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Journal Article

Estudo da dinâmica de nutrientes em solo de várzea da Ilha do Careiro no estado do Amazonas

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Citation

Alfaia, S., & Falção, N. (1993). Estudo da dinâmica de nutrientes em solo de várzea da Ilha do Careiro no estado do Amazonas. Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 12(3/4), 485-493.


Cite as: http://hdl.handle.net/21.11116/0000-0004-8978-B
Abstract
In contrast to the upland "terra firme" terrain, the floodplain várzea in the Amazon is the zone that is used for supporting rational agriculture without use of fertilizers. Following the dynamics of the main soil nutrients, two distinct floodplain environments were selected, namely high and low várzea. Soil samples were collected throughout the whole year of 1987. No significant differences were found in the concentrations of the main nutrients for samples taken during different periods. However, the concentrations of Ca, Mg, Na, Al, H, Cu, Zn and Mn in the low várzea were always higher than in the high várzea. This could be a result of the deposition effect during former flood periods, because the low várzea is exposed more to seasonal flooding. The study of the main nutrients analysed in the várzea floodplain soils shows a high natural fertility.