In:
Biogeosciences, Copernicus GmbH, Vol. 14, No. 8 ( 2017-04-20), p. 2055-2068
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
1726-4189
DOI:
10.5194/bg-14-2055-2017
DOI:
10.5194/bg-14-2055-2017-supplement
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2017
detail.hit.zdb_id:
2158181-2
