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Search Results: 1 - 10 of 59359 matches for " Mayesse Aparecida da;Mello "
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Potencial erosivo da chuva no vale do rio doce, regi?o centro leste do estado de Minas Gerais: primeira aproxima??o
Oliveira, Flávio Pereira de;Silva, Marx Leandro Naves;Curi, Nilton;Silva, Mayesse Aparecida da;Mello, Carlos Rogério de;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000600016
Abstract: among the climatic factors that interfere in water erosion, precipitation, expressed by the rainfall erosivity, is of great importance. therefore, its knowledge becomes fundamental for the recommendation for soil management and conservation practices that seek the reduction of water erosion. in that context, the objectives of this work were: a) to determine the rainfall erosivity and its distribution at rio doce valley, minas gerais state, for nine sub-regions, b) to estimate the monthly ei30 index in the period from 1969 to 2005 for ferros and guanh?es counties, and c) to determine the return periods of the monthly and yearly erosivity indexes. the average erosivity value obtained was 12.913 mj mm ha-1 h-1 year-1, being classified as very high. among the sub-regions, the erosivity values varied from 8.243 to 26.676 mj mm ha-1 h-1 year-1. the critical periods in relation to water erosion due to the occurrence of erosive rains are january-march and november-december, contributing with 88.6% of the annual erosivity. from april to october, the occurrence of critical erosivity practically does not exist. the estimated individual maximum values for the return periods of 1, 10, 50, and 150 years were of 5.508, 15.534, 18.110, 19.632, and 5.542, 17.653, 20.954, 22.931 mj mm ha-1 h-1 year1 for ferros and guanh?es, respectively. the determination of the erosivity values throughout the year allows to identify the months in which the risks of soil and water losses are higher, which is important for planning the conservation practices.
Mayesse Aparecida da Silva,José Márcio de Mello,José Roberto Soares Scolforo,Luíz Czanck Júnior
CERNE , 2008,
Abstract: Candeia (Eremanthus erythropapus) is a woody species that produces wood for various uses and with high economicvalue. This fact has caused an uncontrolled exploitation of the species. One way to reduce the exploitation impact of candeia tree is toelaborate a sustainable management plan. Spatial evaluation is important to analyze the ecological behavior of the species. The resultsmay help the comprehension of the spatial dependency and the pattern of distribution. The objective of this study was to analyze thehorizontal spatial structure of Eremanthus erythropapus (candeia) under a tree-seed system, in trials installed in august 2003 in thedistrict ofAiuruoca, in the State ofMinasGerais. The spatial analysis of the regeneration and the seed-treeswere performed by Ripley sK, using their geographic coordinates. The results indicated that the regeneration presented an aggregated distribution pattern, confirmingthe capacity of candeia to form mosaics in the vegetation, originating candeia predominant forests. The adult plants presented anaggregated pattern moving into a random pattern. There was no dependency relationship between adult plants and regeneratio
Environmental characterization and soil organic matter prediction for Salto Watershed, Extrema, MG Caracteriza o ambiental e predi o dos teores de matéria organica do solo na Sub-Bacia do Salto, Extrema, MG
Anna Hoffmann Oliveira,Mayesse Aparecida da Silva,Marx Leandro Naves Silva,Junior Cesar Avanzi
Semina : Ciências Agrárias , 2012,
