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Horticultura Brasileira

versão impressa ISSN 0102-0536versão On-line ISSN 1806-9991

Resumo

GRANGEIRO, Leilson C.  e  CECILIO FILHO, Arthur B.. Accumulation and exportation of macronutrients in seedless watermelon. Hortic. Bras. [online]. 2005, vol.23, n.3, pp.763-767. ISSN 0102-0536.  http://dx.doi.org/10.1590/S0102-05362005000300015.

The accumulation and exportation of nutrients of the seedless watermelon hybrid Nova was determined under field conditions. The experiment was carried out in Typic Paleudult soil, in the Itápolis region, São Paulo State, Brazil. Sampling of the plants was done at 15; 30; 45; 60 and 70 days after transplanting date (DAT) and the accumulation of dry mass and macronutrients was quantified in leaves, stem + branches and fruits. The dry mass accumulation was slow until 30 DAT, intensifying with the beginning of the fruit development. At the end of the cycle, the average contribution of leaves, stems + branches and fruits, was respectively of 30; 31 and 39%. The accumulation of nutrients followed the curve of dry mass accumulation. The larger demand for macronutrients occurred from 45 to 60 DAT. The order of nutrients accumulation for the culture was: K>N>Ca>P>Mg>S. The fruits exported 20.3 kg ha-1 of N, 4.0 kg ha-1 of P, 26.6 kg ha-1 of K, 1.4 kg ha-1 of Ca, 1.6 kg ha-1 of Mg and 1.4 kg ha-1 of S.

Palavras-chave : Citrullus lanatus; plant nutrition; growth.

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