Theory of ecological balanced fertilization and application of the specialist system

Ecological balanced fertilization what we have proposed based on the general fertilization model, optimum technology and ecological fertilizer. The system of ecological balanced fertilization include: service object, aim of fertilization, theory basis, technology system, fertilizer using, and service system. Original innovations of the general model are as follow:(1) the interrelation of crop, soil, fertilizer and environment were considered ecologically;(2) the parameters of the model were derived from raw data( laboratory data, empirical data or survey data); (3) raw data was easy to acquire; (4) parameters could be connected by model quantificationally; (5) method of acquiring model parameters was provided;(6) relative simpleness, convenience and stabilization were what the model possesses, and yield improving and soil fertility, environment protection could be achieved after fertilizing by this model. The specialist system we proposed based on general fertilization model, regional fertilization model and block fertilization model. After ten years study, experiment and popularization, now, there are a series of softwares include network version, uniprocessor version, touch screen fertilization machinery and PDA fertilization machinery, and they have been popularized above 20 provinces.