ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Predictive model of keeping quality of tomatoes.

Polderdijk, J. J.; Tijskens, L. M. M.; Robbers, J. E.; Valk, H. C. P. M. van der;

Postharvest Biology and Technology Year: 1993 Vol: 2 Issue: 3 Pages: 179-185 Ref: 8 ref.

1993

บทคัดย่อ

A relationship was established between the objectively determined firmness of glasshouse tomatoes and subjective estimates of the keeping quality of the same fruits. The tomatoes were purchased at auctions and consisted mainly of the cultivars Calypso (70%) and Liberto (20%); the remaining 10% included Counter, Spectra and Criterium. Firmness was measured by determining the compression distance of fruits under a force of 3 N. Keeping quality was assessed daily by experienced personnel, and an endpoint was considered to have been reached when the tomatoes were too soft to sell. A multiple linear regression model was calculated using data from 19 sampling weeks. The following expression was established: keeping quality (days at 18 deg C) = -12.6 x compression distance (mm) + b. Included in the intercept b were factors varying with the point in the growing season at which the samples were assessed, such as daylength. Fruit firmness was found to be relatively independent of the temperature of the fr

uit at which this factor was measured. The regression equation accounted for 76% of the variation in keeping quality.