Flooded Soil
Mostrando 13-24 de 111 artigos, teses e dissertações.
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13. Soil CH4 and N2O Emissions from Rice Paddy Fields in Southern Brazil as Affected by Crop Management Levels: a Three-Year Field Study
ABSTRACT Rice yield increases in response to improvements in crop management, but the impact on greenhouse gas (GHG) emissions in the subtropical region of Southern Brazil remains unknown. A three-year field study was developed aiming to evaluate the impact that an increase in crop management levels (high and very high) has on soil methane (CH4) and nitrous
Rev. Bras. Ciênc. Solo. Publicado em: 03/05/2018
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14. Contamination and Soil Biological Properties in the Serra Pelada Mine - Amazonia, Brazil
ABSTRACT Discovered in 1980 and unleashed an utter gold rush of the modern era, Serra Pelada was the largest open-air mine in Brazil. About 80,000 gold prospectors worked there until 1984, when the gold pits were flooded. The environmental impact caused by mining inflicted irreversible damage to the ecosystem, with the formation of a large lake and piles of
Rev. Bras. Ciênc. Solo. Publicado em: 15/02/2018
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15. N2O-reducing activity of soil amended with organic and inorganic enrichments under flooded conditions
ABSTRACT Changes, apparent after investigation, in the physical and chemical properties in soil, as a result of organic and inorganic enrichments under flooded conditions, influence the growth of denitrifiers. The aim of this study was to determine the effect of the addition of manure (8 kg m−2) (M), clay (50 kg m−2) (CL) and lime (1.12 kg m−2) (Ca) on
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-08
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16. Effects of flooding and its temporal variation on seedling recruitment from the soil seed bank of a Neotropical floodplain
ABSTRACT Evaluation of the effects of flooding on seedling recruitment from seed banks helps in understanding vegetation regeneration in floodplains. We studied the effects of simulated flooding on richness and abundance of, and temporal variation in, seedling recruitment from the soil seed bank of a floodable savanna of the Pantanal wetland, under two condi
Acta Bot. Bras.. Publicado em: 27/10/2016
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17. ARSÊNIO E ARROZ: TOXICIDADE, METABOLISMO E SEGURANÇA ALIMENTAR
Arsenic is considered a semimetal, and its wide distribution in the Earth's crust in different chemical forms, including organic and inorganic species, has a great deal of influence on the mechanisms of toxicity. Exposure to arsenic can be either through occupational practice (use of pesticides) or by the consumption of water and food containing the element.
Quím. Nova. Publicado em: 2015-01
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18. Structure and diversity of restingas along a flood gradient in southeastern Brazil
This study aimed to relate changes in structure and species diversity with edaphic variables (soil type and flooding regime) in a gradient of forest formations within the Brazilian restingas (coastal woodlands). The study was carried out in the Jacarenema Municipal Natural Park, in the city of Vila Velha, in the Espírito Santo State, Brazil. We evaluated th
Acta Bot. Bras.. Publicado em: 2013-12
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19. Temporal variation in the composition of ant assemblages (Hymenoptera, Formicidae) on trees in the Pantanal floodplain, Mato Grosso do Sul, Brazil
Temporal variation in the composition of ant assemblages (Hymenoptera, Formicidae) on trees in the Pantanal floodplain, Mato Grosso do Sul, Brazil. In this paper we investigate how seasonal flooding influences the composition of assemblages of ants foraging on trees in the Pantanal of Mato Grosso do Sul. During the flood in the Pantanal, a large area is cove
Rev. Bras. entomol.. Publicado em: 2013-03
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20. Estoque de combustível fino e decomposição de folhas em florestas de igapó do rio Negro / Fine fuel load and leaf decomposition in Rio Negro floodplain forests
In years of low rainfall, fires have occurred in Amazonian black-water floodplain forests, including the Middle Rio Negro. The fires are documented from satellite images. Forest fires require ignition sources, fuel and dry weather. To understand the susceptibility of these forests to fire we investigated the stock of fine fuel on the ground at 29 sites in bl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/10/2012
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21. DISPONIBILIDADE DO NITROGÊNIO EM SOLOS DE VÁRZEA E PARÂMETROS DA PLANTA PARA AVALIAÇÃO NUTRICIONAL DA CULTURA DO ARROZ IRRIGADO / NITROGEN AVAILABILITY IN LOWLAND SOILS AND PLANT PARAMETERS FOR NUTRITIONAL EVALUATION OF FLOODED RICE CROP
O objetivo desse trabalho foi avaliar a mineralização de N em condições aeróbicas e anaeróbicas em experimento de incubação e monitorar o nível de N nas plantas com o uso clorofilômetro para estabelecer um valor crítico de leitura SPAD (Soil Plant Analysis Development) para a cultura do arroz irrigado. Foram desenvolvidos dois estudos, sendo o est
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012
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22. O efeito do solo, inundação e topografia sobre as campinaranas inundáveis na Amazônia
Little is known about the factors that determine the spatial variation in structure, floristic composition and diversity in the Amazon Campinaranas. The Campinaranas are characterized by predominantly oligotrophic sandy soils. In the Negro River basin, they occur in a mosaic of grassland formations, forest and savanna, often associated with flooding. To infe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
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23. Dinâmica evolutiva de mandioca (Manihot esculenta Crantz) em três tipos de solo manejados por caboclos na região do médio Rio Madeira, Amazonas
Manioc (Manihot esculenta Crantz) is the most important food crop worldwide that originated in Amazonia. Bitter manioc varieties are one of the most important food staples for traditional peoples in Central Amazonia, and a growing body of studies has increased our understanding of the evolutionary dynamics of the crop under traditional cultivation. However,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/03/2011
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24. Uso de nitrogênio no cultivo de arroz irrigado e seus efeitos no solo, na planta e na emissão de óxido nitroso / Use of nitrogen in the cultivation of rice and its effects on soil, lant and nitrous oxide emission
In wetland soils are countless electrochemical changes, among the most influenced by anaerobic conditions is nitrogen. The rice crop also determine changes in the process, either by the nutrient uptake or by changes in the rhizosphere. The nitrogen can guarantee high yields of rice, however, due to the inadequate use of nitrogen can have nitrous oxide, which
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2011