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Doctoral Thesis
DOI
https://doi.org/10.11606/T.11.2019.tde-20191220-105821
Document
Author
Full name
Durval Dourado Neto
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 1992
Supervisor
Title in Portuguese
Previsão do rendimento da cultura de feijão (Phaseolus vulgaris L.)
Keywords in Portuguese
FEIJÃO
MODELOS DE PREVISÃO
RENDIMENTO
Abstract in Portuguese
Com o objetivo de apresentar uma metodologia de previsão do rendimento para cultura de feijão, desenvolveu-se um modelo universal onde são considerados o solo, a planta e a atmosfera conjuntamente. Para sua utilização é necessário conhecer capacidade de campo, ponto de murchamento permanente, profundidade efetiva do sistema radicular, análise química do solo, duração dos estádios de desenvolvimento e coeficiente de cultura, índice de área foliar, latitude, insolação, temperatura média do ar, umidade relativa, velocidade do vento e evaporação do Tanque Classe A. Foram estimados os déficits e os excedentes hídricos utilizando o procedimento para realização do balanço hídrico proposto por Thornthwaite & Mather, considerando a profundidade efetiva do sistema radicular variando segundo três tipos básicos de curva de crescimento: sigmoidal (com três variações), potencial e linear, além de estimar a armazenagem por três diferentes procedimentos. Verificou-se, em função dos resultados de estimativa do teor de água e do rendimento da cultura de feijão, que não houve diferença entre os métodos utilizados. Constatou-se que a não consideração do efeito dos atributos químicos do solo leva à superestimativa de rendimento. Concluiu-se que o modelo universal e utilizável para o que foi proposto.
Title in English
Prediction of yield of common bean (Phaseolus vulgaris L.)
Abstract in English
With the purpose to present a model for the prediction of yield of common bean, a universal model was developed in which the different phases of the agricultural system (soil-plant-atmosphere) are considered. The following input data are requested by the model: field capacity, permanent wilting point, effective rooting depth, data from chemical soil analysis, duration of the development stages, crop coefficient, leaf area index, latitude, insolation, mean air temperature, relative humidity, wind speed and Class A pan evaporation. The water deficits and excesses were estimated using the procedure for the calculation of the water balance proposed by Thornthwaite & Mather, considering that root growth occurs following three basic types of curves: a sigmoid (with three variations), a potential and a linear equation, the soil water storage being estimated by three different methods. Considering the results of the soil water and the bean yield estimates, it was verified that there was no difference between the methods. It was observed that non-consideration of the effect of the chemical attributes relative to the soil leads to a yield superestimation. It was concluded that the universal model is applicable for its purpose.
 
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DouradoNetoDurval.pdf (22.19 Mbytes)
Publishing Date
2019-12-20
 
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