ResumoO Rio Pará é um imenso estuário formado por diversos rios e baías, compondo um grande contingente de água doce para o oceano. Nesse ambiente, encontram-se muitas ilhas, sendo 39 pertencentes à cidade de Belém. São ilhas com pouca porcentagem de área de terra irme, com presença de áreas cultivadas por agricultores familiares. O trabalho teve como objetivo avaliar o efeito da movimentação da água do estuário do Rio Pará na fertilidade do solo das ilhas de Belém, Pará. A amostragem foi realizada em 23 ilhas em ecossistema de várzea com área superior a 10 ha, incluindo as três maiores que possuem signiicativa área de terra irme (Mosqueiro, Caratateua e Cotijuba) e três ilhas pertencentes ao município de Ananindeua, situadas ao sul de Mosqueiro (Mutum, Santa Rosa e João Pilatos). As amostras foram coletadas em ambiente ribeirinho, contornando as ilhas, procurando contemplar as áreas exploradas pela população. O estudo indica que existe variabilidade na fertilidade do solo no ambiente insular de Belém, com diferença signiicativa entre os arquipélagos avaliados, para os teores de Cálcio (Ca +2 ), Magnésio (Mg +2 ), Potássio (K + ) e Alumínio (Al +3 ), além da Soma de Bases (SB) e Capacidade de Troca Catiônica (CTC). Não se observou diferença signiicativa para os valores de Fósforo disponível (P). Observou-se também um gradiente decrescente na direção sul-norte para o K + e o pH. Abstract Inluence of water of the Rio Pará estuary on soil fertility of várzea islands in Belém, Pará. The ParáRiver is an immense estuary formed by numerous rivers and bays, composing a large body of fresh water that lows into the ocean. In this environment, there are many islands, of which 39 belong to the city of Belém. These Revista Biotemas, 31 (4), dezembro de 2018 16 S. Brazão e Silva et al.islands have a small percentage of terra irma, including areas cultivated by family farmers. The objective of this study was to evaluate the effect of the water movement of the Pará River estuary on soil fertility of islands of Belém, Pará. Sampling was carried out on 23 islands in a várzea ecosystem with an area greater than 10 ha, including three signiicantly large islands (Mosqueiro, Caratateua and Cotijuba) and three islands (Mutum, Santa Rosa and João 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 Belém, including a signiicant 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 signiicant 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 .
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.