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Search Results: 1 - 10 of 190599 matches for " Martins Rubens de Oliveira "
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Indivíduo e sociedade no discurso da política de ensino superior
Martins, Rubens de Oliveira;
Sociologias , 2001, DOI: 10.1590/S1517-45222001000200006
Abstract: this essay is an effort to understand some of society's views within the process of building official discourses legitimating public policies for higher education. its starting point is a reflection that expresses the theoretical and methodological references of the classical opposition between individual and society in sociological theory.
Belle époque literária e modernismo: Oswald de Andrade, intelectual entre dois mundos
Martins, Rubens de Oliveira;
Sociedade e Estado , 2000, DOI: 10.1590/S0102-69922000000200004
Abstract: this article is a essay to understand the limits of the autonomy of intellectual life in s?o paulo, in the early years of the 20th century. following the track from the modernist writer oswald de andrade, his participation in the bohemian groups from rio de janeiro and in the modernist group from s?o paulo in 1922, we will analyze how works the process of institutionalization of culture in terms of building a new pattern to permit recognition and legitimization for intellectual life.
Indivíduo e sociedade no discurso da política de ensino superior
Martins Rubens de Oliveira
Sociologias , 2001,
Abstract: Este ensaio busca compreender algumas das vis es de sociedade presentes no processo de constru o dos discursos oficiais que legitimam as atuais políticas públicas de educa o superior, a partir de uma reflex o que explicite os referenciais teóricos e metodológicos da oposi o clássica entre indivíduo e sociedade na teoria sociológica.
Permanência e movimento: um olhar sobre o processo de constru o das diretrizes curriculares para o ensino superior no contexto das políticas do MEC
Rubens de Oliveira Martins
Sociedade e Estado , 2004, DOI: 10.1590/s0102-69922004000100018
Abstract:
Effect of the application of different water depths and nitrogen and potassium doses on quality of Tanzania grass
Oliveira Filho, Jair da C.;Oliveira, Rubens A. de;Oliveira, Ednaldo M. de;Cecon, Paulo R.;Martins, Carlos E.;
Engenharia Agrícola , 2012, DOI: 10.1590/S0100-69162012000400007
Abstract: the objective of this study was to evaluate the effects of the application of different water depths and nitrogen and potassium doses in the quality of tanzania grass, in the southern of the state of tocantins. the experiment was conducted on strips of traditional sprinklers, and used, as treatments, a mixture of fertilizer combinations of n and k2o always in the ratio of 1 n:0.8 k2o. this study determined throughout the experiment: plant height (ph), the crude protein (cp) and neutral detergent fiber (ndf). the highest plant height obtained was 132.4 cm, with a fertilizer dose of 691.71 kg ha-1 in the proportion of n:0.8 k2o, in other words, 384.28 kg ha-1 of n and 307.43 kg ha-1 of k2o, and water depth of 80% of the etc. the highest crude protein content was 12.2%, with the fertilizer dose application of 700 kg ha-1 yr-1 in the proportion of 1 n to 0.8 of k2o, in other words, 388.89 kg ha-1 of n and 311.11 kg ha-1 of k2o and absence of irrigation. the lowest level of neutral detergent fiber was 60.7% with the application of the smallest dose of fertilizer and highest water depth. it was concluded in this study that there was an increase in plant height by increasing the fertilizer dose and water depth. the crude protein content increased 5.4% in the dry season, by increasing the fertilizer dose and water depth. in the dry season, there was an increase of ndf content by 4.5% by increasing the application of fertilizer and water depth.
Características químicas de solo submetido ao tratamento com esterco líquido de suínos e cultivado com gramíneas forrageiras
Queiroz, Flávia Martins de;Matos, Ant?nio Teixeira de;Pereira, Odilon Gomes;Oliveira, Rubens Alves de;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000500024
Abstract: in this study, the effect of intensive swine liquid manure (slm) application was evaluated through the overland flow method, on chemical characteristics of a yellow-red podzolic soil (ultisol) cultivated with four forage species: amazonian kikuyu grass (brachiaria humidicola (rendle) schweick), signal grass (brachiaria decumbens stapf), coastcross bermudagrass (cynodon dactylon (l.) pers.) and tifton 85 bermudagrass (cynodon spp.) were evaluated. slm was applied in plots of 4m2 and with 5% slope, during four months, at an average equivalent to 800 kg ha-1d-1 of biochemical oxygen demand (bod5). soil samples were collected at 0-0,20 m depth, in the beginning and at the end of the experiment. the result showed the increase of the p, k, na and zn concentrations while the mg and cu concentrations decreased and ca continued unaltered. the acidity, sum of bases and cec increased in the soil that received slm, while the saturation of bases decreased. due to the nourishiment accumulation, it is recommended to monitor the soil chemical characteristcs and underground water on the profile for evaluation of the enviromental contamination risks.
