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The tomato is considered the second vegetable of economic importance in Brazil and for the success of its cultivation, depends to a large extent on the use of quality seedlings, since a well formed seedling will give rise to a plant with high productive potential. Adequate water availability is important to produce good seedlings, but failing that, commercial polymers inserted into the substrate can be used. The objective of this work was to study the effects on the development of cherry tomatoes in different doses of polymers applied to the substrate and different levels of irrigation until the transplant phase using fuzzy modeling. For this study, we used data from an experiment conducted at the Faculty of Technology of Presidente Prudente. The input variables of the developed system based on fuzzy rules were Polymer and Irrigation, and for both were defined 5 fuzzy sets. The output variables were shoot length (CPA), root length (CR) and seedling dry mass (MSM). For the SBRF output variables, 5 fuzzy sets were also defined. The analysis of the effects of polymer doses and irrigation levels on tomato seedlings was performed using three dimensional graphs and contour maps of the output variables. This analysis allowed us to conclude that, for irrigation levels below the maximum (daily irrigation), the use of 2 grams of polymers refers to the best conditions of the variables shoot length, root length and dry mass of the seedling.

MODELAGEM FUZZYPARA AVALIAÇÃO DA PRODUÇÃO DE MUDAS DE TOMATE CEREJA UTILIZANDO DIFERENTES DOSES DE POLÍMEROS E NÍVEIS DE IRRIGAÇÃO