Abstract

JAIME-GUERRERO, Marilcen; ALVAREZ-HERRERA, Javier Giovanni  and  CAMACHO-TAMAYO, Jesús Hernán. Non -destructive model to estimate the individual foliar area by alometric parameters in gulupa (Passiflora edulis fo. edulis). rev.udcaactual.divulg.cient. [online]. 2023, vol.26, n.2, e2356.  Epub Aug 15, 2023. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v26.n2.2023.2356.

Gulupa is one fruit that has increased its exports from Colombia in the last 15 years due to its organoleptic characteristics. Knowing the leaf area (LA) in the gulupa crop is relevant, however there are no known practical methods that allow its calculation. The objective was to develop non-destructive models to estimate the individual LA through alometric parameters in gulupa leaves. The LA was determined in 100 leaves, using two standard methods: the laser portable meter CI-202 and the Easy Leaf Area software (ELA). The length of the central lobe (L), the right lobe (LD) and left (LI), and the width of the base of the lobes (a), and between the terminal tips of the lobes (b) were measured, and the total length (Lt) was calculated, as the sum of L+LD+LI. The linear models with the highest determination coefficient (R2) were the ones that related the variables L*a (0.9377; 0.9756) and Lt*a (0.9430; 0.9841) for the measurement of the LA with the CI-202 and the ELA respectively, and according to the estimated AF. The R2 of 0.9336 and 0.9612 were validated, between the area of the leaf measured in Arcabuco and the estimated with L*a for the two methods used, while for the estimation of LA based on LT*a for the two methods employed were found R2 of 0.9552 and 0.9680, which makes the ELA method the most reliable to measure AF and that the allometric variable Lt*a allows obtain the best prediction of individual AF in gulupa leaves.

Keywords : Allometry; Mathematical model; Nondestructive method; Plant development; Passifloraceae.

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