| The total greenhouses area of china is the largest in the world. Multi-span greenhouse is added at the speed of 100-150 hm2 per year. Now, the total area 2 of china has reached 41 7hm The main aim of this system is how to lead the greenhouse farmer control the environment according the need of the plant so as to augment the yield of the greenhouse plant. With the development of the compute technology and the enlargement of the greenhouse area, control the environment will be much requisite in greenhouse. Therefore, the study of the system is very significant and much good for the peasant. Common Decision Support System can only be used on one computer. If the system is updated, the user has to update too. Otherwise, the result Of the system will be out bf season. So it抯 not easy to maintenance and update the svsten;. If the users have some advice, they only can contact the producer through certain way. It will trouble both users and producers. This system is based on web. It allows people use it on-line easily; everyone can use the information. The main merit is that the DSS is based on web. users can use it through Internet. All the users must do is to input the data of the greenhouse and correlative data, the system will output the result. It is interaction procedure. As long as the system updated, the new system is available to everyone. It makes that the results users get is always timely. If the users have an advice, they can leave word to the web administrator. They also can intercommunicate with each other through the greenhouse bulletin board svstem(BBS). This system has not only the function of DSS but also the benefit of web. Users log in the system through Internet. The system that they used are the Iv Abstract same system, they can share the information freely. The system has the merit of both DSS and web, we call it Web-based Decision Support System (WDSS). Its function is ?it can accept and save the data that is inputted by user, after the availability of the data has been judged. ?It contain repository and database, they can be maintenance easily and can be contained repository and database as much as possible. which is correlative with the WDSS. ?It can response the user抯 request in time, help the user make up their mind about their production. ?It not only has easy interface between system and user, but also can provide full-scale information. ?It can collect the information of the user in order that our institute serve for the greenhouse owners much better. ?It must contain many kind of plant information, so the user can learn it easih. This system is belonging to the agriculture bio-environment institute of zheiiang bniversity. and was make up of seven selection sub-systems and three information modules. The selection sub-systems are: Cooling sub-S vstein. humidity control sub- Systems. ii ghtino sub- ~vstem. neattn c sub- system. Ventilation sub-system. trngati on sub-system, fertilization sub-system. The information modules are: Shade Cloth modular. C02 modular. container flats & pots and machine modular. The WDSS 慡 interface is \慹rv easy, the operation is simple, too. The WDSS will he...
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