Knowledge Representation of Prescribed Fertilization in Web-Based Expert System of Rapeseed(B.napus) Production
Guiping Liao · JOURNAL OF HUNAN AGRICULTURAL UNIVERSITY · 2002
Fertilization decision is one of the key cultivation techniques in rapeseed ( B.napus ) production, and thus becomes the important part of rapeseed expert system. Prescribed fertilization,in which precision or half-precision fertilization takes the place of the experience of farmers,has magnitude meanings in reducing environment pollution and increasing fertilizer benefit. The knowledge representation of prescribed fertilization in expert system is of integration and complexity,as prescribed fertilization knowledge involved the describing, relating and computing knowledge. Based on the analysis of rapeseed demands characteristics of fertilizer,this paper is an attempt to put forward the main factors that expert system fertilization decision should consider,to discusse the rapeseed prescribed fertilization technology, and at last,to bring forward the knowledge representation, algorithm and rules of prescribed fertilization in web-based expert system of rapeseed production. The knowledge representation is general in crop expert system,as pointed out in the paper.