01972nam a2200289 a 450000100080000000500110000800800410001910000160006024500550007626002260013130000160035752010700037365000170144365000260146065000110148665000240149765000290152165000140155065000180156465000150158265300130159765300110161065300110162170000170163270000140164970000190166316689712018-12-28       1995    bl uuuu     u00u1 u    #d1 aSCHMIDT, P.  aBalances of bioelements in useful tropical plants.  aIn: SYMPOSIUM ON THE MANAGEMENT AND REHABILITATION OF DEGRADED AREAS AND SECONDARY FORESTS IN AMAZONIA, 1993, Santarém. Proceedings... Rio Piedras: International Institute of Tropical Forestry/USDA - Forest Servicec1995  ap. 207-213.  aThe productivity of different useful tropical plants is compared with respect to their biomass production. Furthermore, analyses of nutrient contents serve to explain the interrelationship between nutrient supply and primary production. The biomass and nutrient contents from three to six month old plants from Bertholletia excelsia H.B.K. (castanha-do-Brasil), Cedrela odorata L. (cedro vermelho), Dipteryx alata (cumaru), Theobroma grandiflorum (Spreng.) K. Schum. (cupuacu), Elaeis guineensis Jacq. (dende), Swietenia macrophylla King (mahogany), Sclerobium paniculatum Vogel (taxi branco) and Bixa orellana L. (urucum) within the different plant fraction were determined. The elements Ca, Mg, K, Na, Fe, Al, Zn, Cu, and P were analysed with the inductively coupled argon plasma with optical-emission-spectrometry (ICP-OES) method. Compared to plants of temperate regions, the mineral content is distinctly higher than that for tropical plants, but most values still lie within the range of existing data. Extremely high values were found for aluminium and iron.  aforest trees  atropical rain forests  ayields  aEssência Florestal  aFloresta Tropical Úmida  aNutriente  aProdutividade  aRendimento  aAmazonas  aBrasil  aManaus1 aLIEBEREI, R.1 aBAUCH, J.1 aGASPAROTTO, L.