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Search Results: 1 - 10 of 38296 matches for " Cecílio Viega;Santos "
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Morphogenetic and tillering dynamics in Tanzania grass fertilized and non-fertilized with nitrogen according to season
Roma, Cláudio Fabrício da Cruz;Cecato, Ulysses;Soares Filho, Cecílio Viega;Santos, Geraldo Tadeu dos;Ribeiro, Ossival Lolato;Iwamoto, Bruno Shigueo;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000300013
Abstract: the objectives of this study were to evaluate morphogenetic characteristics and tillering dynamics in tanzania grass fertilized and non-fertilized with nitrogen, under intermittent grazing, in the spring and the summer. the main plots were composed of four nitrogen rates (0, 100, 200 and 300 kg/ha) and the subplots were growth seasons: spring (october, november and december) and summer (january, february and march). the experimental design was of randomized block with plots subdivided by time (seasons of the year) and four replications. urea was used as nitrogen supply and was divided into two applications: one in the spring and another in the summer. the experimental units fertilized with n rates of 200 and 300 kg/ha showed six cycles of pasture, with an average of 27 days of pasture interval, while the treatments with no fertilization and 100 kg/ha of n showed only four and five cycles of pasture, respectively. leaf elongation rate (ler) and the leaf appearance rate (lar) increased linearly with increasing of n rates. the greatest population density occurred in summer with the higher nitrogen rates. the treatment without n fertilization showed the lowest growth of tiller population, while the other treatments exhibited growth rates above 50% when compared with non-fertilized samples. nitrogen rates significantly affect the leaf appearance rate and the leaf elongation rate, as well as the number of live leaves in plants of tanzania grass in both spring and summer.
Crescimento, produtividade, caracteriza o e composi o química da aveia branca = Growth, productivity, characterization and chemical composition of white oat
Elmar Luiz Floss,Ana Luisa Palhano,Cecílio Viega Soares Filho,Linda M?nica Premazzi
Acta Scientiarum : Animal Sciences , 2007,
Abstract: Foi conduzido um experimento na Escola Superior de Agricultura Luiz deQueiroz, Piracicaba, Estado de S o Paulo, para avaliar o crescimento, produtividade, características morfológicas e fenológicas e a composi o química da aveia branca (Avena sativa L. cv. UPF 7). Os tratamentos constaram de épocas de cortes a cada 14 dias, dispostos ao acaso, com três repeti es. O acúmulo de matéria seca (MS) apresentou efeito quadrático, atingindo 12.240 kg ha-1 na matura o. O acúmulo máximo de proteína bruta (PB) ocorreu 98 dias após a emergência (DAE) (818 kg ha-1), sendo que o teor de PB e a digestibilidade in vitro da MS (DIVMS) decresceram de 24,9% e 82,2% aos 14 DAE para 4,9% e 36,8% na matura o, respectivamente. Aos 70 DAE a DIVMS foi de 68%, com rendimento de 3.693 kg ha-1 de MS, altura de plantas de 63 cm e teores de 18,9% de PB, 0,28% de Ca e 0,37% de P. A disponibilidade ótima de forragem para alimenta o animal (1.500 kg MS ha-1) foi estimada para 37 DAE, com as plantas apresentando altura de 33 cm, 21,4% de PB, 0,4% de P, 0,27% de Ca e uma DIVMS de 75,5%. A época indicada para utiliza o da aveia, considerando adisponibilidade de forragem e a DIVMS está entre 37 e 70 DAE. One experiment was carried out at Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, State of S o Paulo, with the purpose of evaluating growth, productivity, morphological and phenological characteristics and chemical composition of white oat (Avena sativa L. cv. UPF 7). The treatments were conducted during cutting timeseach 14 days, in a random design with three replications. A quadratic effect of time was observed on dry matter and crude protein accumulation, reaching maximum values at maturation (12,240 kg ha-1) and at 98 days after emergence (DAE) (818 kg ha-1), respectively. Crude protein concentration and in vitro dry matter digestibility (IVDMD) decreased with the time from 24.9 and 82.2% at 14 DAE to 4.9 and 36.8% at maturation, respectively. At 70 DAE, IVDMD was 68%, dry matter production was 3693 kg ha-1, plants height was 63 cm, CP, Ca and P were 18.9, 0.28 and 0.37% respectively. The optimum availability of forage estimated for 37 DAE through polynomial regression was 1,500 kg ha-1 (dry matter production), and at this time the forage showed the following characteristics: height of 33 cm, 21.4% CP, 0.4% P, 0.27% Ca and 75.5% IVDMD. The time suggested forthe utilization of this forage, according to the values of IVDMD and availability of forage varied from 37 to 70 DAE.
