College of Resources and Environmental Sciences Key Laboratory of North China Crop Improvement and Regulation Laboratory for Farmland Eco-Environment of Hebei Agricultural University 071001.;
College of Resources and Environmental Sciences Academy of Agriculture Green Development Laboratory of Plant-Soil Interactions(Ministry of Education) Agricultural University 100193;
Rural Energy and Environment Agency of Agriculture and Rural Affairs 100125.;
Key Laboratory of Nonpoint Pollution Control(Ministry of Agriculture and Rural Affairs) of Agricultural Resources and Regional Planning Academy of Agricultural Sciences 100081;
Heze Kingenta Ecological Engineering Co.. 274000;
Key Laboratory of Agro-environment in Downstream of Yangtze Plain(Ministry of Agriculture and Rural Affairs) Academy of Agricultural Sciences 210014.;
nitrogen; loss from soil; transformation; farm field scale; watershed scale;