Abstract: Rational management in a watershed requires knowledge of several important parameters regarding the hydrology, including morphometric, vegetation cover and soil organic matter (MOS) amounts. The objectives of this study were to evaluate the morphometric characteristics, identify the existence of vegetation using the normalized difference vegetation index (NDVI) and analyze the spatial variability of the organic matter amount, obtained through combination of landscape properties of the Salto Sub-basin, Extrema, MG, Brazil. Digitalized topographic maps, satellites images and the Inverse Distance Weighted interpolation methods were used to acquire the MOS spatial variability. The Salto Sub-basin has a median tendency for flooding; drainage is efficient and highly branched. Most part of the Sub-basin is occupied by degraded pastures with vegetation with high biomass occurs mainly in headwater areas. The properties set that better estimated the MOS was slope, profile curvature, NDVI and topographic wetness index (TWI). In most of the study area, MOS showed medium amount (2.01 to 4.00 dag kg-1), with higher levels in areas of high altitudes (about 1,600 m) at the headwaters of the Sub-basin. O manejo racional em uma bacia hidrográfica requer o conhecimento de diversos parametros, entre eles a morfometria, a cobertura vegetal e o teor de matéria organica do solo (MOS). Os objetivos do trabalho foram avaliar as características morfométricas, a presen a de vegeta o utilizando o índice de vegeta o por diferen a normalizada (NDVI), e a distribui o espacial dos teores de matéria organica do solo (MOS) obtida a partir da combina o dos atributos da paisagem na Sub-bacia Hidrográfica do Salto, no município de Extrema, MG. Foram utilizados mapas topográficos digitalizados, imagens de satélite e o modelo de regress o linear múltipla relacionando os atributos da paisagem com o teor de MOS para obter a distribui o espacial da MOS. A Sub-bacia do Salto possui tendência mediana a enchentes, a drenagem é eficiente e bastante ramificada. Grande parte da sub-bacia encontra-se ocupada por pastagens degradadas e a vegeta o com grande quantidade de biomassa ocorre principalmente nas áreas de cabeceira. O conjunto de atributos que melhor estimou o teor de MOS foi declividade, perfil de curvatura, NDVI e índice topográfico de umidade (TWI). A MOS apresentou teor médio (2,01 a 4,00 dag kg-1) na maior parte da área estudada, situados principalmente em áreas de maior altitude (cerca de 1.600 m) nas cabeceiras da Sub-bacia.
Quando o crítico se retira da plateia: a desilus?o de Machado de Assis com o teatro
Mello, Franceli Aparecida da Silva;
Machado de Assis em Linha , 2011, DOI: 10.1590/S1983-68212011000200009
Abstract: the creation of a high-level national theatre was part of a political project which the generation of machado de assis embraced with enthusiasm, that is to say, the modernization of society with a view to inserting brazil in the "civilized world". in this essay, i try to demonstrate how much machado de assis engaged in this project through his theater reviews as well as discuss the reasons for his withdraw al from the theater at a certain moment of his life.
Aggregate stability in soils cultivated with eucalyptus
Avanzi, Junior Cesar;Norton, Lloyd Darrell;Silva, Marx Leandro Naves;Curi, Nilton;Oliveira, Anna Hoffmann;Silva, Mayesse Aparecida da;
Pesquisa Agropecuária Brasileira , 2011, DOI: 10.1590/S0100-204X2011000100012
Abstract: the objective of this work was to evaluate the aggregate stability of tropical soils under eucalyptus plantation and native vegetation, and assess the relationships between aggregate stability and some soil chemical and physical properties. argisols, cambisol, latosols and plinthosol within three eucalyptus-cultivated regions, in the states of espírito santo, rio grande do sul and minas gerais, brazil, were studied. for each region, soils under native vegetation were compared to those under minimum tillage with eucalyptus cultivation. the aggregate stability was measured using the high-energy moisture characteristic (hemc) technique, i.e., the moisture release curve at very low suctions. this method compares the resistance of aggregates to slaking on a relative scale from zero to one. thus, the aggregate stability from different soils and management practices can be directly compared. the aggregate stability ratio was greater than 50% for all soils, which shows that the aggregate stability index is high, both in eucalyptus and native vegetation areas. this suggests that soil management adopted for eucalyptus cultivation does not substantially modify this property. in these soils, the aggregate stability ratio does not show a good relationship with clay or soil organic matter contents. however, soil organic matter shows a positive relationship with clay content and cation exchange capacity.