Fontes e doses de aduba o nitrogenada na atividade microbiana e fertilidade do solo cultivado com Brachiaria brizantha = Sources and levels of nitrogen fertilization on microbial activity and fertility in soil cropped with Brachiaria brizantha
Flavia Cristina Delbem,Márcia Helena Scabora,Cecílio Viega Soares Filho,Reges Heinrichs
Acta Scientiarum : Agronomy , 2011,
Abstract: As pastagens geralmente perdem seu potencial produtivo e vigor de rebrota nos primeiros anos, frequentemente associada à falta de aduba o nitrogenada. O objetivo deste foi verificar o efeito de fontes e doses de aduba o nitrogenada na atividade microbiana (carbono da biomassa microbiana e carbono do CO2 liberado) e na fertilidade do solo cultivado com Brachiaria brizantha cv. Xaraés. O delineamento experimental foi em blocos casualizados, em arranjo fatorial 3 x 4, envolvendo três fontes de nitrogênio (uréia, sulfato de am nio e Ajifer-L40) e quatro doses de nitrogênio (0, 100, 200 e 400 kg ha-1), nas profundidades 0 - 0,10 e 0,10 - 0,20 m, com trêsrepeti es. O aumento nas doses de nitrogênio, na camada 0,0 a 0,10 m de profundidade, reduziu os valores de pH, MO, K+, Ca2+, Mg2+, SB e V%. O Ajifer e a uréia elevaram os valores de Ca2+ na camada 0,10 - 0,20 m, e as doses de 100 e 200 kg ha-1 aumentaram os valores de Mg2+ e SB. Em doses elevadas o sulfato de am nio acidificou o solo. A perda de carbono pela elevada atividade microbiana pode estar relacionado ao estresse metabólico devido à acidifica o do solo.A aplica o de 100 kg ha-1 de nitrogênio acarretou as menores perdas de carbono pela atividade microbiana. Pastures usually lose their yield potential and re-growth energy in a few years, most often due to the lack of nitrogen fertilization. Theobjective of this study was to verify the effect of sources and levels of nitrogen (N) fertilization, under microbial activity (carbon of microbial biomass and carbon released as CO2) and fertilityof soil cropped with Brachiaria brizantha cv. Xaraés. The experimental design was randomized, organized under a 3 x 4 factorial scheme, with three nitrogen sources (urea, ammonium sulfate and Ajifer-L40) and four nitrogen levels (0, 100, 200 and 400 kg ha-1), analyzed on two depths (0 - 0,10 e 0,10-0,20 m), with 3 replications. The higher levels of N doses, the 0 - 0.10 m depths, reduced the values of pH, MO, K+, Ca2+, Mg2+, SB and V%. Ajifer and urea resulted in higher values of Ca2+, in the depths of 0.10 – 0.20 m, and the values of Mg2+ and SB exhibited high values with the doses of 100 and 200 kg ha-1 levels of N. The higher levels of ammonium sulfate resulted in soil acidification. Soil carbon loss, due to the high microbial activity, could be the result of metabolic stress caused by soil acidification. The application of 100 kg ha-1 of nitrogen was the best fertilizing level, considering the smaller loss of soil carbon by microbial activity.
