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Master's Dissertation
DOI
https://doi.org/10.11606/D.74.2011.tde-11082011-095426
Document
Author
Full name
Fernanda de Fátima da Silva
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Pirassununga, 2011
Supervisor
Committee
Luz, Pedro Henrique de Cerqueira (President)
Bruno, Odemir Martinez
Herling, Valdo Rodrigues
Title in Portuguese
Sistema de visão artificial para a identificação da nutrição de milho submetido a níveis de cálcio, magnésio e enxofre
Keywords in Portuguese
Zea mays L.
Nutrição de plantas
Parâmetros de crescimento
Sistema TreeVis
Solução nutritiva
Abstract in Portuguese
A pesquisa visou a avaliar o processamento de imagens digitais pelo Sistema TreeVis (SVA) para identificar o estado nutricional de plantas de milho com níveis induzidos de Ca; Mg e S em plantas de milho (Zea mays L.). Foram utilizados tratamentos constituídos pela omissão completa e individual dos nutrientes Ca, Mg e S e para cada nutriente foram avaliadas doses crescentes (1/3, 2/3 e completa) do elemento e 4 repetições. Esse experimento foi realizado em casa de vegetação sob cultivo hidropônico, conduzido em vasos com solução nutritiva. Foram determinados os parâmetros de crescimento da cultura do milho (altura da planta, número de folhas e diâmetro do colmo) e massa seca das plantas. Foram feitas amostragens de plantas em V4, V6 e V8, visando determinar os teores de macro e micronutrientes das raízes e parte aérea e observados a sintomatologia de deficiência das plantas. Nesses estádios, através de um sistema de visão artificial, também foram obtidas as imagens das folhas. A omissão de Ca, Mg e S na solução nutritiva promoveu sintomas típicos de deficiência de cada nutriente em plantas de milho. O sistema de visão artificial conseguiu identificar os sintomas de deficiência de Ca, Mg e S com 80%, 75,5% e 78% de acertos, respectivamente.
Title in English
Artificial vision system to identify the nutrition of maize subjected to levels of calcium, magnesium and sulfur
Keywords in English
Zea mays L.
Growth parameters
Nutrient solution
Plant nutrition
TreeVis System
Abstract in English
The research aimed to evaluate the processing of digital images by TreeVis System (AVS) to identify the nutritional status of corn plants with induced levels of Ca, Mg and S in corn (Zea mays L.). Treatments used were made by the individual and complete omission of Ca, Mg and S and for each nutrient were evaluated escalating doses (1/3, 2/3 and complete) element and four replications. This experiment was conducted in a greenhouse under hydroponic cultivation in pots with nutrient solution. It was determined the growth of corn (plant height, leaf number and stem diameter) and plant dry. Samples were collected from plants in V4, V6 and V8 engines, to determine the levels of macro and micronutrients from the roots and shoots and observed symptoms of deficiency of plants. In these stages, through an artificial vision system, images were also obtained from the leaves. The omission of Ca, Mg and S in the nutrient solution caused symptoms typical of each nutrient deficiency in maize plants. The artificial vision system could identify the symptoms of deficiency of Ca, Mg and S with 80%, 75.5% and 78% accuracy, respectively.
 
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ME6721711.pdf (3.41 Mbytes)
Publishing Date
2011-08-12
 
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