1Department of Earth System Science, Tsinghua University, Beijing,
2Department of Earth Sciences-Geosciences, Faculty of Geosciences,
Utrecht University, P.O. Box 80021, 3508 TA Utrecht, the Netherlands
3PBL Netherlands Environmental Assessment Agency, P.O. Box 30314, 2500
GH The Hague, the Netherlands
4Farming Systems Ecology, Wageningen University, P.O. Box 430, 6700 AK
Wageningen, the Netherlands
Received: 13 Dec 2016 – Discussion started: 04 Jan 2017
Abstract. Phosphorus (P) plays a vital role in global crop production and food security. In this study, we investigate the changes in soil P pool inventories calibrated from historical countrywide crop P uptake, using a 0.5-by-0.5° spatially explicit model for the period 1900–2010. Globally, the total P pool per hectare increased rapidly between 1900 and 2010 in soils of Europe (+31 %), South America (+2 %), North America (+15 %), Asia (+17 %), and Oceania (+17 %), while it has been stable in Africa. Simulated crop P uptake is influenced by both soil properties (available P and the P retention potential) and crop characteristics (maximum uptake). Until 1950, P fertilizer application had a negligible influence on crop uptake, but recently it has become a driving factor for food production in industrialized countries and a number of transition countries like Brazil, Korea, and China. This comprehensive and spatially explicit model can be used to assess how long surplus P fertilization is needed or how long depletions of built-up surplus P can continue without affecting crop yield.
Revised: 15 Mar 2017 – Accepted: 17 Mar 2017 – Published: 20 Apr 2017
Zhang, J., Beusen, A. H. W., Van Apeldoorn, D. F., Mogollón, J. M., Yu, C., and Bouwman, A. F.: Spatiotemporal dynamics of soil phosphorus and crop uptake in global cropland during the 20th century, Biogeosciences, 14, 2055-2068, doi:10.5194/bg-14-2055-2017, 2017.