Balance of the nutrients Ca+2, Mg+2, Na+, K+e NO3- on a first order catchment covered with natural vegetation in Central Amazonia (1999)
- Authors:
- Autor USP: VICTORIA, REYNALDO LUIZ - CENA
- Unidade: CENA
- Subjects: VEGETAÇÂO; FLORESTAS TROPICAIS
- Language: Inglês
- Abstract: Balance of the nutrients Ca+2, Mg+2, Na+, K+e NO3- on a first order catchment covered with natural vegetation in Central Amazonia Por: da Cunha, Hillandia Brandao; de Oliveira, Joao Augusto Dantas; Victoria, Reynaldo Luiz Acta Amazonica Volume: 29 Edição: 1 Páginas: 33-41 Publicado: March, 1999 Context Sensitive Links Fechar ResumoFechar Resumo The study was conducted on a first-order catchment of about 3.5 km2 located on an experimental site 16 km west of the Manaus - Boa Vista highway, and 60 km north of Manaus. The main purpose was to quantify the balance of the nutrients Ca+2, Mg+2 , Na+, K+ and NO3- through the comparison of the values of rainfall input versus streamflow output. Water sampling and nutrient flux determinations were carried out on a monthly basis for a one year period. Ionic concentrations showed low variation along the period. The highest concentrations in the rainfall were related to the accumulation of aerosols in the atmosphere, after a long rainless period. The vegetation exerted, apparently, more influence on nitrate, over the other nutrients. The nutrient flux varied, where their total input was attributed to individual storms of great magnitude. The balance, expressed in kg.ha-1,year-1, was positive for all nutrients, with the following net gain values: Ca+2 (2,33); Mg+2 (1,66); Na+(2,07); K+(1,80) and NO3-(5,84)
- Imprenta:
- Source:
- Título: Acta Amazonica
- Volume/Número/Paginação/Ano: v. 29, n. 1, p. 33-41, 1999
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ABNT
CUNHA, Hillandia Brandao Oliveira da e OLIVEIRA, João Augusto Dantas e VICTORIA, Reynaldo Luiz. Balance of the nutrients Ca+2, Mg+2, Na+, K+e NO3- on a first order catchment covered with natural vegetation in Central Amazonia. Acta Amazonica, v. 29, n. 1, p. 33-41, 1999Tradução . . Acesso em: 11 fev. 2026. -
APA
Cunha, H. B. O. da, Oliveira, J. A. D., & Victoria, R. L. (1999). Balance of the nutrients Ca+2, Mg+2, Na+, K+e NO3- on a first order catchment covered with natural vegetation in Central Amazonia. Acta Amazonica, 29( 1), 33-41. -
NLM
Cunha HBO da, Oliveira JAD, Victoria RL. Balance of the nutrients Ca+2, Mg+2, Na+, K+e NO3- on a first order catchment covered with natural vegetation in Central Amazonia. Acta Amazonica. 1999 ; 29( 1): 33-41.[citado 2026 fev. 11 ] -
Vancouver
Cunha HBO da, Oliveira JAD, Victoria RL. Balance of the nutrients Ca+2, Mg+2, Na+, K+e NO3- on a first order catchment covered with natural vegetation in Central Amazonia. Acta Amazonica. 1999 ; 29( 1): 33-41.[citado 2026 fev. 11 ] - Estimation of N2 -fixation by sugarcane, Saccharum sp., and soybean, Glycine max, grown in soil with 15 N-labelled organic matter
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