บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Quality of 'Buerre Bosc' and 'Doyenne du Comice' pears in relation to harvest date and storage period.

Elgar, H. J.; Watkins, C. B.; Murray, S. H.; Gunson, F. A.;

Postharvest Biology and Technology Year: 1997 Vol: 10 Issue: 1 Pages: 29-37 Ref: 15 ref.

1997

บทคัดย่อ

Quality of 'Buerre Bosc' and 'Doyenne du Comice' pears in relation to harvest date and storage period.

Fruits from 2 winter pear cultivars, Buerre Bosc [Beurre Bosc] and Doyenne du Comice, were harvested during maturation at weekly intervals during 1993 and 1994 at Havelock North, Hawkes Bay, North Island, New Zealand, and stored for 0, 2, 4, 6, 8, 12, 16 or 20 weeks at -0.5 deg C, followed by one week at 20 deg . During ripening, fruits of the 2 cultivars showed distinctly different patterns of ethylene production after chilling. Ethylene production of Buerre Bosc fruits followed typical climacteric patterns and generally exhibited progressively higher rates with longer storage. Ethylene production of Doyenne du Comice fruits increased with longer storage when initially transferred to higher temperature, but tended to decline during the ripening period. Ripening of fruits of both cultivars, as judged by physical measurements, was affected by harvest date and storage period. Early-harvested fruits required longer periods of storage (6 weeks) before reaching full ripeness than late-harvested fruit

s (2 weeks). Fruits still retained the ability to ripen fully after 20 weeks of storage. Extractable juice contents and titratable acidity concentrations of ripened fruits decreased with increasing storage, but these changes were less pronounced and occurred later than changes in flesh firmness and background colour. Sensory analyses indicated that harvest date only affected eating quality of Doyenne du Comice fruits. Fruits stored for 4-8 weeks generally had the highest flavour intensity, juiciness and overall quality. The results indicate that Buerre Bosc fruits should be stored for a minimum of 4 weeks depending on harvest date, and best quality is obtained between 4 and 12 weeks after harvest. In contrast, optimum quality of Doyenne du Comice fruits occurred between 8 and 20 weeks after harvest.