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2.11.2007 Horticultural Systems – from fork to farm © ETH Zürich Strawberries Salomeh Ahmadi Abhari, Diana Niklaus, Daniel Fröhlich.

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Presentation on theme: "2.11.2007 Horticultural Systems – from fork to farm © ETH Zürich Strawberries Salomeh Ahmadi Abhari, Diana Niklaus, Daniel Fröhlich."— Presentation transcript:

1 Horticultural Systems – from fork to farm © ETH Zürich Strawberries Salomeh Ahmadi Abhari, Diana Niklaus, Daniel Fröhlich

2 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 2 2 Overview  Introduction  Consumers  Material and Methods  Results  Conclusion and Discussion  References Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

3 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 3 3 Introduction  Botanical classification: family of Rosaceae  Origin  Romans → cultivation of woodland strawberry (Fragaria vesca) → small fruits  New World → new varieties from north- and southamerica → bigger fruits  Our garden strawberry (Fragaria x ananassa)  Cultivation: soil culture or soilless-cultures  More than 1‘000 varieties with different characteristics Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

4 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 4 4 Consumers  On demand: Taste > without chemical residues > health value But also appearance (brightness, size, colour)  Recent trends: Appearance, storability, transportability, agronomic parameters have been improved  But: Sensory quality hasn’t been improved  Our focus: Link parameters from lab analysis with consumer panels to improve the sensory quality. Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

5 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 5 5 Materials and Methods  Material CodeRetailerPrice per Kg (CHF) Number of strawberries in each batch AMIGROS BCarrefour CCarrefour DPAM Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

6 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 6 6 Materials and Methods  Firmness → Penetrometer  Sugar content → Refractometer  Acidity → pH-Meter (Titration)  Hedonic consumer test with categorisation: Scale of the sensory quality score (SQS) from 1 (very bad) to 9 (excellent). Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

7 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 7 7 Results - Sensory quality scores of different cultivars of strawberries  Significant differences  Variations for 2006 > 2007  2006: Best → MB / Worst → Ma  2007: Best → Ca / Worst → Da Ca=Carezza, Da=Darselect, El=Elsanta, MB=Mara des Bois, Ml=Madeleine, Ma=Marmolada, Pe=Pegasus, Ra=Rauricar Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

8 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 8 8 Results – Consumers vs. Lab analysis  Sugar content ↑ → SQS ↑  Acidity → SQS?  Volatile compounds↑ → SQS↑ CTC 2006 Sensory quality score Soluble solids (°Brix) Titrable acidity Volatile compounds Soluble solids (°Brix) Titrable acidity Volatile compounds Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

9 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 9 9 Results – Our Lab analysis  Firmness ↑ → Acceptability ↑ >>>> Migros is the best  Sugar content: 8 °Brix for good quality >>>> Bad quality same range  Acidity: Highest: Migros and lowest for Carrefour 2 TypeFirmnessSugar contentAcidity Durofel 50SCV°BrixmI NaOHg acid/I juice A B C D Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

10 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 10 Conclusion and Discussion  Sensory quality score can vary from year to year within a cultivar  There’s a positive correlation for both the sugar content and volatile compounds with sensory quality score.  There’s no clear correlation between acidity and sensory quality score.  Measurements in the lab reveals the sugar content is very low due to the fact that they were imported from Spain.  The NIR as a non-destructive method enables to receive results faster and catches more fruit characteristics. Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References

11 ECONOMICS AND MANAGEMENT OF THE AGRI-FOOD CHAIN POLICY INSTRUMENTS FOR SUSTAINABILITY IN ECOSYSTEM SERVICES 8. Mai 2008 Horticultural Systems 11 References  C- Carlen, A. M. P Overview Introduction Consumers Materials and Methods Results Conclusion and Discussion References


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