Mineral nutrition of vegetable crops: LV - fruit development of cucumber (Cucumis sativus L.) var. Aodai and nutrient exportation by harvesting

A commercial cucumber plantation was set in Piracicaba (SL: 22°41'31" and LW: 47°38'01"), State of São Paulo, Brazil, in a soil classified as "Terra Roxa Estruturada (Alfissol) séries Luiz de Queiroz", in order to study the fruit development and the nutrient exportation by harvesting. Plants (4 replications) with, 12, 24, 36, 48, 60, 72, and 84 dayz old from emergende were collected and divided into roots, stems, leaves of the stems, leaves of the shoots, masculine flowers, feminine flowers, and fruits. The material was dried at 80º C, and analysed for macro and micronutrients. The results indicated that the nutrient exportations by ton of harvested fruits at the ripe stage were: K- 1.617 g; N -1.05 g; P - 200 g; Ca - 174 g; Mg - 139 g; S - 58 g; Fe-1.9 g; Zn - 1.2 g; Mn - 1.0 g; B - 0.9 g; Cu - 0.5 g.Este trabalho foi realizado com os seguintes objetivos: determinar a evolução e produção dos frutos de pepino (Cucumis sativus L.) var. Aodai em função do desenvolvimento da planta, analisar as concentrações dos nurientes no fruto no ponto de consumo e calcular as quantidades de nutrientes exportados pela colheita dos frutos. Verifica-se que as quantidades de nutrientes exportados através da colheita, por tonelada de frutos no ponto de consumo, correspondem a: K -1.617 g, N-1.050 g; P-200 g; Ca -174 g; Mg-139 g; Fe-1,91 g; Zn -1,21 g; Mn-0,98 g; B-0,87g; Cu-0,52g