Cardinal temperatures and modeling of vegetative development in guava
AUTOR(ES)
Ferreira, Mábele de C.
FONTE
Rev. bras. eng. agríc. ambient.
DATA DE PUBLICAÇÃO
14/10/2019
RESUMO
RESUMO O objetivo deste estudo foi estimar as temperaturas cardinais (basal inferior, ótima e basal superior) e simular o desenvolvimento vegetativo da goiabeira através dos modelos filocrono (linear) e Wang e Engel (não linear) durante a fase de muda. Um experimento de campo instalado em Itajubá, MG (22° 24’ 46.43” S 45° 26’ 48.94” O) foi conduzido durante dois anos sob o delineamento inteiramente casualizado, com doze épocas de semeadura e cinco unidades experimentais por tratamento, totalizando sessenta unidades experimentais. As temperaturas cardinais foram estimadas através de doze métodos descritos na literatura e os valores foram: basal inferior, 10,9 ºC, ótima, 17,3 ºC e basal superior, 51,2 °C. O modelo do filocrono foi superior ao Wang e Engel na simulação do desenvolvimento vegetativo da goiabeira, com valor de raiz do quadrado médio do erro de 1,5 folhas.ABSTRACT The aim of this study was to estimate cardinal temperatures (base, optimum, and maximum), and simulate the vegetative development of guava crop through phyllochron (linear) and Wang and Engel (nonlinear) models at the seedling phase. The experiment was conducted in Itajubá, MG, Brazil (22° 24’ 46.43” S 45° 26’ 48.94” W), for two years in a completely randomized design with twelve sowing dates and five experimental units per treatment, totaling sixty experimental units. The cardinal temperatures were estimated using twelve methods described in the literature and the values were: base, 10.9 °C, optimum, 17.3 °C and maximum, 51.2 °C. The phyllochron model was superior to Wang and Engel’s model for simulation of vegetative growth of guava, with root mean square error of 1.5 leaves.
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