Jiangsu Key Laboratory of Agricultural Meteorology;
Nanjing University of Information Science&Technology;
Nanjing 210044;
China;
Department of Agricultural Resources and Environment;
Nanjing University of Information Science&Technology;
Nanjing 210044;
China;
gross N transformation rates; 15N tracing; N2O emission sources; sandy loam; silt loam; semi-arid region;