Fertilization effects on soil P, K, Ca and Mg contents in a mixed tree cropping system in Central Amazonia.
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Study on the fertilizer effects on P, K, Ca and Mg contents in mixed tred cropping system (castanha-do-Para, pupunha, cupuacu, pueraria). Fertilizers at four different levels (30%, 100%, 100%+P and 30%-N-lime) of the recommended fertilization, Embrapa Amazonia Ocidental, Manaus-AM, Brasil). The high soil nutrient contents under pupunha indicated that this species does not need the large amounts of fertilizers applied. For urucu, the P and K fertilization could be reduced. Generally, the species effect was more clearly visible below 15 cm depth, whereas the effect of fertilizationdominated the nutrient differences at the topsoil.
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Agrofloresta, Urucu, Brasil, Amazonas, Manaus, Tropical rain forest, Fertilizers application, Cover plants, Adubação, Bixa Orellana, Bactris Gasipaes, Bertholletia Excelsa, Castanha do Para, Cobertura do Solo, Conservação do Solo, Cultivo Multiplo, Cupuaçu, Fertilidade do Solo, Floresta Tropical Úmida, Leguminosa, Pupunha, Pueraria Phaseoloides, Theobroma Grandiflorum, agroforestry, legumes, multiple cropping, soil conservation, soil fertility