บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Modified atmosphere packaging of fresh table grape cultivars grown in eastern United States.

Elboudwarej, Fakher

Ph.D. Thesis., Michigan State University, 1991, 189 pages

1991

บทคัดย่อ

MODIFIED ATMOSPHERE PACKAGING OF FRESH TABLE GRAPE CULTIVARS GROWN IN EASTERN UNITED STATES (GRAPES).

The effects of girdling, gibberellin application and combination treatments on postharvest storage life of 'Himrod' table grapes at 0circC were investigated.  In addition, two postharvest treatments were examined including modified atmosphere packaging with and without humidity control.  For the postharvest treatment studies 3 additional cultivars were included, 'Vanessa', 'Concord', and 'Alden' in addition to 'Himrod'.

 To study effects of girdling, gibberellin and combination treatments on postharvest behavior of the 'Himrod' grape cultivar, grape clusters from field treated vines were sealed in polymeric packages and stored at 0circC.  Grapes in packages were evaluated for surface mold and general appearance at different durationsIn general, grapes that were harvested from girdled vines had poor storage life compared to controls.

 Reducing O2 to 2% and raising CO2 to 7-10% using modified atmosphere packaging extended shelflife of 'Himrod' and 'Concord' grapes 40 and 70 days, respectively, beyond that of control grapes, which were in unsealed packages.  'Alden' grape fruit did not respond favorably to the low O2/high CO2 environment compared to unsealed controls.

 Maintaining humidity generated by KNO3 and KCl, in sealed polymeric packages reduced decay of most cultivars without determinental moisture loss compared to controls.  The relative humidity at 20circC was approximately 89 and 87% for KNO3 and KCl, respectively.  Again, 'Alden' was the only cultivar that did not respond well to modified humidity control in sealed packages.