Colour and water content detection of sweet cherry by portable spectrometer

Abstract

Based on the most recent data, the average amount of sweet cherry produced in Hungary is around 10-12 thousand tons. Therefore fast and effective method is important for sweet cherry fruit quality analyses. The aim of the study was to examine the applicability of reflectance measurements for sweet cherry fruit quality analyses. In our experiment five cherry species (Vera, Cristalina, Germersdorfi, Noir de Mechet, Canada Giant) were examined in order to measure the spectral differences between species. Further more, spectral alteration was examined between different health and maturity status of the fruits in the case of a specified, the Germesdorfi species. The four new indices are appropriate tools for cherry quality analysis. Thus reflectance measurements can also support more precise and automated fruit selections. The methods for the differentiation of species could also be viable at a concerned habitat; however, the climate, habitat and soil conditions strongly affect the yield quality. Concerning the fast determination of water content, WBI could be a reliable method for the assessment

Vineyards characteristic by using GIS and refl ectance measurements on the Nagy-Eged hill in Hungary

“…Differences between relative water content of the leaves were also assessed in the near infra red (NIR) zone between 900-970 nm by the Water Band Index (WBI). WBI is a refl ectance measurement that is sensitive to changes in canopy water status (Nagy et al, 2011). As the water content of vegetation canopies increase, the strength of the absorption around 970 nm increases relative to that of 900 Vineyards characteristic by using GIS and refl ectance measurements on the Nagy-Eged hill in Hungary 59 nm.…”