02423naa a2200529 a 450000100080000000500110000800800410001910000200006024500870008026000090016730000120017652009830018865000150117165000170118665000220120365000130122565000220123865000260126065000150128665000150130165000210131665000250133765000180136265000210138065000260140165000210142765000290144865000160147765000120149365000090150565000260151465000270154065300170156765300130158465300110159765300280160865300110163665300250164765300090167265300100168170000160169170000150170770000140172270000150173670000130175177301290176416700322018-12-04       2000    bl uuuu     u00u1 u    #d1 aDINKELMEYER, H.  aFate of applied N fertilizer in mixed tree cropping systems in the central Amazon.  c2000  ap. 173.  aThe aim of the study was to investigate the fate of 15N in the soil-plant system of a mixed cropping system (pupunha, cupuacu, castanha-do-Para, urucu). Urucu (annatto), cupuacu and pupunha (peach palm) took up more than 90% of the fertilizer under their own canopy. After two weeks castanha-do-Para (Brazil nut) took up more than 70% of the N fertilized to the neighboring tree crops (pupunha, 40%; urucu, 25%; cupuacu, 8%). At the ende of rainy season castanha-do-Para even took up more than 80% from the neighboring trees (pupunha, 42%; urucu, 36%; cupuacu; 6%). Furthermore, pupunha e castanha-do-Para could prevent nutrient leaching with their deep roots and take up N from the subsoil N pool better than urucu and cupuacu. Castanha-do-Para was able to effectively capture N and may contribute to nutrient recycling in the agroforestry. However, this nutrient capture may also lead to nutrient competition and fertilizer placement and amount has to be adjusted accordingly.  aabsorption  aagroforestry  amultiple cropping  anitrogen  asoil conservation  atropical rain forests  aAbsorção  aAdubação  aBactris Gasipaes  aBertholletia Excelsa  aBixa Orellana  aCastanha do Para  aConservação do Solo  aCultivo Multiplo  aFloresta Tropical Úmida  aNitrogênio  aPupunha  aRaiz  aRelação Solo-Planta  aTheobroma Grandiflorum  aAgrofloresta  aAmazonas  aBrasil  aFertilizers application  aManaus  aPlant soil relations  aRoot  aUrucu1 aLEHMANN, J.1 aKAISER, K.1 aRENCK, A.1 aTRETER, U.1 aZECH, W.  tIn: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS, 2000, Hamburg. Programa and abstracts... Hamburg: University, 2000.