机译:长期施肥对华北平原土壤生产力的影响
Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Ya'an 625014 China;
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;
Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Ya'an 625014 China;
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;