1. Anhui Province Key Lab of Farmland Ecological Conservation and Pollution PreventionResearch Centre of Phosphorus Efficient Utilization and Water Environment Protection along the Yangtze River Economic BeltSchool of Resources and EnvironmentAnhui Agricultural University Hefei China
2. College of Resources and Environmental SciencesNanjing Agricultural University Nanjing Jiangsu China
3. School of EnvironmentTsinghua University Beijing China
4. Department of Earth and Atmospheric SciencesUniversity of Alberta Edmonton AB Canada