Studying of the Influence of Phytoviruses on Plants’ Organism in Conditions of Ecological Instability and its Estimation by Mathematical Modelling in CEIS System

Abstract

The computer ecological intellectual system (CEIS) is developed in the investigated regions on the basis of the object-orientated approach with the purpose to be used in systems of processing ecological information. (Voytenko, Zagorodni, 1997). The system has developed dialogue means, which allow setting base data maps for their processing through internal and external models of natural and agricultural processes. The result of such processing is new maps of the economic, ecological or social characteristics. The maps are created on the basis of researched region division into geographical elements for the supervision of necessary characteristics changes of dynamics. Thus, there is an opportunity to realise the analysis and forecasting. CEIS is logically and structurally subdivided into the subsystems. The subsystem is an abstraction. Its subclasses are versions of objects that represent the global characteristics of any mental or real territorial subsystem. According to such project and hierarchy of objects, it is obvious, that objects of derivative classes from the abstract generalised class and can submit the specialisation of the subsystems. Hence, at the centre of consideration -we have a subsystem, that displays a real current state of a pattern, which answers one of the characteristics, say, of current radiating loading in view of accommodation of pollution sources, natural-climatic conditions, sociologiceconomic structure and so on. The minimal specification of the project is determined as follows: - Biological subsystem (ground, microorganisms, viruses, plants, animals, birds); - Subsystem of environment (climatic conditions, pollution); - Subsystem of social development; - Subsystem of managing and economy. One of the external models, which is represented in CEIS, is a model of a haricot bean plant development in ontogenesis, nodule nitrogen fixing during a virus infection in different ecological conditions (Zagorodni, Boyko, Beiko 1995). As it is known, virus is a very sensitive system at change of the natural factors, therefore it can be used as the indicator of the environment state. The model uses the initial information as maps of the environment subsystem of CEIS (temperature, humidity, PH of soil, radiating, pestisidal and industrial soiling) and is a basis for the construction of new maps - maps of infection, productivity and its quality, pollution of a crop and so on. Also, through such a model, it is possible to find optimum conditions for the cultivation of a healthy vegetative material. The processes, which pass in vegetative organism, are separately given in the model. For each process, it is constructed of a function of potential force and a function of real force, which is defined under conditions of action of the laws of conservation of substances and energy. Thus, CEIS can be applied in the research of ecological processes in different conditions of investigated regions. Then the region is broken into geographical elements with the given set of abstract subsystems. As an example, a model of development of the plants in different conditions of Ukraine is shown.