Coloniza o micorrízica e fertilidade do solo submetido a fontes e doses de aduba o nitrogenada em Brachiaria brizantha = Mycorrhizal colonization and soil fertility under different sources and levels of nitrogen fertilization on Brachiaria brizantha
Flavia Cristina Delbem,Márcia Helena Scabora,Cecílio Viega Soares Filho,Reges Heinrichs
Acta Scientiarum : Agronomy , 2010,
Abstract: A viabiliza o e aumento da produ o de novas cultivares podem ser obtidos com a prática da aduba o nitrogenada. O objetivo desse trabalho foi verificar o efeito de fontes e doses de aduba o nitrogenada, em profundidades, na coloniza o micorrízica e na fertilidade do solo com Brachiaria brizantha cv. Xaraés. O delineamento experimental em blocos casualizados e os tratamentos em esquema fatorial 3 x 4, envolvendo três fontes de nitrogênio (ureia, sulfato de am nio e ajifer-L40), quatro doses (0, 100, 200 e 400 kg ha-1) estudadas em duas profundidades (0-0,10 e 0,10-0,20 m), com três repeti es. Por parcela, as amostras compostas, por cincoamostras simples de solo, foram coletadas, peneiradas, homogeneizadas e destinadas às análises. O uso do ajifer e da ureia proporcionou maior produtividade de massa seca da parte aérea de B. brizantha cv. Xaraés. Em contrapartida, esta sofre redu o à medida que as doses se elevaram. A melhor dose de aduba o foi a aplica o de 100 kg ha-1 de N. As doses mais elevadas de N, na camada 0 a 0,10 m de profundidade, determinam acidifica o do solo e reduzem os valores de MO, K+, Ca2+, Mg2+, SB e V%. A esporula o, mas n o coloniza o micorrízica, é sensivelmente estimulada em elevadas doses. The feasibility and increase in the production of new cultivars can be obtained with the practice of nitrogen fertilization. The objective of this study was to verify the effect of sources andlevels of nitrogen fertilization, concerning the depths, on the percentage of mycorrhizal colonization and soil fertility when covered by Brachiaria brizantha cv. Xaraés. A randomized blocks design was used and the treatments were under a 3 x 4 factorial scheme, regarding three nitrogen sources (urea, ammonium sulfate, and ajifer-L40) and 4 nitrogen levels (0, 100, 200 and 400 kg ha-1), studied at 2 different depths (0-0.10 and 0.10-0.20 m), with 3 replications. In each plot, the soil samples, composed of 5 simple samples, were collected, sieved, homogenized and sent for analysis. The use of ajifer and urea promoted higher production of shoot dry matter of B. brizantha cv. Xaraés. On the other hand, this dry matter showed reduction with the increase of N doses. The best fertilization dose was 100 kg ha-1 of N. The increasing doses of N employed, on the depth of 0-0.10 m, resulted in soil acidification and decreased thelevels of MO, K+, Ca2+, Mg2+, SB and V%. Sporulation, but not mycorrhizal colonization, was stimulated by higher applied dosages.
Doses and sources of nitrogen fertilizer and their effects on soil chemical properties and forage yield of Brachiaria brizantha cv. Xaraés Doses e fontes nitrogenadas e seus efeitos nos atributos químicos do solo e na produ o de forragem da Brachiaria brizantha cv. Xaraés
Reges Heinrichs,Cecílio Viega Soares Filho,Carlos Alberto Crociolli,Paulo Alexandre Monteiro de Figueiredo
Semina : Ciências Agrárias , 2012,
