temperatura base e filocrono em duas cultivares de oliveira base temperature and phyllochron in two olive cultivars
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ID: 234016
2012
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Abstract
O objetivo deste trabalho foi estimar a temperatura base para emissão de folhas e determinar o filocrono em duas cultivares de oliveira, 'Arbequina' e 'MGS ASC315', durante a fase de muda em condições de campo. Foi instalado um experimento na Fazenda Experimental da Empresa de Pesquisa Agropecuária de Minas Gerais, Maria da Fé, MG. Utilizou-se o delineamento inteiramente casualizado, em esquema fatorial 2x6, sendo duas cultivares e seis épocas de transplantio, com quinze repetições. A temperatura base (Tb) foi estimada usando a metodologia do menor valor do quadrado médio do erro (QME), e o filocrono foi obtido através do inverso do coeficiente angular da regressão linear entre o número de folhas emitidas e a soma térmica acumulada. A Tb estimada para a Arbequina foi de 10,5°C e 11°C para a MGS ASC315. O filocrono diferiu estatisticamente somente entre as cultivares, sendo menor para a 'Arbequina' (21,7°C dia-1 folha-1) quando comparada com a 'MGS ASC315' (41,6°C dia-1 folha-1).
The objective of this work was to estimate the base temperature for leaf appearance and the phyllochron for two cultivars of Olea europaea L. A field experiment was carried out in the experimental area of the Agricultural Research Corporation of Minas Gerais, Maria da Fé, MG. The experimental design was completely randomized with two cultivars and six planting dates. Base temperature (Tb) was estimated by the minimum mean square error (MSE) and the phyllochron was estimated by the inverse of the slope of regression between main stem leaf number and accumulated thermal time. The estimated base temperature was 10.5°C for Arbequina and 11°C for MGS ASC315. The phyllochron was statistically different only between cultivars, lower for 'Arbequina' (21.7°C day-1 leaf-1) compared to 'MGS ASC315' (41.6°C day-1 leaf-1).
The objective of this work was to estimate the base temperature for leaf appearance and the phyllochron for two cultivars of Olea europaea L. A field experiment was carried out in the experimental area of the Agricultural Research Corporation of Minas Gerais, Maria da Fé, MG. The experimental design was completely randomized with two cultivars and six planting dates. Base temperature (Tb) was estimated by the minimum mean square error (MSE) and the phyllochron was estimated by the inverse of the slope of regression between main stem leaf number and accumulated thermal time. The estimated base temperature was 10.5°C for Arbequina and 11°C for MGS ASC315. The phyllochron was statistically different only between cultivars, lower for 'Arbequina' (21.7°C day-1 leaf-1) compared to 'MGS ASC315' (41.6°C day-1 leaf-1).
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martins2012cinciatemperatura
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| Authors | ;Fabrina Bolzan Martins;Diogo da Fonseca Reis;Marcos Vinícius Marques Pinheiro |
| Journal | Trials |
| Year | 2012 |
| DOI |
10.1590/S0103-84782012001100011
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