Estimation of leaf area in coffee leaves (Coffea arabica L.) of the Castillo® variety

Bragantia

Carlos Andrés Unigarro-muñoz¹  Juan David Hernández-arredondo¹  Esther Cecilia Montoya-restrepo¹  Ruben Darío Medina-rivera¹  Lizardo Norbey Ibarra-ruales¹  Claudia Yoana Carmona-gonzález¹  Claudia Patricia Flórez-ramos¹ 

关键词: modeling;    length;    width;   

DOI  :  10.1590/1678-4499.0026

来源: SciELO

【 摘 要 】

Allometric models based on measurements of single leaf dimensions or a combination there are useful tools for determining individual leaf area (LA) because they are non-destructive, precise, simple and economical methods. The present study was carried out at the Central Station Naranjal of Cenicafé, located in the Department of Caldas (Colombia), four models were defined using the variables length (L) and/or width (W) to estimate LA in coffee leaves of the Castillo® variety (Coffea arabica L.). Estimation of regression coefficients was performed using information recorded from 6,441 leaves (group 1), and their validation was performed using records from another 992 leaves (group 2). Leaves were collected from all strata of the canopy and ranged from 0.76 to 140 cm2 in LA. In addition to exhibiting coefficients of variation differing from zero based on t-tests at 1%, the evaluated models possess coefficients of determination between 0.93 and 0.99. Four expressions have developed and adjusted to estimate leaf area in individual leaves, based on the measurement of simple variables and non-destructive.

【 授权许可】

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