Abstract: Forage plants, particularly the Brachiaria genus, are the main source of nutrients for cattle and are at times the only feed offered. The concentration of elements in the plant is related to the soil, fertilization, climate, season, variety, and cultural practices. An experiment on dystrophic Red-Yellow Latosol soil in Ara atuba, S o Paulo was performed to evaluate the effects of the doses and sources of nitrogen fertilizers on the chemical properties of the soil and the dry matter yield of the grass Brachiaria brizantha cv. Xaraés. A randomized block design was employed involving three replicates in a 3 x 3 factorial, with three doses (100, 200 and 400 kg ha-1 year-1) and three sources (Ajifer L40, ammonium sulfate and urea) of nitrogen and a control treatment without nitrogen (zero). The greatest effects on the chemical properties of the soil as a function of nitrogen fertilization in the Xaraés grass were observed in the topsoil. The use of Ajifer L40 and ammonium sulfate as sources of nitrogen had similar effects, with an increase in the sulfur content and a reduction in the soil pH at the superficial layer. The use of the fertilizers Ajifer L40, ammonium sulfate and urea did not affect the micronutrient contents, except for Fe and Mn, and did not alter the sodium concentration or electrical conductivity of the soil. The dry matter yield of Xaraés grass was similar for all three nitrogen sources. As forrageiras, entre as quais se destaca o gênero Brachiaria, constituem a principal fonte de nutrientes para os bovinos e às vezes, o único alimento oferecido. A concentra o de elementos na planta está relacionada com o solo, a aduba o, o clima, a época, a variedade e as práticas culturais. Com o objetivo de avaliar os efeitos de doses e fontes nitrogenadas sobre os atributos químicos do solo e a produ o de massa seca do capim Brachiaria brizantha cv. Xaraés realizou-se um experimento em solo classificado como Latossolo Vermelho Amarelo distrófico, em Ara atuba, S o Paulo. Utilizou-se o delineamento experimental em blocos casualizados com 3 repeti es em esquema fatorial 3 x 3, sendo três doses de nitrogênio (100, 200 e 400 kg ha-1 ano-1) e três fontes (ajifer L40, sulfato de am nio, uréia), acrescido do tratamento controle com dose 0 (zero) de N. Os maiores efeitos nos atributos químicos do solo em fun o da aduba o nitrogenada no capim Xaraés foram observados na camada superficial do solo; as fontes nitrogenadas ajifer L40 e sulfato de am nio apresentaram comportamento semelhante, com aumento no teor de enxofre e redu o do pH do solo na camada
Fontes e doses de aduba??o nitrogenada na atividade microbiana e fertilidade do solo cultivado com Brachiaria brizantha
Delbem, Flavia Cristina;Scabora, Márcia Helena;Soares Filho, Cecílio Viega;Heinrichs, Reges;Crociolli, Carlos Alberto;Cassiolato, Ana Maria Rodrigues;
Acta Scientiarum. Agronomy , 2011, DOI: 10.4025/actasciagron.v33i2.3946
Abstract: pastures usually lose their yield potential and re-growth energy in a few years, most often due to the lack of nitrogen fertilization. the objective of this study was to verify the effect of sources and levels of nitrogen (n) fertilization, under microbial activity (carbon of microbial biomass and carbon released as co2) and fertility of soil cropped with brachiaria brizantha cv. xaraés. the experimental design was randomized, organized under a 3 x 4 factorial scheme, with three nitrogen sources (urea, ammonium sulfate and ajifer-l40) and four nitrogen levels (0, 100, 200 and 400 kg ha-1), analyzed on two depths (0 - 0,10 e 0,10-0,20 m), with 3 replications. the higher levels of n doses, the 0 - 0.10 m depths, reduced the values of ph, mo, k+, ca2+, mg2+, sb and v%. ajifer and urea resulted in higher values of ca2+, in the depths of 0.10 - 0.20 m, and the values of mg2+ and sb exhibited high values with the doses of 100 and 200 kg ha-1 levels of n. the higher levels of ammonium sulfate resulted in soil acidification. soil carbon loss, due to the high microbial activity, could be the result of metabolic stress caused by soil acidification. the application of 100 kg ha-1 of nitrogen was the best fertilizing level, considering the smaller loss of soil carbon by microbial activity.
