ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Non-destructive measurement of kiwifruit firmness.

Davie, I. J.; Banks, N. H.; Jeffery, P. B.; Studman, C. J.; Kay, P.;

New Zealand Journal of Crop and Horticultural Science Year: 1996 Vol: 24 Issue: 2 Pages: 151-157 Ref: 12 ref.

1996

บทคัดย่อ

The design and operation of 2 prototypes of an instrument for measuring fruit softness of kiwifruits are described. The instruments were used to measure deformation of the fruit surface beneath a small spherical probe under constant load with time and caused negligible damage to the tested fruit. Softness was quantified as a "softness coefficient", estimated as the slope of the regression line of deformation on the natural logarithm of time. After an initial delay in softening, softness coefficients of kiwifruits increased approximately linearly with time in storage at 0 deg C and were inversely and hyperbolically related to penetrometer data obtained from the same fruits. Repeated measurements on individual fruits, made possible by the non-destructive nature of the softness meter, will enhance control of experimental error in research on fruit softening behaviour.