Soil Acidification
Mostrando 13-24 de 26 artigos, teses e dissertações.
-
13. Estoques e labilidade da matéria orgânica e acidificação de um argissolo sob plantio direto afetados por sistemas de cultura e adubação nitrogenada / Organic matter stocks and lability and acidification of a no-tilled brazilian soil as affected by cropping systems and nitrogen fertilization
A presente pesquisa foi realizada em experimento de longa duração (19 anos) conduzido em Argissolo Vermelho (220 g kg-1 argila) sob plantio direto (PD), e teve como principais objetivos (i) estimar os parâmetros da dinâmica da MO e verificar o papel de sistemas de cultura e da adubação nitrogenada no acúmulo de C orgânico no solo; (ii) avaliar o frac
Publicado em: 2007
-
14. Remediação de áreas contaminadas com metais pesados utilizando Acidithiobacillus sp. / Soil remediation with heavy metals using Acidithiobacillus sp.
The "Lake Region" of Santa Gertrudes is one of several contaminated sites with heavy metals in São Paulo State, Brazil. As in other regions of this country, in the 1970s the ceramic industries of Santa Gertrudes disposed their solid wastes and wastewaters directly in soil and contaminated an area of 1.5 km2. Biological solubilization of lead (Pb) and zinc (
Publicado em: 2006
-
15. Uso de biofertilizantes de rochas com enxofre e Inoculado com acidithiobacillus em Argissolo Acinzentado do Vale do São Francisco cultivado com melão.
The production of biofertilizers from rocks is a practical process that may reduce the energy consumption and promote nutrients availability for plant growth. Nutrient content of P and K biofertilizers varied according to the methodology and the used material. Presently biofertilizers are known as fertilizers that are produced using different organic by-prod
Publicado em: 2006
-
16. Avaliação do ciclo de vida do álcool etílico hidratado combustível pelos métodos EDIP, exergia e emergia / Life cycle assessment of hydrated ethylic alcohol fuel by EDIP, exergy and emergy methods
One of the most integrated, complete and efficacious means for the environmental management of productive activities is based on the life cycle of the product, whose main tool is the life cycle assessment. The assessed product is the hydrated ethylic alcohol fuel because of the environmental improvement possibilities during its life cycle, an alternative for
Publicado em: 2005
-
17. Effects of sprinkler irrigation with treated sewage effluent, rich in sodium, on the chemical and physical properties of a typic hapludults cultivated with Tifton 85 grass. / Efeito da irrigação com efluente de esgoto tratado, rico em sódio, em propriedades químicas e físicas de um argissolo vermelho distrófico cultivado com capim-Tifton 85.
The natural scarcity of freshwater in the world has been aggravated by the pollution of the watercourses. The systems of treatment of sewage generate residues, such as treated sewage effluent, that when launched into rivers, has caused environmental impact. The use of the sewage effluent has been considered an important practice to minimize the negative impa
Publicado em: 2004
-
18. ESTUDO DA ELETRO-OSMOSE EM SOLOS RESIDUAIS DESENVOLVIMENTO DE EQUIPAMENTO E METODOLOGIA DE ENSAIO / THE STUDY OF ELECTRO-OSMOSIS IN RESIDUAL SOILS: DEVELOPMENT OF TEST EQUIPMENT AND METHODOLOGY
The present dissertation presents a laboratory study of electro-osmosis in a residual soil from gneiss. The objective of this study was to develop test equipment and methodology. Two different cells were constructed,one for natural and the other for reconstituted material. The experimental results are consistent with technical literature values. It was obser
Publicado em: 2002
-
19. Cladonia verticillaris (lÃquen) como biomonitor padrÃo da qualidade do ar no distrito de JaboatÃo-PE
Liquens are recognized as environmental bioindicators and biomonitors of air quality. In this research the District of JaboatÃo, Metropolitan Meso-region of Recife (MMR), Pernambuco, Brazil was selected for evaluating the air quality in that area, correlating data obtained from the biological monitors â liquens, with the results obtained in the stations of
Publicado em: 2002
-
20. WATER FLUX, CHEMICAL BALANCE AND SOIL CHANGES IN THE ATLANTIC FOREST REACHED BY AIR POLLUTION FROM CUBATÃO, SÃO PAULO, SP, BRAZIL / Fluxo de Água, Balanço Químico e Alterações no Solo da Floresta Atlântica Atingida pela Poluição Aérea de Cubatão, SP, Brasil.
Estudaram-se neste trabalho os efeitos da deposição atmosférica sobre o balanço de elementos químicos, analisando-se as entradas e saídas dos elementos através do ciclo hidrológico durante quatro anos (setembro de 1991 a agosto de 1995) na Floresta Atlântica, situada nas vizinhanças do pólo industrial de Cubatão, São Paulo. Por meio de amostrage
Publicado em: 2001
-
21. Response of Atmospheric Methane Consumption by Maine Forest Soils to Exogenous Aluminum Salts†
Atmospheric methane consumption by Maine forest soils was inhibited by additions of environmentally relevant levels of aluminum. Aluminum chloride was more inhibitory than nitrate or sulfate salts, but its effect was comparable to that of a chelated form of aluminum. Inhibition could be explained in part by the lower soil pH values which resulted from alumin
American Society for Microbiology.
-
22. Structure of a Microbial Community in Soil after Prolonged Addition of Low Levels of Simulated Acid Rain
Humus samples were collected 12 growing seasons after the start of a simulated acid rain experiment situated in the subarctic environment. The acid rain was simulated with H2SO4, a combination of H2SO4 and HNO3, and HNO3 at two levels of moderate acidic loads close to the natural anthropogenic pollution levels of southern Scandinavia. The higher levels of ac
American Society for Microbiology.
-
23. Methodological Modifications for Accurate and Efficient Determination of Contaminant Biodegradation in Unsaturated Calcareous Soils
Many techniques for quantifying microbial biodegradation of 14C-labeled compounds use soil-water slurries and trap mineralization-derived 14CO2 in solution wells suspended within the incubation flasks. These methods are not satisfactory for studies of arid-region soils that are highly calcareous and unsaturated because (i) slurries do not simulate unsaturate
-
24. Adaptation of H+-Pumping and Plasma Membrane H+ ATPase Activity in Proteoid Roots of White Lupin under Phosphate Deficiency1
White lupin (Lupinus albus) is able to adapt to phosphorus deficiency by producing proteoid roots that release a huge amount of organic acids, resulting in mobilization of sparingly soluble soil phosphate in rhizosphere. The mechanisms responsible for the release of organic acids by proteoid root cells, especially the trans-membrane transport processes, have
American Society of Plant Physiologists.