Mineral nutrition of vegetable crops LXXIV: concentration and extraction of nine nutrients by radish plants

Abstract

From a plantation of radishes (Raphanus sativus, L. var. early scarlet globe) situated on a Latossolo Vermelho Escuro Orto serie "Luiz de Queiroz" soil, with a high natural fertility, plants were harvested with 12, 24 36 e 48 days old. The material was separated in the aerial part and edible roots and dried on 70°C for several days. Forthcoming the material was analyzed for N, P, K, Ca, Mg, Cu, Fe, Mn and Zn by the conventional laboratory tecniques. The authors concluded: The radish plant growth continuous from the begining to the harvest period. The concentration of the macro and micronutrients is very high in the aerial part and in the roots. A population 48 days old of 1,250,000 plantas/ha contents: N - 276.8 kg; P - 38.7 kg; K - 574.6 kg; Ca -105.1 kg; Mg - 45.8 kg; Cu - 23.4 g; Fe - 3195; Mn -366.8 g and Zn - 341.9 g.