Modelos alométricos na determinação da área foliar de Bauhinia monandra Kurz

Abstract

The aim of this study was to evaluate the efficiency of the adjustment of mathematical models for determining Bauhinia monandra leaf area using the length and/or width of the leaves as independent variables. Leaves from plants with three years were used to the estimative of equations in linear, quadratic and potential models. The validation from the estimated leaf area as a function of the observed leaf area showed that the linear model based on the product of length and width of the largest leaf surface is the model that best fits. However, the leaf area determination can be represented by using only the length or width of the leaves with little loss of accuracy. A representation that better estimates Bauhinia monandra leaf area with easy application is the potential model in which xi represents the length of one of the symmetrical leaf lobes.

Fruit Mass of <i>Carica papaya</i> L. from Cultivars Aliança and THB from the Width and Length of the Fruit

“…The equation must be chosen not only by the high coefficient of determination (R 2 ), but by several criteria as well as performed by [25] and [15]. The criteria for the validation of the equations are presented in Table 3.…”

Leaf Area Estimation of Garden Boldo From Linear Dimensions

“…However, a model must not be selected only for the high value of R 2 , during the modeling, but by the interpretation of all the statistical measures of validation from an independent sample of that used for modeling (Bosco et al, 2012;Fascella, Darwich, & Rouphael, 2013;Schmildt et al, 2016;Walia & Kumar, 2017). The validation made from the sample of garden boldo leaves verified that from the 12 adjusted equations, only those that used LW as an independent variable in the linear, quadratic and power models are suitable, according to the criteria of statistically linear coefficient equal to zero and statistically angular coefficient equal to one (Figure 2).…”

“…In practice, the use of linear model equations based only on one dimension of the leaves is preferable due to simplicity of application, mainly on the field (Tsialtas & Maslaris, 2005), as performed by Schmildt et al (2016), who indicated the use of length of leaves in Bauhinia monandra, and by Tartaglia et al (2016), who indicated the use of width of leaves in canola. However, in relation to garden boldo leaves, none of the models was suitable using only one allometric measure, as can be seen in Figure 2.…”

“…Leaf area modeling has been performed for medicinal species such as juazeiro (Zizyphus joazeiro Mart) (Maracajá, Madalena, Araújo, Lima, & Linhares, 2008), mofumbo (Combretum leprosum Mart) (Candido, Coelho, Maia, Cunha, & Silva, 2013), Bauhinia monandra Kurz (Schmildt, Schmildt, Alexandre, Fernandes, & Czepak, 2016), Valerian (Valeriana jatamansi Jones) (Walia & Kumar, 2017) and boldo (Plectranthus ornatus) (Silva, Pereira, Cabanez, Mendonça, & Amaral, 2017). However, we did not find in the literature any equation to estimate the leaf area of garden boldo (Plectranthus barbatus Andrews).…”

Adjustment of Mathematical Equations to Determine the Area Leaf of <i>Cordia myxa</i> L.

“…The use of mathematical equations to estimate leaf area has been reported for several plant species [5]- [11]. However, no literature is lack of studies that seek to model the area leaf for Cordia myxa L.…”