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Evolution of postharvest maturity of tomatoes grown on different substrates: non-destructive firmness and colour measurements.

Author(s) : BUSSCHER R. de, VANDEWALLE X., SCHREVENS E., BAERDEMAEKER J. de

Summary

The quality evolution of tomatoes grown under different conditions was monitored during storage by non-destructive measurements of firmness and colour. Firmness is measured using the acoustic impulse response technique and the colour distribution information was obtained from digitised video images. Three different hydroponic growing systems, namely: nutrient film technique, rockwool and polyurethane were used. The saturated moisture content of the rockwool and polyurethane substrate were monitored and controlled (70% moisture content on volume basis for the rockwool, 50% for polyurethane) on the basis of thermal conductivity measurements of the substrate. A second experiment with actively controlled water supply, was set up using the Active Drain System combined with thermal conductivity sensing. Tomatoes grown under saturated (70-80% volume) and 30% moisture content on volume basis were compared for firmness and colour evolution after picking. Results are given.

Details

  • Original title: Evolution of postharvest maturity of tomatoes grown on different substrates: non-destructive firmness and colour measurements.
  • Record ID : 1996-2924
  • Languages: English
  • Source: The post-harvest treatment of fruit and vegetables. Quality criteria. Proceedings COST 94.
  • Publication date: 1994/04/19
  • Document available for consultation in the library of the IIR headquarters only.

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