User Tools

Site Tools


wiki:net_fodder_energy_content

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision
Previous revision
wiki:net_fodder_energy_content [2018/07/16 11:58] euracwiki:net_fodder_energy_content [2018/07/18 08:40] (current) sebastian
Line 6: Line 6:
 ==== Input data ==== ==== Input data ====
  
-  * Supply indicator (as calculated in the previous section of this document) * Values on energy content in biomass * Pastures areas * Harvest and transpiration loss estimates+  * Supply indicator (as calculated in the previous section of this document) 
 +  * Values on energy content in biomass * Pastures areas 
 +  * Harvest and transpiration loss estimates
  
 ==== Calculation processes ==== ==== Calculation processes ====
Line 16: Line 18:
 <font 14px/inherit;;inherit;;inherit>**(2) Calculate forage pasture area**</font> <font 14px/inherit;;inherit;;inherit>**(2) Calculate forage pasture area**</font>
  
-  * <font 14px/inherit;;inherit;;inherit>For the calculation of the flow indicator, the land cover delimitations for the local yield estimates can be used.</font> <font 14px/inherit;;inherit;;inherit>However, this data does not allow for distinguishing between meadows and pastures that are grazed or cut and those left barren due to topographical condition and harsh accessibility. Hence, the effective forage extent might differ from the one derived from Corine Land Cover and a hence, a correction based on statistical data on a municipality level might be necessary. For details, please refer to Jäger 2017.</font>+  * <font 14px/inherit;;inherit;;inherit>For the calculation of the flow indicator, the land cover delimitations for the local yield estimates can be used.</font><font 14px/inherit;;inherit;;inherit>However, this data does not allow for distinguishing between meadows and pastures that are grazed or cut and those left barren due to topographical condition and harsh accessibility. Hence, the effective forage extent might differ from the one derived from Corine Land Cover and a hence, a correction based on statistical data on a municipality level might be necessary. For details, please refer to Jäger 2017.</font>
  
 <font 14px/inherit;;inherit;;inherit>**(3) Calculate energy yield at the stock**</font> <font 14px/inherit;;inherit;;inherit>**(3) Calculate energy yield at the stock**</font>
Line 32: Line 34:
   * <font 14px/inherit;;inherit;;inherit>The net yield is the amount of fodder that is actually consumed by livestock. When computing losses from gross yield to net yield, the specific storage and feeding techniques used have a major impact. Losses during storage and feeding account for anywhere between 5% and 40% (Buchgraber 2004, p. 49). Due to the fact that these factors depend on individual farm management, mean values are used to calculate the deduction: as a total mean, 15% will be deducted for all losses.</font>   * <font 14px/inherit;;inherit;;inherit>The net yield is the amount of fodder that is actually consumed by livestock. When computing losses from gross yield to net yield, the specific storage and feeding techniques used have a major impact. Losses during storage and feeding account for anywhere between 5% and 40% (Buchgraber 2004, p. 49). Due to the fact that these factors depend on individual farm management, mean values are used to calculate the deduction: as a total mean, 15% will be deducted for all losses.</font>
  
-{{:en:test_biomass_flow12.jpg?nolink&460x775}}+{{:en:biomass_grassland_flow11.jpg?nolink&450x774}}
  
-{{:en:test_legens.jpg?nolink&1458x866}} +{{:en:test_legens.jpg?nolink&500x297}}
- +
-**Flowchart depicting the procedures used to derive the flow indicator**+
  
 __<font 12px/inherit;;inherit;;inherit>References:</font>__ __<font 12px/inherit;;inherit;;inherit>References:</font>__
wiki/net_fodder_energy_content.1531735091.txt.gz · Last modified: 2018/07/16 11:58 by eurac