Estudo da área foliar da flor de seda (Calotropis procera) no sertão paraibano.

Abstract

The family of Asclepiadaceae Silk Flower has excelled in adapting to semi-arid and arid regions, developing satisfactorily in degraded sons and sites with low leveis of rainfall remained green and lush all year round. Aimed to define, based on the length and width of limbo in vegetative growth phase, a methodology to estimate leaf área Silk Flower (Calotropis procera).The real leaf área were tested correlations (AFR) and the sheet length (C) real leaf área (AFR) and width, AFR and the product of length x width of the sheet, the sheet width and the product of length x width and length with the product of length x width. 6 plants were collected, and two small, two medium and large 2, with an average height of 1.47 m where 10% were picked leaves of each plant used in the analysis, being removed from the top, bottom and middle of the plant, in order to homogenize the size of the sheets.The results were submitted to regression analysis, with the equations obtained by Excel software. From a practical point of view, it is suggested choose the simple linear equation of the product (W x L).Thus, the estimation of leaf área silk flower, can be made by the model AF = C x L having obtained a coefficient of determination 0.82, where the width is the most stable variable to estimate the leaf área. it lacks the insertion of the stem and thus R2 is greater when correlates W x (W x L).