Características químicas de solo submetido ao tratamento com esterco líquido de suínos e cultivado com gramíneas forrageiras
Queiroz Flávia Martins de,Matos Ant?nio Teixeira de,Pereira Odilon Gomes,Oliveira Rubens Alves de
Ciência Rural , 2004,
Abstract: Avaliou-se, neste trabalho, o efeito da aplica o intensiva de esterco líquido de suínos (ELS), pelo método do escoamento superficial, nas características químicas de um solo Podzólico Vermelho-Amarelo cultivado com quatro espécies forrageiras: quicuio da Amaz nia (Brachiaria humidicola (Rendle) Schweick), braquiária (Brachiaria decumbens Stapf), coastcross (Cynodon dactylon (L.) Pers.) e tifton 85 (Cynodon spp.). O ELS foi aplicado em parcelas de 4m2 e com 5% de declividade, durante 4 meses, na taxa média equivalente a 800kg ha-1d-1 de demanda bioquímica de oxigênio (DBO5). Para caracteriza o química, amostras de solo foram coletadas à profundidade de 0-0,20m, antes de iniciar o experimento e após o término dele. A aplica o de ELS proporcionou acúmulo de P, K, Na e Zn no solo, enquanto as concentra es de Mg e Cu diminuíram e a de Ca se manteve inalterada. Houve aumento na acidez, na soma de bases, na CTC e redu o na satura o por bases. Devido ao acúmulo de nutrientes, recomenda-se monitoramento das características químicas do solo, ao longo de seu perfil e das águas subterraneas para que se avaliem riscos de contamina o ambiental.
Yield of six grasses cultivated by grazing under effect of different nitrogen fertilization and annual seasons Produ o de seis capins manejados por pastejo sob efeito de diferentes doses nitrogenadas e esta es anuais
Carlos Augusto Brasileiro de Alencar,Rubens Alves de Oliveira,Ant?nio Carlos Cóser,Carlos Eugênio Martins
Revista Brasileira de Saúde e Produ??o Animal , 2010,
Abstract: Dry matter yield of six irrigated grasses cultivated by grazing under different nitrogen fertilization and annual seasons in Brazil. The experiment was conducted in a split plot design, tends a factorial design 4 x 6 (nitrogen and grasses) in the plots and season (autumn/winter and spring/summer) in the split-plots, in a completely randomized block, with four repetitions. The nitrogen doses were of 100; 300; 500 and 700kg/ha/ano and the grasses were: Xaraes, Momba a, Tanzania, Pioneiro, Marandu and Estrela. The irrigation system was semi-fixed conventional sprinkling. The dry matter yield was obtained by means of the dry material in ventilated stoves at 60°C, for 72h. The appraised grasses presented different dry matter yield. The factor temperature was the responsible for the differences among seasons. The increase of the nitrogen fertilizer did not affect the dry matter yield due to methodology for its determination and for the degradation of the physical quality of the soil. It was observed, in the general, that the Xaraes, Tanzania and Momba a presented larger, and Pioneiro, smaller dry matter yield, respectively. The highest temperatures happened in the spring/summer season and provided larger dry matter yield. The nitrogen fertilization did not influence the dry matter yield of the appraised grasses. Objetivou-se avaliar a produtividade de matéria seca de seis capins irrigados manejados por pastejo sob efeito de diferentes aduba es nitrogenadas e esta es anuais na regi o Leste do estado de Minas Gerais. O experimento foi conduzido em parcelas subdivididas, com um esquema fatorial 4 x 6 (doses de nitrogênio e capins), e nas subparcelas as esta es do ano (outono/inverno e primavera/ver o) foram avaliadas no delineamento em blocos casualizados, com quatro repeti es. As doses nitrogenadas foram de 100; 300; 500 e 700kg/há/ano, e os capins foram Xaraés, Momba a, Tanzania, Pioneiro, Marandu e Estrela. O sistema de irriga o utilizado foi aspers o convencional semifixo. A produtividade foi obtida por meio do material seco em estufa ventilada a 60°C, por 72h. Os capins avaliados apresentaram diferentes produtividades de matéria seca. O fator temperatura foi o responsável pelas diferen as encontradas entre esta es. O aumento da dose nitrogenada n o afetou a produtividade de matéria seca devido à metodologia para sua determina o e pela degrada o da qualidade física do solo. Os capins Xaraés, Tanzania e Momba a apresentaram maiores, e o Pioneiro apresentou menor produtividade de matéria seca, respectivamente. As maiores temperaturas ocorridas na esta
VALOR NUTRITIVO DE GRAMíNEAS FORRAGEIRAS TROPICAIS IRRIGADAS EM DIFERENTES éPOCAS DO ANO NUTRITIVE VALUE OF IRRIGATED TROPICAL FORAGE GRASSES in DIFFERENT SEASONS
Carlos Augusto Brasileiro de Alencar,Rubens Alves de Oliveira,Ant?nio Carlos Cóser,Carlos Eugênio Martins
Pesquisa Agropecuária Tropical , 2009, DOI: 10.5216/pat.v40i1.3994
