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Case studies of a modified biological simulator (TOMGRO) acc

时间:2021-09-14 00:11人气:来源: 未知

Case Studies of a Modified Biological Simulator (TOMGRO) according to Short Cropping Period

M. Tchamitchian Kittas Écodéveloppement, I.N.R.A.,

University of Thessaly, School of DomaineSaint-Paul, Site Agroparc, Agricultural Science, Dept. of Avignon Cedex 9, 84914, France

Agriculture Crop Production & Rural,

Environment, Fytokou Str, 38446, N. Ionia Magnesias, Greece

Keywords: Biological simulator, TOMGRO, decision-making systems, case studies, growth, tomato production.

Abstract The aim of this work was sensitivity analysis of a modified biological simulator (TOMGRO) in tomato crop during winter period. The modified biological simulator (TOMGRO) that used for case studies of the experiment has been developed and validated according short cropping period, cultivation techniques and climate conditions of the countries and growers near Mediterranean. Sensitivity analysis was necessary in order to test simulator’s behaviour according different climate scenarios. Case studies were focused in the influence of temperature in tomato growth and production. For this purpose experiments were carried out in the farm of the University of Thessaly in the region of Velestino. Climate data were recorded inside and outside of the greenhouse area. Simultaneously biological data for tomato growth and production were recorded. Results showed that climate variation inside the greenhouse area causes modification in tomato growth rate and production. It was found that temperature increasing leads to: i). increasing the number of nodes, leaves and trusses of the plants, ii). reduction of dry weight of leaves, stems, fruits and plant leaf area, iii). simultaneously reduction of mature fruits number and iv). early production. The management of greenhouse climate can be made more efficient by using the case studies results from the biological model. A part of the conclusions will contribute to balance of earnings of a product’s nominal value into the market, according to the management cost of the greenhouse equipment during the production process.

INTRODUCTION Protected cultivation of vegetables, cut flowers and ornamental plants are some of the fields with the highest interest during the last fifteen years on agricultural issues (Castilla, 1994). The greenhouses crops can be considered as the most intensive and complex form of the production process and often referred as the greenhouse industry in order to highlight the role of the technology in the process (Challa and Bakker, 1995). Today the problem of the production cost for horticultural crops can be solved by the use of biological simulators which are powerful tools that combine modern knowledge and simultaneously are able to compare different scenarios (van Straten et al., 2000). The models may define the development and the quantity of crop production and the strategy that have to be followed by producers during the growing season. The interest in modelling of biomass production for different crops is still

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