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Anais da Escola Superior de Agricultura Luiz de Queiroz
versão impressa ISSN 0071-1276
versão On-line ISSN 2316-8935
CIETTO, Sergio; HAAG, Henrique Paulo e DECHEN, Antonio Roque. N, P and K storage by coffee plants (Cofeea arabica L. cv. Catuai) with two, three, four and five years old growing on a red-yellow latossol (ustoc). An. Esc. Super. Agric. Luiz de Queiroz [online]. 1991, vol.48, pp.245-268. ISSN 0071-1276. http://dx.doi.org/10.1590/S0071-12761991000100014.
From a coffe plantation situated on a Red-yellow Latossol in the Santo Izidro farm near Salto, State of São Paulo, Brazil, coffee plants two, theree four and five years old were cut near the ground level of the soil at the following growth periods: July (grow almost nihil), January (pin-head stage) and June (ripe stage). The material was divided into stem, branches, leaves and fruits and dried at 80) C and analyzed for N, P, K, by laboratory conventional methods. The authors concluded: - During the months of January an June the five years old trees accumulated the greatest quantities of dry matter and nutrients in the fruits. - Fruits of five years old coffee trees export through-out the following percentages interms of the total content in the tree: N-45%, P-56%, K-62%.
Palavras-chave : dry matter accumulation; extration N, P, K; ustoc.