Spatiotemporal dynamics of soil phosphorus and crop uptake in global cropland during the twentieth century
Jie Zhang1, Arthur H. W. Beusen2,3, Dirk F. van Apeldoorn2,4, José M. Mogollón2, Chaoqing Yu1, and Alexander F. Bouwman2,31Department of Earth System Science, Tsinghua University, Beijing, 100084, China 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 4Department of Plant Sciences, Wageningen University, P.O. Box 430, 6700 AK Wageningen, The Netherlands
Received: 13 Dec 2016 – Accepted for review: 27 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 pools and crop P uptake, using a 0.5 by 0.5 degree spatially explicit model for the period 1900–2010. The simulated country-scale crop P uptake agrees well with historical P uptake. 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. 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. This comprehensive and spatially explicit model can be used to assess the dynamics of soil P inventories, which serve as indicators for soil fertility and productivity.
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 twentieth century, Biogeosciences Discuss., doi:10.5194/bg-2016-543, in review, 2017.