Livestock systems/Policy issues: Difference between revisions

Revision as of 15:54, 10 February 2014

Parts of Livestock systems/Policy issues

Component is implemented in:

IMAGE land management model (version IMAGE land management 3.2)

Components:

Related IMAGE components

Projects/Applications

Models/Databases

MAGNET model

Key publications

Bouwman et al., 2005

Flowchart Livestock systems. See also the Input/Output Table on the introduction page.

@@ Line 1: / Line 1: @@
 {{ComponentPolicyIssueTemplate
-|Description=Global grass consumption has increased by more than 40% between 1970 and 2010 (see figure below), and global grassland area has slowly increased from 3134 to 3313 million hectares (about 5%) between 1970 and 2010 (see the figure in the policy intervention example section). The global area of extensively used pastoral grassland and mixed systems shows slight and gradual changes. Production characteristics of extensive pastoral production systems have not changed much, whereas those of mixed and industrial systems have been changing rapidly, with trends towards intensification. For the future, most baseline scenarios indicate that, in the coming decades, a similar increase in grass production is required as observed historically. Under the baseline scenario from the [[Roads from Rio+20 (2012) project |Rio+20]] study, these developments result in a slow increase of 2% in global grassland area (see figure below). This slower increase than observed historically is mostly caused by a slower growth in consumption.
+|Description=Baseline developments: Global grass consumption increased by more than 40% between 1970 and 2010 (see figure below), while global grassland area only increased about 5% from 3134 to 3313 million hectares in the same period (see the figure in the policy intervention example section). The global area of extensively used pastoral grassland only shows slight and gradual changes.
-Several different economic developments and policy interventions mat change the baseline trend. For example, an increasing demand for ruminant meat may increase the required amount of grassland.  Climate change may change grassland productivity, which will also have its effect on the grassland area that is required.
+While extensive pastoral production systems have changed little, mixed and industrial systems have moved rapidly towards intensification. Most baseline scenarios indicate a similar increase in grass production is required over the coming decades to that observed historically. Under the baseline scenario from the [[Roads from Rio+20 (2012) project |Rio+20]] study, these developments result in a small increase of 2% in global grassland area (see figure below). This smaller increase than observed historically is attributed to slower growth in consumption.
-In addition, several characteristics of production systems may change grassland development.
+|Example=All such interventions have been combined in the Global Technology (GT) scenario of the Rio+20 study,  resulting in more production in mixed systems (+10%), higher carcass weights (+10%), higher off-take rates (+10%), more efficient feed conversion by sheep and goats (+10%), more feed crops (15%) and higher grazing intensities (15%). This package leads to a considerable reduction in grassland area of about 15% compared to the baseline scenario for 2050  (see the figure in the baseline scenario section), leaving more area for biodiversity recovery.
-|Example=In the so-called Global Technology (GT) scenario of the Rio+20 study, all such interventions have been combined, resulting in more production in mixed systems (+10%), larger carcass weights (+10%), higher off-take rates (+10%), more efficient feed conversion of sheep and goats (+10%), more feed crops (15%) and higher grazing intensities (15%). When included in the baseline scenario, this package leads to a considerable reduction in grassland area – by about 15% compared to the baseline scenario for 2050 (see the figure in the baseline scenario section). This then also leads to an increase in the area where biodiversity may develop.
 }}

Livestock systems/Policy issues: Difference between revisions

Revision as of 15:54, 10 February 2014

Navigation menu

Search