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이종은,연여욱,이진일,남연규,김건엽,김선주 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.1
Generally, nitrogen (N) fertilization higher than the recommended dose is applied during vegetable cultivationfor increasing in productivity. However, excessive N application rate beyond plant requirement could causeadverse environmental impact such as nitrate leaching and nitrous oxide emission. In this experiment, theimpacts of N fertilization was studied on nitrous oxide (N2O) emission to standardize the optimum fertilizationlevel for minimizing of N2O emission as well as most of the crop productivity. Herein, we assessed the N2Oemission in the flat upland soil which was cultivated with different N application rates on red pepper for 3years (2010∼2012). N2O emission was measured in chemical N fertilizer amounts 0 (N 0), 95 (N 0.5), 190 (N1.0), 380 (N 2.0) kg ha-1 by using the abnormal shape chamber closed repeating three times. In average for 3years, the total N2O emissions of each treatment in field of soybean were 2.110 (N 0), 3.165 (N 0.5), 5.039 (N1.0), and 7.228 (N 2.0) kg N2O ha-1 yr-1, respectively. And then the primary regression between nitrogenfertilizer amount and the total N2O emission was showed as y = 0.0138x + 2.0942 (r2=0.9885), and an averageof the emission factor was EF1 0.0148(0.0118∼0.0191) N2O-N kg N-1 kg-1 from 2010 to 2012. The result wasa little higher than the emission default of the IPCC 1996 Guideline (EF1 0.0125) when the results areconverted into N2O emission factor.
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