COMBINED APPLICATIONS OF MR, RS, AND GIS FOR SUSTAINABLE SUGARCANE PRODUCTION

摘要

Near Infrared Reflectance (MR) and Remote Sensing (RS) were used to gather detailed information on soil and crop conditions that play an important role in sustainable sugarcane production. The MR system was also used to measure not only sucrose but also P, K, and Mg simultaneously. Large quantities of data collected using the MR system were combined in a Geographic Information System (GIS) in order to execute spatial analyses. Mapping of the information on cane quality and minerals in the juice and soils was carried out for all cane fields in Minami-Daito and Kita-Daito Islands. The results of analyses showed the presence of high levels of K in the cane juice and that fields needed adjustments in the application rates of K to insure optimum sugar yields. As a complement to NIR, high-resolution satellite images, such as those developed by the IKONOS system, were used to evaluate the cane growth conditions and to prepare field maps. The combined applications of NIR, RS and GIS are proving effective in improving management practices on individual farms.