ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effects of cooling by over-tree sprinkler irrigation on fruit color and firmness in 'Sensation Red Bartlett' pear.

Dussi, M. C.; Sugar, D.; Azarenko, A. N.; Righetti, T. L.;

HortTechnology Year: 1997 Vol: 7 Issue: 1 Pages: 55-57 Ref: 15 ref.

1997

บทคัดย่อ

Over-tree sprinkler irrigation cooling treatments were applied to Sensation Red Bartlett pear trees growing in Medford, Oregon, USA, during the final 30 days of fruit maturity in 1992 and 1993 when orchard air temperatures were >29 deg C. Fruits from cooled trees were more red and less yellow than fruits from non-cooled trees, resulting in lower hue values by the middle of the harvestable maturity period in both years. In 1992, cooled fruits had a greater portion of the fruit surface covered with red blush than fruits that were not cooled. Fruit firmness decreased more rapidly in fruits from cooled trees than in those from non-cooled trees, indicating advanced maturity. It was concluded that cooled fruits should be harvested earlier than non-cooled fruits to maintain postharvest quality. Differences between cooled and non-cooled fruits with respect to hue, surface blush and rate of firmness loss were more pronounced in 1992 (a warm season requiring cooling on 15 of the 30 days) than in 1993 (a c

ooler season requiring cooling on only 7 days).