1. Northeast Institute of Geography and Agroecology; Chinese Academy of Sciences; Changchun 130102 PR China
2. Da'an Sodic Land Experiment Station; Chinese Academy of Sciences; Da'an 131317 PR China
3. Key Laboratory of Mollisols Agroecology; Chinese Academy of Sciences; Changchun 130102 PR China
4. School of Agriculture, Food and Wine; The University of Adelaide; Adelaide SA 5064 Australia