Coloniza??o micorrízica e fertilidade do solo submetido a fontes e doses de aduba??o nitrogenada em Brachiaria brizantha
Delbem, Flavia Cristina;Scabora, Márcia Helena;Soares Filho, Cecílio Viega;Heinrichs, Reges;Ferrari, Tiago Augusto;Cassiolato, Ana Maria Rodrigues;
Acta Scientiarum. Agronomy , 2010, DOI: 10.4025/actasciagron.v32i3.4002
Abstract: the feasibility and increase in the production of new cultivars can be obtained with the practice of nitrogen fertilization. the objective of this study was to verify the effect of sources and levels of nitrogen fertilization, concerning the depths, on the percentage of mycorrhizal colonization and soil fertility when covered by brachiaria brizantha cv. xaraés. a randomized blocks design was used and the treatments were under a 3 x 4 factorial scheme, regarding three nitrogen sources (urea, ammonium sulfate, and ajifer-l40) and 4 nitrogen levels (0, 100, 200 and 400 kg ha-1), studied at 2 different depths (0-0.10 and 0.10-0.20 m), with 3 replications. in each plot, the soil samples, composed of 5 simple samples, were collected, sieved, homogenized and sent for analysis. the use of ajifer and urea promoted higher production of shoot dry matter of b. brizantha cv. xaraés. on the other hand, this dry matter showed reduction with the increase of n doses. the best fertilization dose was 100 kg ha-1 of n. the increasing doses of n employed, on the depth of 0-0.10 m, resulted in soil acidification and decreased the levels of mo, k+, ca2+, mg2+, sb and v%. sporulation, but not mycorrhizal colonization, was stimulated by higher applied dosages.
Methodology of calibration of TDR equipment to measure soil moisture
Roberto Avelino Cecílio,Delfran Batista dos Santos
Engenharia Ambiental : Pesquisa e Tecnologia , 2009,
Abstract: The use of TDR equipments is a rapid and accurate alternative to the determination of soil moisture. Nevertheless the use of this technique needs specific calibration for each soil. Calibration methods in use demands lots of time or soil to achieve calibration equations. This paper presents and evaluates an alternative calibration methodology to achieve TDR calibration equations in short times with the use a few soil. The calibration equation obtained to a Red-Yellow Latossol showed high trustu index (0,979) when it was applied to predict soil moisture of 11 soil columns prepared with different water contents. The results indicates that the calibration methodology has great potential to be applied.Keywords: dielectric constant, temperature, red-yellow latosol
Likely Rainfall for Alegre-ES by the Gamma Probability Distribution
Jo?o Paulo Bestete de Oliveira,Roberto Avelino Cecílio,Alexandre Candido Xavier,Andrea Pinheiro dos Santos Jasper
Engenharia Ambiental : Pesquisa e Tecnologia , 2010,
Abstract: The objective of this study was to estimate rainfall expected for Alegre-ES by the gamma distribution. We used rainfall data covering the period from 1940 to 2007. The parameters α and β of the gamma distribution were obtained by the method of maximum likelihood. Probable rainfall were obtained by the inverse function. We used the test of Kolmogorov-Smirnov test to check the fit of estimated to observed data. The results indicated that the gamma distribution provided a good fit to the data of rain to Alegre-ES can therefore be used to estimate the likely monthly rainfall.
Electromyographic analysis of the orbicularis oris muscle in oralized deaf individuals
Regalo, Simone Cecílio Hallak;Vitti, Mathias;Moraes, Maria Tereza Bagaiolo;Semprini, Marisa;Felício, Cláudia Maria de;Mattos, Maria da Glória Chiarello de;Hallak, Jaime Eduardo Cecílio;Santos, Carla Moreto;
Brazilian Dental Journal , 2005, DOI: 10.1590/S0103-64402005000300012
Abstract: electromyography has been used to evaluate the performance of the peribuccal musculature in mastication, swallowing and speech, and is an important tool for analysis of physiopathological changes affecting this musculature. many investigations have been conducted in patients with auditory and speech deficiencies, but none has evaluated the musculature responsible for the speech. this study compared the electromyographic measurements of the superior and inferior fascicles of the orbicularis oris muscle in patients with profound bilateral neurosensorial hearing deficiency (deafness) and healthy volunteers. electromyographic analysis was performed on recordings from 20 volunteers (mean age of 18.5 years) matched for gender and age. subjects were assigned to two groups, as follows: a group formed by 10 individuals with profound bilateral neurosensorial hearing deficiency (deaf individuals) and a second group formed by 10 healthy individuals (hearers). five clinical conditions were evaluated: suction, blowing, lip projection and compression, and production of the syllable "pa". it was found that the deaf patients presented muscle hyperactivity in all clinical conditions, and that the inferior fascicle of the orbicularis oris muscle showed higher electromyographic activity rates, suggesting the need for a hearing-speech treatment with emphasis on oral motricity.
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