Abstract: Objetivou-se avaliar a composi o bromatológica e a digestibilidade in vitro da matéria seca (DIVMS), em seis capins manejados por pastejo, sob efeito de diferentes laminas de irriga o e esta es do ano. O experimento foi conduzido em delineamento inteiramente casualizado, no esquema de parcelas subsubdivididas, com duas repeti es, tendo nas parcelas seis gramíneas (Xaraés, Momba a, Tanzania, Pioneiro, Marandu e Estrela), nas subparcelas seis laminas de irriga o (0%, 18%, 45%, 77%, 100% e 120% da referência) e nas subsubparcelas as esta es outono/inverno e primavera/ver o. Para diferenciar a aplica o das laminas de irriga o, utilizou-se o sistema por aspers o em linha. Foram avaliados os teores de proteína bruta (PB), fibra em detergente neutro (FDN) e a DIVMS. Maiores teores de PB e DIVMS foram encontrados no outono/inverno e maiores teores de FDN na primavera/ver o. As laminas de irriga o influenciaram a DIVMS dos capins Xaraés, Momba a e Estrela e n o alteraram os teores de PB e FDN. O capim Pioneiro apresentou maiores e menores teores de PB e FDN, respectivamente. Os capins Xaraés e Estrela apresentaram maiores e menores DIVMS, respectivamente. PALAVRAS-CHAVE: Aspers o em linha; fibra em detergente neutro; proteína bruta. Bromatological composition and in vitro dry matter digestibility (IVDMD) of six forage grasses, under different irrigation depths and seasons, were evaluated. The experiment was carried out in a completely randomized arrangement, with two replications, in a split-split plot design. Six grass species (Xaraés, Momba a, Tanzania, Pioneiro, Marandu, and Estrela) constituted the plots, six irrigation depths (0%, 18%, 45%, 77%, 100%, and 120% of the reference) the split-plots, and two seasons (autumn/winter and spring/summer) the split-split-plots. In order to vary irrigation depths, a line source sprinkler system was used. Raw protein (RP), neutral detergent fiber (NDF), and IVDMD were evaluated. Higher RP and IVDMD levels were found in autumn/winter and higher NDF in spring/summer. Irrigation depths affected Xaraés, Momba a, and Estrela IVDMD, but did not affect their RP and NDF. Pioneiro presented higher RP and lower NDF, while Xaraés and Estrela presented higher and lower IVDMD, respectively.
Altura de capins e cobertura do solo sob aduba o nitrogenada, irriga o e pastejo nas esta es do ano = Grass height and soil cover under nitrogen fertilization, irrigation and grazing during the seasons of the year
Carlos Augusto Brasileiro de Alencar,Ant?nio Carlos Cóser,Carlos Eugênio Martins,Rubens Alves de Oliveira
Acta Scientiarum : Agronomy , 2010,
Abstract: Objetivou-se avaliar a altura de planta e a cobertura do solo de seis capins irrigados manejados por pastejo sob efeito de diferentes aduba es nitrogenadas e esta es do ano. O experimento foi conduzido em esquema de parcelas subdivididas, tendo nas parcelas um esquema fatorial 4 x 6 (doses de nitrogênio e forrageiras) e nas subparcelas as esta es do ano (outono/inverno e primavera/ver o) no delineamento em blocos casualizados, com quatro repeti es. As doses nitrogenadas foram de 100, 300, 500 e 700 kg ha-1 ano-1, e as forrageiras foram: Xaraés, Momba a, Tanzania, Pioneiro, Marandu e Estrela. A altura foi medida desde o solo até as extremidades das folhas e a cobertura estimada visualmente por três observadores. Observou-se efeito dos capins, aduba o nitrogenada e esta es do ano nas característicasavaliadas. Os capins Estrela e Tanzania proporcionaram maior e menor cobertura, respectivamente. Os capins Pioneiro e Marandu apresentaram maior e menor altura, respectivamente. As maiores temperaturas ocorridas nas esta es primavera/ver o proporcionaram maior altura de planta, porém n o afetaram a cobertura. O aumento da aduba o nitrogenada pouco influenciou as características avaliadas nas esta es outono/inverno: houve redu o da cobertura e aumento da altura do capim-Xaraés. Nas esta es primavera/ver o, houve redu o da cobertura e da altura do capim-Pioneiro e somente da altura do capim-Estrela. This study aimed to evaluate the soil cover and plant height of six irrigated grasses under different levels of nitrogen fertilization over the seasons of the year. The experiment was carried out in a split-plot design, with a 4 x 6 factorial scheme (nitrogen and grasses) in the sub-plots and the seasons (autumn/winter and spring/summer), in randomized blocks, with four repetitions. The nitrogen doses were 100, 300, 500 and 700 kg ha-1 year-1 and the grasses were: Xaraes, Momba a, Tanzania, Pioneiro, Marandu and Estrela. The height was measured from the soil to the extremities of the leaves, and the soil cover was visually estimated by three observers. Effects of the grasses, nitrogen and seasons of the year were observed on the two evaluated characteristics. The Estrela and Tanzania grasses provided the largest and smallest soil cover, respectively. Pioneiro and Marandu presented the highest and lowest height, respectively. The highest temperatures in the spring/summer season caused higher plant height, but they did not affect soil cover. The increase in nitrogen dosages had little influence on the appraised characteristics in the autumn/winter season: th
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