Nutrients: Difference between revisions
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|Reference=Bouwman et al., 2013c; Galloway et al., 2004; Zhang et al., 2010; Diaz and Rosenberg, 2008; UNEP, 2002; Rabalais, 2002; | |Reference=Bouwman et al., 2013c; Galloway et al., 2004; Zhang et al., 2010; Diaz and Rosenberg, 2008; UNEP, 2002; Rabalais, 2002; | ||
|InputVar=Population - grid; GDP per capita - grid; Land cover, land use - grid; Animal stocks; Livestock rations; Manure spreading fraction; Nitrogen deposition - grid; Actual crop and grass production - grid; Production system mix; Fertiliser use efficiency; | |InputVar=Population - grid; GDP per capita - grid; Land cover, land use - grid; Animal stocks; Livestock rations; Manure spreading fraction; Nitrogen deposition - grid; Actual crop and grass production - grid; Production system mix; Fertiliser use efficiency; | ||
|OutputVar= | |OutputVar=NH3 emissions - grid; N and P discharge to surface water - grid; Soil N budget - grid; Soil P budget - grid; N and P in wastewater discharge - grid; | ||
|Description=Human activity has accelerated the Earth’s biogeochemical nitrogen (N) and phosphorus (P) cycles through increasing fertiliser use in agriculture ([[Bouwman et al., 2013c]]). Increased use of N and P fertilisers has raised food production to support the rapidly growing world population, and increasing per capita consumption particularly of meat and milk ([[Galloway et al., 2004]]). | |Description=Human activity has accelerated the Earth’s biogeochemical nitrogen (N) and phosphorus (P) cycles through increasing fertiliser use in agriculture ([[Bouwman et al., 2013c]]). Increased use of N and P fertilisers has raised food production to support the rapidly growing world population, and increasing per capita consumption particularly of meat and milk ([[Galloway et al., 2004]]). | ||
Revision as of 11:06, 1 July 2014
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Key policy issues
- How will the increasing use of fertilisers affect terrestrial and marine ecosystems, with possible consequences for human health?
- To what extent can the negative impacts be reduced by more efficient nutrient management and wastewater treatment, while retaining the positive effects on food production and land productivity?