Results 21 to 30 of about 238 (49)
Avaliação do risco de eutrofização em reservatórios da bacia do Acaraú, Ceará, Brasil.
Revista Tecnologia, 2009 A eutrofização em reservatórios vem comprometendo a qualidade da água em todo o mundo. No estado do Ceará, Brasil os reservatórios Araras, Edson Queiroz e Jaibaras, localizados na bacia do Acaraú, apresentaram elevadas taxas de nutrientes, durante um ano
Maria Cléa Brito de Figueirêdo +2 more
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Synergistic effects between omnivorous filter-feeding fish and nutrient enrichment on algal biomass
Acta Limnologica Brasiliensia, 2015 Aim: The Nile tilapia - Oreochromis niloticus(Linnaeus 1758) - is an exotic omnivorous filter-feeding fish that has been stocked for three decades in man-made lakes of Northeastern Brazil.
Leonardo Henrique Teixeira +1 more
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LAYERED DOUBLE HYDROXIDES: NANOMATERIALS FOR APPLICATIONS IN AGRICULTURE
Revista Brasileira de Ciência do Solo, 2015 The current research aims to introduce Layered Double Hydroxides (LDH) as nanomaterials to be used in agriculture, with particular reference to its use as storage and slow release matrix of nutrients and agrochemicals for plant growing.
Luíz Paulo Figueredo Benício +10 more
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Acta Limnologica Brasiliensia, 2012 Environmental monitoring studies in the Hydrographical Basin of Pardo River, RS, Brazil, in the time series from 2007 to 2009, showed no agreement between the water quality evaluation obtained through the Water Quality Index (WQI - NSF), which ranged ...
Daiane Lautert Moretto +3 more
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Revista Brasileira de Ciência do Solo, 2009 A região dos Campos Gerais do Paraná é importante produtora de leite em sistema confinado e, com isso, também geradora de dejeto líquido bovino. Os objetivos deste trabalho foram avaliar perdas de água, solo, P total, P solúvel e P particulado em chuva ...
Hélio Fumiaki Mori +4 more
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Acta Limnologica Brasiliensia, 2011 AIM: In this investigation we carried out an experiment to assess whether the growth of Egeria najas and E. densa (two rooted submersed Hydrocharitacea, native to South America) are limited by inorganic carbon or not; METHODS: We measured the early plant
Aline de Freitas, Sidinei Magela Thomaz
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Revista Brasileira de Ciência do Solo, 2013 Phosphorus (P) applications to vineyards can cause P accumulation in the soil and maximize pollution risks. This study was carried out to quantify the accumulation of P fractions in sandy soils of vineyards in southern Brazil. Soil samples (layers 0-5, 6-
Djalma Eugênio Schmitt +9 more
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Application of ecological indicators in coastal watershed under high pressure during summer period
RBRHWater bodies located in coastal areas are subject to human pressures and the loss of environmental quality. The objective of this study was to evaluate the environmental quality of the river Papaquara through water quality and river landscape, using the ...
Aichely Rodrigues da Silva +3 more
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Revista Brasileira de Zootecnia, 2010 Os objetivos neste trabalho foram caracterizar os efluentes de viveiros de Macrobrachium amazonicum criados em diferentes densidades de cultivo e analisar a variação nictemeral (24 horas) do perfil vertical da temperatura e da saturação de oxigênio da ...
Gustavo Gonzaga Henry-Silva +3 more
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Acta Limnologica Brasiliensia, 2011 AIM: This study aimed to determine the effects of nitrate enrichment on leaf decomposition process and the kinetic parameters of decomposition model; METHODS: Samples of water from a first-order stream and senescent leaves of the native tree species ...
Alan Mosele Tonin, Luiz Ubiratan Hepp
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