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Can a protein production index optimize land use?

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Can a protein production index optimize land use?

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Presented by Anna Woodhouse MSc, PhD - SP Technical Research Institute of Sweden, at the: Young researchers meeting on multifunctional landscapes, Gothenburg June 7-8, 2016.

Presented by Anna Woodhouse MSc, PhD - SP Technical Research Institute of Sweden, at the: Young researchers meeting on multifunctional landscapes, Gothenburg June 7-8, 2016.

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Can a protein production index optimize land use?

  1. 1. Can a protein production index optimize land use? Anna Woodhouse MSc, PhD SIANI Network young researchers meeting, Gothenburg June 7-8 SP Technical Research Institute of Sweden
  2. 2. Summary Protein Production Index  New methodology- not there yet  Aim to identify a measure that describes how efficiently a food production system utilizes the land to produce protein for human consumption
  3. 3. Introduction  Several issues with land use  Changed the Earths radiative forcing  Main driver of biodiversity degradation  Inappropriate land managament reducing biological production capacity of soil 1 1 Mila I Canals et al., 2007, Key elements in a framework for land use impact assessment within LCA. Int J Life Cycle Assess 12:5–15
  4. 4. Introduction  In Life Cycle Assessment  Land transformation-Land Use Change (LUC)  phase of transformation is relatively short, and the temporal dimension is neglected  Land occupation  land is used in the intended productive way (e.g. arable field)  properties of a piece of land are maintained (e.g. the regrowth of forest is avoided on an arable field)
  5. 5. Introduction  Protein supply for human nutrition- major challenge  Significant environmental impact both animal and vegetable protein  Different resource inputs for different proteins  Ruminants capability to digest roughage feed  Feed produced on pastures-land unsuitable for protein production for human consumption
  6. 6. The problem  m2/kg food is often reported as an indicator of resource use does not capture the difference in land quality used in different food production systems  Simple- similar to water index used in LCA
  7. 7. Protein Production Index (PPI) – How?  Example: Production of 1 kg of chicken protein requires x m2 land in the region of Västra Götaland and y m2 in Matto Grosso in Brazil.  What could have been produced on this land instead?  PPI = 1 kg protein from chicken / X kg protein from alternative production on the land  Need some kind of neutral reference… 7
  8. 8. Protein production Index (PPI) – How? continued  Tried to explore if NPP0 was possible as a neutral reference, NPP0 = ’wild’ net primary production (g C/m2)  Data availability was difficult, difficult to translate to protein  Chosen wholegrain bread as the reference, made from the most common bread crop in the region  Reference in chicken example: bread from winter wheat for land in VGR and bread from corn for the land in Brazil 8
  9. 9. 9
  10. 10. Assumptions  The alternative production is applied to arable land using average crop yields in the region  For land used for grazing on arable and ley the yield is adjusted (average crop yield is lowered by 10%)  Land used for semi-natural pasture grazing is considered not to have an alternative protein production, which ’favours’ milk and beef 10
  11. 11. Results 0 20 40 60 80 100 120 140 160 Bread Chicken filet Minced pork Minced beef Milk Pea soup 'Actual' land use [m2a/kg protein] Seminatural pasture Soybean Ley & cultivated pasture Cropland
  12. 12. Protein Production Index 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Bread Chicken filet Minced pork Minced beef Milk Pea soup Protein index
  13. 13. 13 Pros:  The PPI gives information about land use that takes into account quality of the land Cons:  Using bread as a reference is not 100% objective, and bread is not a common food everywhere in the world (e.g. not in China)  Common reflection is ’why not use a protein crop as the reference? (even more difficult to chose a protein crop objectively in different regions – or perhaps not?) Conclusions
  14. 14. Thank you for your attention!

Editor's Notes

  • How much protein u get from the land for the different products compared to making wholewheat bread from the same land

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