Policy intervention figure Nutrients: Difference between revisions
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|Caption=. Effect of five policy interventions on the global soil budget for 2050 relative to a baseline scenario: (1) EX (extensification) assumes that 10% of ruminant production in mixed and industrial systems is shifted to pastoral production systems. (2) FE (increased feed conversion efficiency) assumes a 10% lower N and P excretion for cattle, pigs, poultry and small ruminants in mixed and industrial systems. This is achieved by tuning the feed composition and increasing the use of concentrates. (3) ST (improved manure storage systems), considers 20% lower NH3 emissions from animal housing and storage systems. This means that the animal manure that is used for spreading contains 5% more N than in the baseline scenario. (4) IM (integrated manure management) assumes that all manure that in the baseline scenario ends up outside the agricultural system (e.g. manure used as fuel (Figure 1 ), is recycled in crop systems; this allows for substituting fertilizser. In addition, there is improved integration of animal manure in crop systems, particularly in industrializsed countries. (5) DI (diet) assumes that by 2050 10% of the baseline scenario’s beef consumption is replaced by poultry meat in all producing regions, without accounting for changes in agricultural trade. Extensification, increased feed efficiency and reduction ofin ammonia emissions from stables (cases 1, 2 and 3) have minor effects on the global soil N budget. However better integration of animal manure in crop production systems, primarily in industrializsed countries, and a change in human diets with poultry replacing ruminant meat, have major effects on the global soil N budget. Source:Bouwman et al., 2011 #652]. | |Caption=. Effect of five policy interventions on the global soil budget for 2050 relative to a baseline scenario: (1) EX (extensification) assumes that 10% of ruminant production in mixed and industrial systems is shifted to pastoral production systems. (2) FE (increased feed conversion efficiency) assumes a 10% lower N and P excretion for cattle, pigs, poultry and small ruminants in mixed and industrial systems. This is achieved by tuning the feed composition and increasing the use of concentrates. (3) ST (improved manure storage systems), considers 20% lower NH3 emissions from animal housing and storage systems. This means that the animal manure that is used for spreading contains 5% more N than in the baseline scenario. (4) IM (integrated manure management) assumes that all manure that in the baseline scenario ends up outside the agricultural system (e.g. manure used as fuel (Figure 1 ), is recycled in crop systems; this allows for substituting fertilizser. In addition, there is improved integration of animal manure in crop systems, particularly in industrializsed countries. (5) DI (diet) assumes that by 2050 10% of the baseline scenario’s beef consumption is replaced by poultry meat in all producing regions, without accounting for changes in agricultural trade. Extensification, increased feed efficiency and reduction ofin ammonia emissions from stables (cases 1, 2 and 3) have minor effects on the global soil N budget. However better integration of animal manure in crop production systems, primarily in industrializsed countries, and a change in human diets with poultry replacing ruminant meat, have major effects on the global soil N budget. Source:Bouwman et al., 2011 #652]. | ||
|FigureType=Policy intervention figure | |FigureType=Policy intervention figure | ||
|Component=Nutrients; | |Component=Nutrients; | ||
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