Influência das águas do estuário do Rio Pará na fertilidade do solo das ilhas de várzea em Belém, Pará
| Autor: | Sérgio Brazão e Silva, Karine Costa de Almeida, Francisco José Lima de Souza, Deivison Rodrigues da Silva, Joberta Cardoso Pastana, Ilano Silva Braga do Nascimento, Jessivaldo Rodrigues Galvão |
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| Rok vydání: | 2018 |
| Předmět: |
geography.geographical_feature_category
Phosphorus Significant difference chemistry.chemical_element Estuary Forestry 04 agricultural and veterinary sciences 010501 environmental sciences 01 natural sciences Geography chemistry Fresh water Archipelago 040103 agronomy & agriculture Cation-exchange capacity 0401 agriculture forestry and fisheries General Earth and Planetary Sciences Ecosystem Soil fertility 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Biotemas. 31:15-21 |
| ISSN: | 2175-7925 0103-1643 |
| Popis: | The Para River is an immense estuary formed by numerous rivers and bays, composing a large body of fresh water that flows into the ocean. In this environment, there are many islands, of which 39 belong to the city of Belem. These islands have a small percentage of terra firma, including areas cultivated by family farmers. The objective of this study was to evaluate the effect of the water movement of the Para River estuary on soil fertility of islands of Belem, Para. Sampling was carried out on 23 islands in a varzea ecosystem with an area greater than 10 ha, including three significantly large islands (Mosqueiro, Caratateua and Cotijuba) and three islands (Mutum, Santa Rosa and Joao Pilatos) that belong to the municipality of Ananindeua, located south of Mosqueiro. The samples were collected in a riverine environment, surrounding the islands, with the goal of better understanding the areas used by the local population. The study indicates that there is variability in the soil fertility of insular environments of Belem, including a significant difference between the archipelagos evaluated for calcium (Ca+2), magnesium (Mg+2), potassium (K+) and aluminum (A+3), as well as the sum of bases (SB) and cation exchange capacity (CTC). No significant difference was observed for the values of available phosphorus (P). A gradient in the south-north direction was also observed for the elements K+, Mg+2 and Al+3. |
| Databáze: | OpenAIRE |
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