Avalia??o e espacializa??o da erosividade da chuva no Vale do Rio Doce, regi?o centro-leste do Estado de Minas Gerais
Silva, Mayesse Aparecida da;Silva, Marx Leandro Naves;Curi, Nilton;Santos, Gérson Rodrigues dos;Marques, Jo?o José Granate de Sá e Melo;Menezes, Michele Duarte de;Leite, Fernando Palha;
Revista Brasileira de Ciência do Solo , 2010, DOI: 10.1590/S0100-06832010000400003
Abstract: a very active and influential parameter in the erosive process is the r factor, called rainfall erosivity. this factor is one of the components of the universal soil loss equation. studies in spatial variability have been conducted in an attempt to define the spatial distribution of the r factor for a given region. this study aimed to calculate the rainfall erosivity (r factor - ei30) to generate spatial maps. the study was conducted in experimental areas of eucalyptus stands in nine counties of the rio doce valley, central-eastern region of minas gerais state, brazil. rainfall data from january 2005 to december 2008 were used. erosivity was spatialized according to geostatistical principles and data interpolation using kriging. the annual rainfall erosivity indexes ranged from 7,970 to 18,646 mj mm ha-1 h-1 year -1 . the reaching distance of the monthly erosivity index varied from 10 to 177 km, and was 52 km for the annual index.
Abelhas africanizadas em área metropolitana do Brasil: abrigos e influências climáticas
Mello,Maria Helena Silva Homem de; Silva,Elisabete Aparecida da; Natal,Delsio;
Revista de Saúde Pública , 2003, DOI: 10.1590/S0034-89102003000200012
Abstract: objective: africanized bees are the most aggressive bees, form swarms several times a year and build their nests in a great variety of places different from european bees. this behavior brings them into closer contact with human populations, thus giving rise to a larger number of injuries. a study was carried out to gain greater knowledge on these bees' behavior and thus create more efficient strategies for dealing with them and educating the population on this regard. methods: data consisted of 3,061 registries of requests to the center for the control of animal diseases of s?o paulo for removing bee colonies and wandering swarms in the period between 1994 and 1997.an evaluation of the most frequent nesting sites and their correlation with climatic variables was conducted using pearson's coefficient. results: there were 3,061 requests in the study period and the daily volume had a positive correlation with average temperature and degree of insolation and a negative correlation with relative humidity and rainfall. the colonies showed a likelihood for nesting in artificial constructions and the wandering swarms for nesting in trees. conclusions: those periods of the year characterized by high temperatures and low rainfall are related to greater activity of bees and a larger number of wandering swarms, thus giving rise to increased contact with human populations. items such as boxes and oil-drums should not be left outdoors and ceilings and walls should be sealed off, as they are potential nesting sites for colonies and swarms. wooded areas may harbor swarms, thus care should always be taken when in the proximity of such areas. no attempt should be made to handle swarms.
Manejo mecanico e cultura de cobertura na entrelinha da seringueira (PB 235 e RRIM 701) e os atributos físicos de um latossolo vermelho no Planalto Paulista
Centurion, José Frederico;Roque, Cassiano Garcia;Centurion, Maria Aparecida Pessoa da Cruz;Prado, Renato de Mello;
Revista árvore , 2004, DOI: 10.1590/S0100-67622004000100002
Abstract: this work aimed to mechanically evaluate the effect of soil management between rubber tree rows using heavy bars and rotary mowers and cover crop on the physical properties of the soil. thus, rubber trees (pb 235 and rrim 701) were established in a dystrophic hapludox soil in jaboticabal-sp in 1992, so that the spaces between the rows were managed with heavy bars, rotary mowers and tropical kudzu crop cover (puerariaphaseoloides). after eight cropping years, some physical attributes of the soil (density, macro and microporosity, particle size and water clay dispersion)were analyzed in the rows. the mechanical and cover crop management in the space between the rows had affected the physical properties of the soil, especially porosity and density although not influencing significantly soil particle size. the greatest physical alterations in the soil in function of the management of the space between the rubber tree rows became evident only in the superficial layer of the soil (0-20 cm). rotary mower management significantly reduced soil porosity (0.08-0.04 m3/m3) and increased soil density (1.4-1.5 kg/dm3) while management with heavy bars did not degrade the physical properties of the soil compared with the rotary mowers and crop cover using tropical kudzu.
