Developments Of Web-Based Tobacco Planting Expert System And Soil Resources Consultation System Based On WebGIS In Tobacco Region

Tobacco is one of the most important industrial crops in our country. Planting tobacco provides economical benefits for farmers and also becomes a vital part of the agricultural structure adjustment. Many producing affairs were needed in the process of planting tobacco and special knowledge and technology were also involved. Therefore, the advancement of cultivation technique offered the basic guarantee for improving the efficiency of tobacco production. However, at present, few work has been conducted in the popularization of science and technology of tobacco cultivation and the higher efficiency of utilizing technical fruit. These problems restricted the production and quality of tobacco as well as the benefit of export. The expert system presented brand-new thinking and technological ways for solving complicated agricultural problems. The rapid development of computer network technology established the essential base for agricultural informationalization and also changed the traditional way of obtaining information and technology. According to the basic principle of expert system, "The Web-Based Tobacco Planting Expert System" and "The WebGIS-based Hubei Sanxia Soil Resource Information System" was designed. They were the systems that the theory and technique of tobacco planting, computer network and WebGIS were integrated. Meanwhile, the system has been running well on the website of Central China Agricultural Information Network and Hubei Sanxia Immigrant Technological Message Network and playing an active role in agricultural informationalization. Some main research works were completed as follow:1. The whole functional structure of this system was analyzed. Four major functional structures were designed. 1) the information system of tobacco planting which aimed to realize browse and inquiry of information. 2) the expert system of management for tobacco planting which was used to long-distance diagnose plant diseases and insect pests. 3) WebGIS of regional tobacco was designed to inquire and show the spacial data in tobacco region. 4) System management was employed to realize system management in the background.2. Our study devised in detail the whole structure of the expert system, repository, the rule base, the reasoning machine and so on. At present, on the basis of Browser/Web Server/Database structure, this system can meet the demands of different network environment and help to further be popularized and applied. Reasoning machine was designed based on forward reasoning of producing type. The separation of reasoningmachine from rule base can easily manage and update the knowledge and rule bases.3. Advanced network technologies utilized such as Web technology, multimedia technology, human-computer interaction technology completed a large number of system exploitation and realizing combined with the basic principle of expert system. The tobacco nutrition, plant diseases and insect pests can be diagnosed in long-distance through internet and the intuitionistic and vivid express of information technology knowledge were fulfilled.4. The information system of soil resource in tobacco region, Sanxia, Hubei province was constructed on the basis of MapXtreme component of WebGIS. Meanwhile, the system broadened the share of soil resource information and promoted the popularization of soil science and the proper utilization of soil resource in tobacco region.