Key Laboratory of Plant Nutrition and Fertilizer;
Ministry of Agriculture;
Institute of Agricultural Resources and Regional Planning;
Chinese Academy of Agricultural Sciences;
Beijing100081(China);
Graduate School;
Chinese Academy of Agricultural Sciences;
Beijing 100081(China);
Soil and Fertilizer Institute;
Qinghai Academy of Agriculture and Forestry Sciences;
Qinghai University;
Xining 810016(China);
Institute of Soil&Fertilizer and Resource&Environment;
Jiangxi Academy of Agricultural Sciences;
Nanchang 330200(China);
Scotland's Rural College(SRUC);
Edinburgh EH93JG(UK);
Texas A&M AgriLife Research Center at Beaumont;
Texas 77713(USA);
active C and N pools; C/N ratio; global warming potential; greenhouse gas; plant residues; straw returning;