POTENTIAL OF NEAR INFRARED SPECTROSCOPY FOR NON-DESTRUCTIVE ESTIMATION OF SOLUBLE SOLIDS IN GROWING MELONS
Non-destructive determination of soluble solids (○Brix) in harvested fruits using near infrared (hereafter, NIR) spectroscopy has been reported by many researchers. We have just reported on non-destructive estimation of ○Brix in harvested melons using a NIRSystems Model 6500 spectrophotometer (Ito et al., 2000). There is a cultivated variety that is difficult to judge harvest time from external appearance. If we can determine ○Brix in growing fruits non-destructively in the field, immature fruits will not be harvested. A portable NIR spectrophotometer for field use has been just developed by Kubota Corporation. The spectral data of growing melons in a plastic greenhouse were measured by the portable spectrophotometer. A commercial program was used for multiple linear regression analysis. ○Brix in the growing melons could be estimated by a multiple regression equation calibrated with harvested melons. Absorbances of 906 and 874 nm that are key wavelengths for non-destructive ○Brix determination were included in the multiple regression equation as the independent variables. Therefore, it was concluded that ○Brix in growing fruits could be determined non-destructively in the field.
Ito, H., Morimoto, S. and Yamauchi, R. (2001). POTENTIAL OF NEAR INFRARED SPECTROSCOPY FOR NON-DESTRUCTIVE ESTIMATION OF SOLUBLE SOLIDS IN GROWING MELONS. Acta Hortic. 566, 483-486
Cucumis melo, Brix, a portalbe instrument, intact, harvest time, monitoring