Fate of applied N fertilizer in mixed cropping systems in the central Amazon.
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Aim of the study was to investigate the nitrogen dynamics and the fate of applied nitrogen fertilizer in the soil-plant system of a mixed cropping system consisting of peach palm, cupuacu, urucu, and Brazil nut, in the Manaus-AM (Brasil). According the results, annato, cupuacu and peach palm seemed to take up more than 90% of th incorporated nitrogen fertilizer under their own canopy. However, Brazil nut took up more than 70% of the fertilized nitrogen from the fertilized areas under the canopies of the neighboring trees (peach palm: 40%, annato: 25%, cupuacu: 8%) two weeks of the fertilizer application. At the end of the rainy season, Brazil nut even took up more than 80% from underneath neighboring trees crops (peach palm: 42%, annato: 36%, cupuacu: 6%). Furthemrmore, peach palm and Brazil nut were better able than the other two trees in reducing nutrient leaching due to their deep root system.
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Agrofloresta, Bixa orella, Urucu, Brasil, Amazonas, Manaus, Sustainability, Agroforesty, Fertilizers application, Adubação, Bertholletia Excelsa, Bactris Gasipaes, Castanha do Para, Cultivo Multiplo, Desenvolvimento Sustentável, Floresta Tropical Úmida, Lixiviação, Nitrogênio, Pupunha, Raiz, Uso da Terra, leaching, land use, multiple cropping, nitrogen, tropical rain forests