Articles
DETERMINATION OF PEACH FRUIT RIPENESS THROUGH A NON-DESTRUCTIVE INDEX BASED ON THE VIS/NIR SPECTROSCOPY
Article number
1084_88
Pages
657 – 666
Language
English
Abstract
In peaches, the potential shelf life and the quality at consumption are closely related to the ripeness stage of these fruits at harvest.
Usually, the harvest is based on color, firmness, sugar and acids content of the fruit, although these determinations are carried out through destructive methods and in a limited number of samples.
The technique of Vis/Nir spectroscopy was used for the development of an index, not destructive, based on the difference of absorbance (IDA) between two wavelengths near the absorption peak of chlorophyll-a, and allows monitoring of changes in ripeness processes directly in the field.
The objective of this paper was to track changes in quality that occur along the peach ripeness of Jubileu and Eldorado cultivars and their relationship with non-destructive indexes obtained with the DA-Meter equipment.
The experiment was conducted in the didactic orchard of the Agricultural Center of Palma/ FAEM- UFPel, and fruits were weekly monitored for the evolution of the IDA index from October to December, directly in the field, in the 2010/2011 harvest.
In both cultivars, the IDA index presented similar behavior in during the growing phase of the fruits, but, at ripening, the values for the Jubileu cultivar decreased significantly compared to the Eldorado cultivar.
The IDA index presents significant linear correlation with the quality parameters throughout the period of harvest, being a promising index to assess the ripeness and the quality of peaches directly in the field.
Usually, the harvest is based on color, firmness, sugar and acids content of the fruit, although these determinations are carried out through destructive methods and in a limited number of samples.
The technique of Vis/Nir spectroscopy was used for the development of an index, not destructive, based on the difference of absorbance (IDA) between two wavelengths near the absorption peak of chlorophyll-a, and allows monitoring of changes in ripeness processes directly in the field.
The objective of this paper was to track changes in quality that occur along the peach ripeness of Jubileu and Eldorado cultivars and their relationship with non-destructive indexes obtained with the DA-Meter equipment.
The experiment was conducted in the didactic orchard of the Agricultural Center of Palma/ FAEM- UFPel, and fruits were weekly monitored for the evolution of the IDA index from October to December, directly in the field, in the 2010/2011 harvest.
In both cultivars, the IDA index presented similar behavior in during the growing phase of the fruits, but, at ripening, the values for the Jubileu cultivar decreased significantly compared to the Eldorado cultivar.
The IDA index presents significant linear correlation with the quality parameters throughout the period of harvest, being a promising index to assess the ripeness and the quality of peaches directly in the field.
Publication
Authors
D.L. Betemps, J.C. Fachinello, A. Pretto, L.B. Haas, M. Ernani Prezotto, S. Padilha Galarça
Keywords
peach, chlorophyll, harvest time, infrared
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