College of Natural Resources and Environment;
Northwest A&F University/State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau;
Institute of Water and Soil Conservation;
Chinese Academy of Science and Ministry of Water Resources;
Yangling 712100;
China;
Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China;
Ministry of Agriculture;
Yangling 712100;
Chin;
Biolog-Eco microplate; nitrogen fertilizer; microbial community; organic agriculture; straw decomposition;