Designing and Implementation of a Decision Supporting System for Precision Fertilization (DSSPF)
Tingbo Dai · Zhongguo nongye Kexue · 2004
Integrating GIS, GPS and a knowledge model for crop management, a decision supporting system forprecision fertilization was developed with Mapobjects based on field yield, soil nutrient and growth condition. The systemcan be utilized to receive GPS signals, store and modify property data, search and analyse field information under differentspatial and temporal environments, and make prescription maps for fertilizer and planting density. As shown in a riceexperiment carried out in Liuhe County, Nanjing with the application of the system the yield substantially improved whilethe amount of nitrogen applied decreased from 220 kgha-1 (with traditional management methodology) to 183.4 kgha-1. Thispositive result is restlted from the fact that the system can efficiently supply nitrogen to the fields according to their spatialneeds and reasonably administrate the frequency and timing of fertilization for the crops based on their nutrient demand atkey growth stages.