricultural Sciences, RDA)
Kim, Gun-Yeob (National Institute of Agricultural Sciences, RDA)
Lee, Jong-Sik (National Institute of Agricultural Sciences, RDA)
Choi, Eun-Jung (National Institute of Agricultural Sciences, RDA)
Publication Information
Korean Journal of Environmental Biology / v.37, no.3, 2019 , pp. 309-316 More about this Journal
Abstract
Cropland is a major source of atmospheric nitrous oxide (N2O) and we need technologies in the field of agriculture that can reduce the presence of N2O. In this study, a field experiment encompassing six treatments was conducted to determine the efflux of N2O in cropland during the growing season. An experimental plot was composed of two main sectors, no-tillage (NT) and conventional tillage (CT), which were subdivided into three plots according to types of nitrogen (N) sources: CF, chemical fertilizer; HV, hairy vetch+chemical fertilizer; and RY, rye+chemical fertilizer. The cumulative N2O emissions were 179.8 mg N2O m-2 for CF-CT, 108.1 mg N2O m-2 for HV-CT, 303.5 mg N2O m-2 for RY-CT, 86.7 mg N2O m-2 for CF-NT, 73.8 mg N2O m-2 for HV-NT, and 122.7 mg N2O m-2 for RY-NT during the fallow season. The CT, HV, and RY of no-tilled soils were reduced by 51.8, 31.7 and 59.6%, respectively (p<0.001). Our results indicate that the use of no-tillage and hairy vetch practice rather than conventional tillage and chemical fertilizer practice can decrease N2O emission.
Keywords
cropland; green manure; nitrous oxide; no-tillage;
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