Desenvolvimento inicial e composição mineral de copaíba cultivada em latossolo amarelo, textura média, sob omissão de nutrientes.

Abstract

The Copaiba is a native tree found at the tropical region of Latin America and. western Africa. The nutritional requirements of native. species have been studied. diffuseiy. Most of these studies: about the recuperation of degraded: areas have been focused: on the evaluation of patterns of recuperation, according to both botanical and silvicultura! aspects, once works involving basic or applied aspects of fertility of the soil and mineral nutrition of plants rarely are inserted into these studies. With the purpose of characterize the nutritional requirements of copaifera langsdorffii Dest (oil), the experiment was led in a greenhouse at “Universidade Federal Rural da Amazonia”, in Belém — PA, through the diagnosis thechnique by subtraction,, to determine those nutrients which limit the productive potential of the soil, indicated by the nutritional condition of the plants. The experimental design used was completely randomized, being 13 trataments with & replicates: Control (natural soil), complete fertilizer (with N, P, K, Ca, Mg, S, Cu, Fe, Mo, Mn, Zn), Complete + liming , in a way to increase the basis saturation (V%) of the soil to 60% and. Complte with the omission of each o nutrient (N, P, Ca, Mg, S, Cu, Fe, Mo, Man, Zn). The variables height of plants, diameter of the stem, production of dry mass of leaves, stem, roots, and total was measured. The dry mass of seedling performance of copaíba cultivated in sandy loan yellow latosol was more affected by nitrogen, follewed by iron and zinc. The sequence: of nutritional requirements of copaiba was as follows: N > Mg > Cu > Fe > Zn > Ca > K' The height seedling growth of copaíba wasn't so affected by omision of nutrients. The diameter of the stem seediing growth of copaiba was better when used liming.The development of copaiba is satisfactory when applied to the soil fertilization followed by liming to increase the base saturation to 60%.