Nutrients: Difference between revisions
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m (Text replace - "Livestock ration" to "Livestock rations") |
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|KeyReference=Bouwman et al., 2013a; Bouwman et al., 2009; Van Drecht et al., 2009; Morée et al., 2013; | |KeyReference=Bouwman et al., 2013a; Bouwman et al., 2009; Van Drecht et al., 2009; Morée et al., 2013; | ||
|Reference=Bouwman et al., 2013ab; Galloway et al., 2004; Zhang et al., 2010; Diaz and Rosenberg, 2008; UNEP, 2002; Rabalais, 2002; | |Reference=Bouwman et al., 2013ab; 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 stock; Livestock | |InputVar=Population - grid; GDP per capita - grid; Land cover, land use - grid; Animal stock; Livestock rations; Manure spreading fraction; Nitrogen deposition - grid; Actual crop and grass production - grid; Production system mix; Fertilizer use efficiency; | ||
|OutputVar=NH3 emission - grid; N and P discharge to surface water; Soil N budget - grid; Soil P budget - grid; Wastewater N and P discharge - grid; | |OutputVar=NH3 emission - grid; N and P discharge to surface water; Soil N budget - grid; Soil P budget - grid; Wastewater N and P 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., 2013ab]]). 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]]). Increased fertiliser use has contributed to ongoing increases in crop yields. | |Description=Human activity has accelerated the Earth’s biogeochemical nitrogen (N) and phosphorus (P) cycles through increasing fertiliser use in agriculture ([[Bouwman et al., 2013ab]]). 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]]). Increased fertiliser use has contributed to ongoing increases in crop yields. | ||
Revision as of 14:20, 24 April 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?