Articles
THE EFFECT OF DIFFERENT LOW OXYGEN CONTROLLED ATMOSPHERE REGIMES ON THE QUALITY OF APPLES
Article number
485_47
Pages
335 – 340
Language
Abstract
‘Elstar’, ‘Rubin’, ‘Sampion’ and ‘Jonagold’ apples were harvested at optimum maturity for long-term storage.
After cooling samples were stored at 2°C in controlled atmospheres of CO2+O2: 0%+1.5% (Ultra low oxygen ULO), 2%+2% and 5%+3 % (Low oxygen CA) and additionally at 0.03%+21% (normal air). ‘Jonagold’ is a cultivar that has been documented in many countries to have a high storage potential in CA and ULO conditions.
Other cultivars are often considered less suitable for long-term storage because of rapid firmness loss and resulting quality decline.
For ‘Jonagold’, firmness after storage was up to 80 % of initial values and overall quality retention was observed for up to 9 months of storage.
Also there was no incidence of physiological disorders.
For ‘Elstar’ apples good firmness losses were 0.14 kG and eating quality was very acceptable.
Fruits of ‘Rubin’ cultivar after storage in 2+2 retained their quality better than in other studied conditions for 5 months.
Fruit flesh firmness decline over that period occurred at a rate of 0.06-kG per week.
In subsequent months, quality decline was more pronounced but it was possible to maintain marketable quality of ‘Rubin’ apples until the end of June.
Quality of ‘Sampion’ fruits was maintained best by storage at 2+2 or 0+1.5. Firmness decline in these conditions occurred at a rate of 0.06 kG per week during the first five months.
Additional post storage ripening for 7 days at 20°C determined that firmness retention was highest after storage in CA at 0+1.5 and 2+2 for ‘Sampion’ and 2+2 for ‘Rubin’ apples.
After cooling samples were stored at 2°C in controlled atmospheres of CO2+O2: 0%+1.5% (Ultra low oxygen ULO), 2%+2% and 5%+3 % (Low oxygen CA) and additionally at 0.03%+21% (normal air). ‘Jonagold’ is a cultivar that has been documented in many countries to have a high storage potential in CA and ULO conditions.
Other cultivars are often considered less suitable for long-term storage because of rapid firmness loss and resulting quality decline.
For ‘Jonagold’, firmness after storage was up to 80 % of initial values and overall quality retention was observed for up to 9 months of storage.
Also there was no incidence of physiological disorders.
For ‘Elstar’ apples good firmness losses were 0.14 kG and eating quality was very acceptable.
Fruits of ‘Rubin’ cultivar after storage in 2+2 retained their quality better than in other studied conditions for 5 months.
Fruit flesh firmness decline over that period occurred at a rate of 0.06-kG per week.
In subsequent months, quality decline was more pronounced but it was possible to maintain marketable quality of ‘Rubin’ apples until the end of June.
Quality of ‘Sampion’ fruits was maintained best by storage at 2+2 or 0+1.5. Firmness decline in these conditions occurred at a rate of 0.06 kG per week during the first five months.
Additional post storage ripening for 7 days at 20°C determined that firmness retention was highest after storage in CA at 0+1.5 and 2+2 for ‘Sampion’ and 2+2 for ‘Rubin’ apples.
Authors
J. Skrzynski
Keywords
apples, CA refrigerated storage, ULO storage, quality
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