Development of multiband optical sensing method for phenotyping of tomatoes in cultivation site

Abstract

For the development of a smart food chain, it is necessary to produce stable high-quality agricultural products in the agricultural sector which is the starting point of the food system, and it is important to accumulate and analyse the phenotypic information of agricultural products during cultivation. An easy, rapid, non-destructive and quantitative evaluation method of tree vigor is desirable. This study aimed to develop an X-ray fluorescent (XRF) spectroscopy of fresh leaves and infrared (IR) spectroscopy of fruit juice using a portable device. In addition, the relationship between the spectroscopic information and the surface color of agricultural products was studied. The results showed that the changes in leaf element were in balance and organic matters in the fruits due to slight differences in cultivation conditions were grasped as the XRF and IR spectroscopic information. Furthermore, such changes could be reflected as the differences in the surface color information obtained using the digital camera. Therefore, it was experimentally suggested that the multiband optical sensing could be a powerful and important tool for realizing smart food chains and phenomics research starting from agricultural production.

Development of a Simultaneous Quantification Method for Multiple Modes of Nitrogen in Leaf Models Using Near-Infrared Spectroscopic Measurement

“…In addition, it was found that the developed XRF spectroscopic method was useful as a quantitative analytical method for the elemental contents of the fresh leaf by comparing it with a standardly used Inductively Coupled Plasma method [ 26 ]. These results could suggest the importance of accumulating quantitative spectral information relating to the organic components, such as the saccharides and organic acids, of the fresh leaf [ 12 , 24 ].…”

“…Furthermore, it was suggested that these sensing methods could have a close affinity with information technologies [23]. We have also been conducting research on multiband optical sensing to comprehensively acquire bioinformation relating to the elemental balance, organic components, and color appearance changes formed by the overall metabolic process [13,24]; we experimentally demonstrated the mid-infrared (MIR) spectroscopic determination of the nitrate nitrogen in fresh leaves [25]. In addition, it was found that the developed XRF spectroscopic method was useful as a quantitative analytical method for the elemental contents of the fresh leaf by comparing it with a standardly used Inductively Coupled Plasma method [26].…”