บทคัดย่องานวิจัย

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Optimum harvest date study of 4 apple cultivars in southern Poland.

Skrzynski, J.;

COST 94. The postharvest treatment of fruit and vegetables. Determination and prediction of optimum harvest date of apples and pears. Proceedings of a meeting, Lofthus, Norway, 9-10 June 1994. Year: 1996 Pages: 61-66 Ref: 5 ref.

1996

บทคัดย่อ

Optimum harvest date study of 4 apple cultivars in southern Poland.

For 8 years the pace of maturation of the apple cultivars MacSpur, Spartan, Jonathan and Golden Delicious was studied. Each year several maturity parameters were monitored at 5- to 7-day intervals from 5-6 weeks before expected optimum harvest date. For each sampling date F/RS index (firmness/(soluble solids x starch conversion stage)) was calculated. Apples for storage were picked at weekly intervals before, during and after the estimated optimum harvest date. Final quality evaluation and the presence of storage disorders at the end of storage period and after simulated shelf life for 1 week at room temperature were used to judge optimum picking date. Overall, the best quality retention was observed for apples from middle and late harvests. Calculated F/RS values and monitoring of the course of changes over time for studied cultivars indicated optimum picking date with good precision and allowed for some prediction of optimum harvest date. Early and late maturation seasons for these cultivars c

ould be identified after the first 2 measurements in each season.