Residual soil phosphorus as the missing piece in the global phosphorus crisis puzzle
| Autor: | Ken E. Giller, Martin K. van Ittersum, Alexander F. Bouwman, S.Z. Sattari |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Crops
Agricultural Conservation of Natural Resources Aardwetenschappen chemistry.chemical_element perspective engineering.material Residual Earth System Science nitrogen Crop Soil balances Animals Humans Production (economics) Ecosystem dairy farming system Multidisciplinary global crop production Phosphorus food security Biological Sciences PE&RC Manure term crop response Plant Production Systems Phosphorite chemistry Agronomy hysteresis Plantaardige Productiesystemen fertilizer phosphorus engineering Leerstoelgroep Aardsysteemkunde Environmental science Fertilizer phosphorus depletion |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America 109 (2012) 16 Proceedings of the National Academy of Sciences of the United States of America, 109(16), 6348-6353 Proceedings of the National Academy of Sciences of the United States of America, 109, 6348. National Academy of Sciences |
| ISSN: | 0027-8424 1091-6490 |
| Popis: | Phosphorus (P) is a finite and dwindling resource. Debate focuses on current production and use of phosphate rock rather than on the amounts of P required in the future to feed the world. We applied a two-pool soil P model to reproduce historical continental crop P uptake as a function of P inputs from fertilizer and manure and to estimate P requirements for crop production in 2050. The key feature is the consideration of the role of residual soil P in crop production. Model simulations closely fit historical P uptake for all continents. Cumulative inputs of P fertilizer and manure for the period 1965–2007 in Europe (1,115 kg⋅ha −1 of cropland) grossly exceeded the cumulative P uptake by crops (360 kg⋅ha −1 ). Since the 1980s in much of Europe, P application rates have been reduced, and uptake continues to increase due to the supply of plant-available P from residual soil P pool. We estimate that between 2008 and 2050 a global cumulative P application of 700–790 kg⋅ha −1 of cropland (in total 1,070–1,200 teragrams P) is required to achieve crop production according to the various Millennium Ecosystem Assessment scenarios [Alcamo J, Van Vuuren D, Cramer W (2006) Ecosystems and Human Well-Being: Scenarios, Vol 2, pp 279–354]. We estimate that average global P fertilizer use must change from the current 17.8 to 16.8–20.8 teragrams per year in 2050, which is up to 50% less than other estimates in the literature that ignore the role of residual soil P. |
| Databáze: | OpenAIRE |
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