Nutrients/Policy issues: Difference between revisions
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* Substituting synthetic fertilisers with fertilisers produced from human excreta. This option has no consequences for nutrient budgets, but reduces wastewater flows. | * Substituting synthetic fertilisers with fertilisers produced from human excreta. This option has no consequences for nutrient budgets, but reduces wastewater flows. | ||
IMAGE also addresses strategies for reducing nutrient surpluses in agriculture, including the five options illustrated in | IMAGE also addresses strategies for reducing nutrient surpluses in agriculture, including the five options illustrated in the figure below: | ||
* Extensification (EX), assuming for example that 10% of ruminant production in mixed and industrial systems shifts to pastoral production systems. | * Extensification (EX), assuming for example that 10% of ruminant production in mixed and industrial systems shifts to pastoral production systems. | ||
* Increased feed conversion efficiency (FE), assuming for example 10% reduction in N and P excretion for cattle, pigs, poultry and small ruminants in mixed and industrial systems. This is achieved by increasing the use of concentrates. | * Increased feed conversion efficiency (FE), assuming for example 10% reduction in N and P excretion for cattle, pigs, poultry and small ruminants in mixed and industrial systems. This is achieved by increasing the use of concentrates. | ||
* Improved manure storage systems (ST), considering for example 20% lower NH3 emissions from animal housing and storage systems. This means that the animal manure used for spreading contains 5% more N than under the baseline scenario. | * Improved manure storage systems (ST), considering for example 20% lower NH3 emissions from animal housing and storage systems. This means that the animal manure used for spreading contains 5% more N than under the baseline scenario. | ||
* Integrated manure management (IM) where, for example, all manure under the baseline scenario ends up outside the agricultural system (e.g., manure used as fuel, see | * Integrated manure management (IM) where, for example, all manure under the baseline scenario ends up outside the agricultural system (e.g., manure used as fuel, see the figure 6.4.1) and is recycled in crop systems to substitute fertiliser. In addition, integration of animal manure in crop systems is improved, particularly in industrialised countries. | ||
* Dietary changes (DI), for example, assume that by 2050, 10% of beef consumption under the baseline scenarios is replaced by poultry meat in all producing regions, without accounting for changes in agricultural trade. | * Dietary changes (DI), for example, assume that by 2050, 10% of beef consumption under the baseline scenarios is replaced by poultry meat in all producing regions, without accounting for changes in agricultural trade. | ||
Revision as of 09:16, 24 June 2014
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