Models for estimating leaf area of mango, using linear measures.
Lima R. T. de, Souza P. J. de O. P. de, Rodrigues J. C., Lima M. J. A. de
Author Affiliation: UFRA, Belém, PA, Brazil.
Revista Brasileira de Fruticultura 34 : 974-980
Abstract : The objective was to determine the models that best describe the relationship between linear dimensions and leaf area of mango, cv. Tommy Atkins, and to establishing the correction factor. The research has been conducted at the experimental farm of Federal Rural University of Amazonia, at Cuiarana village, municipality of Salinópolis, Pará. 90-150 leaves from 11 trees were analyzed in a field experiment and it was determined the length and width of leaves. The leaf area was determined using the actual of foliar area integrator Area Meter (AM 300). The correction factor was obtained by dividing the real foliar area by foliar area calculated. Linear and nonlinear models also estimated leaf area. The mathematical models created present an excellent performance, with R2 values between 90 and 97%. The correction factor of 0.71 can be used to estimate the involving real leaf area of mango, multiplied by linear measurements. The models that used the product dimensions, as independent variables, had R2 values higher than those who used only one dimension, being the cubic model, the most accurate.