Abelhas africanizadas em área metropolitana do Brasil: abrigos e influências climáticas
Mello Maria Helena Silva Homem de,Silva Elisabete Aparecida da,Natal Delsio
Revista de Saúde Pública , 2003,
Abstract: OBJETIVO: Abelhas africanizadas s o mais agressivas, enxameiam várias vezes ao ano e utilizam grande variedade de locais para nidificar, diferentemente das européias. Tal comportamento proporciona maior contato com a popula o, o que pode aumentar o número de acidentes. Assim, realizou-se estudo com o objetivo de conhecer o comportamento dessas abelhas, assim como a identifica o de estratégias mais eficientes de manejo e orienta o à popula o. MéTODOS: A fonte de dados foi constituída de 3.061 registros de solicita es da popula o atendidas pelo Centro de Controle de Zoonoses do Município de S o Paulo, de 1994 a 1997, para retirada de colméias e enxames. Foram analisados locais mais freqüentes de instala o de col nias e pouso de enxames, além da correla o com variáveis climáticas. Para isso, utilizou-se o coeficiente de Pearson. RESULTADOS: Os valores diários apresentaram correla o positiva com temperatura média e grau de insola o, e negativa com umidade relativa e pluviosidade. As col nias instalaram-se preferencialmente em constru es artificiais; os enxames em árvores. CONCLUS ES: Períodos do ano com altas temperaturas e baixo índice pluviométrico est o relacionados a maior atividade das abelhas e maior número de enxames, propiciando maior contato com a popula o. Objetos como caixas e tambores n o devem ficar expostos; deve-se vedar forros e paredes, pois s o abrigos em potencial para col nias e enxames. áreas arborizadas servem de refúgio para enxames. Deve-se ter aten o em contato com áreas verdes e n o se deve manusear enxames.
Avalia o quantitativa e qualitativa da arboriza ao do bairro Santa Terezinha na cidade de Pato Branco (PR) / Qualitative and quantitative evaluation of the neighborhood urban forestry santa terezinha in the city of Pato Branco (PR)
Aquélis Armiliato Emer,Luana da Silva,Danielle Acco Cadorin,Nilvania Aparecida de Mello
Ambiência , 2013,
Abstract: O processo de urbaniza o rápido e desordenado trouxe consequências na dinamica dos elementos naturais responsáveis pelas condi es de qualidade ambiental, tais como solo, temperatura, flora e fauna. Neste sentido, a arboriza o viária adquire importancia como um dos fatores ligados a qualidade de vida da popula o. O objetivo desse trabalho foi avaliar a condi o da arboriza o viária do bairro Santa Terezinha em Pato Branco (PR). Foram analisadas todas as árvores presentes nas ruas do bairro, com diametro a altura do peito igual ou maior de 0,10 metros. As espécies foram identificadas e avaliadas quanto ao tipo de poda, presen a de injúrias, área livre de pavimenta o no entorno das árvores e altura da primeira bifurca o. Foram verificados 586 espécimes arbóreos no bairro analisado, compreendendo 31 espécies diferentes, contudo houve a predominancia da espécie Ligustro lucidum com 43,51% de frequência, seguida de Lagerstroemia indica com 15,18%. Dos exemplares arbóreos identificados, 83,18% eram de espécies exóticas, e destas 48,45% tinham o agravante de serem invasoras da regi o fitogeográfica local. Foi verificado que 62% das árvores n o haviam recebido poda e que entre as podas executadas a poda drástica foi a mais verificada com 22% das observa es. A maioria das injúrias observadas estava localizada no caule das plantas e na maioria dos casos eram provenientes da execu o das podas, 46,75% dos espécimes apresentavam-se sob área livre igual ou superior a 1 m2 e 53% dos indivíduos presentes na arboriza o do bairro apresentavam bifurca o menor que 1,8 metros e, portanto inadequadas para a arboriza o viária.
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