Composição mineral de folhas com e sem pecíolos em três posições nos ramos ao longo de doze meses em maracujazeiro amarelo (Passiflora edulis f. flavicarpa Degener) / Mineral composition of yellow passion fruit (Passiflora edulis f. flavicarpa Degener) leaves with and without petioles of three positions in branches along twelve months

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The present work was carried out in orchard in Viçosa, MG, Brazil, in the year of 2003/04, with objective to determine the seasonal variation of foliar nutrients content in yellow passion fruit and to give subsidies to the leaf sampling for nutritional diagnose. Leaf samples had been collected with and without petioles in the basal, medium and apical positions of the branches during twelve months. The samples had been collected in a experiment located Sitio Mamão, in Viçosa-MG, and analyzed in the Laboratory of Mineral Nutrition of Plants of the Department of Plant Science of the Federal University of Viçosa. The plants had been lead in a 1,8 m height one wire espalier, spaced of 2,5 x 2,8m. Foliar contents of N, P, K, Ca, Mg, S, B, Fe, Cu, Mn and Zn were determined. A variation index was calculated by the quotient between mean squares of the month/position in the branch and month/type of leaf by the respective minor mean square, according to methodology described by Amaral et al., (2002). The lesser variations in foliar nutrients contents had been observed from April and June. The lesser indices of variation had been observed in leaves without petiole collected in the medium position of the branches. Based on the results the collection of leaf samples without petioles in the medium position of the branches sends from April to June is recommended for diagnose of the nutritional state of the yellow passion fruit.

ASSUNTO(S)

foliar diagnosis diagnose foliar passiflora edulis fitotecnia passion fruit maracujá passiflora edulis

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