oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 3 )

2019 ( 38 )

2018 ( 57 )

2017 ( 54 )

Custom range...

Search Results: 1 - 10 of 19988 matches for " Anacleto Ranulfo dos;Monteiro "
All listed articles are free for downloading (OA Articles)
Page 1 /19988
Display every page Item
Produ??o e perfilhamento de Brachiaria decumbens Stapf. em fun??o de doses de enxofre
Santos, Anacleto Ranulfo dos;Monteiro, Francisco Antonio;
Scientia Agricola , 1999, DOI: 10.1590/S0103-90161999000300025
Abstract: an experiment with brachiaria decumbens stapf. cv. basilisk in a sand subtrate was carried out under greenhouse conditions from october to december 1996. the objective was to determine the effect of sulfur fertilization (eight sulfur levels were used: 0; 2; 4; 16; 32; 48; 64 and 80 mg l-1 of solution) on the forage dry weight and tiller number. a randomized complete block design, with four replications, was used. at forty and seventy days after transplanting, the first and second harvest were performed. sulfur rates significantly increased grass shoot and root dry weight and influenced the tiller number in the plants.
Produ o e perfilhamento de Brachiaria decumbens Stapf. em fun o de doses de enxofre
Santos Anacleto Ranulfo dos,Monteiro Francisco Antonio
Scientia Agricola , 1999,
Abstract: O experimento foi realizado em casa-de-vegeta o em Piracicaba, S o Paulo, no período de outubro a dezembro de 1996, com Brachiaria decumbens Stapf. cv. Basilisk cultivada em solu o nutritiva e utilizando sílica como substrato. Foi empregado o delineamento de blocos completos ao acaso, com quatro repeti es. O primeiro corte das plantas foi efetuado 40 dias após transplante para os vasos, e o segundo corte 30 dias após o primeiro. Foram avaliadas oito doses de enxofre (0; 2; 4; 16; 32; 48; 64 e 80 mg L-1) na produ o de matéria seca e no número de perfilhos. As doses de enxofre proporcionaram aumentos na produ o de matéria seca da parte aérea e das raízes do capim-braquiária e influenciaram o número de perfilhos no segundo crescimento dessa forrageira.
Boron nutrition and yield of alfalfa cultivar crioula in relation to boron supply
Santos Anacleto Ranulfo dos,Mattos Waldssimiler Teixeira de,Almeida Ana Aparecida da Silva,Monteiro Francisco Antonio
Scientia Agricola , 2004,
Abstract: Alfalfa cultivar Crioula (Medicago sativa cv. Crioula) is grown in South Brazil and only a few studies on the plants' boron requirement are available. A greenhouse experiment was carried out with alfalfa to measure boron acquisition, production and distribution in the plant; data on critical level and production potentials were recorded. Plants were grown in ground quartz added with 1 L of solution, with the following boron rates: 0, 0.0625, 0.125, 0.25, 0.50, 1.00, and 2.00 mg L-1. Plants were harvested at 46 days of growth. Forage dry mass was increased by boron supply and dry matter accumulation was considerably low in control. Boron concentration in the leaves was higher than in the stems or roots. Boron utilization from the external solution reached 90% at 0.0625 mg L-1 and sharply decreased with further increasing boron rates. Boron concentration and content in the leaves and in plant tops were at maximum when applied boron was between 1.5 and 1.6 mg L-1. Critical levels of boron in plant were 61 mg kg-1 in the leaves and 39 mg kg-1 in plant tops for this cultivar of alfalfa.
Boron nutrition and yield of alfalfa cultivar crioula in relation to boron supply
Santos, Anacleto Ranulfo dos;Mattos, Waldssimiler Teixeira de;Almeida, Ana Aparecida da Silva;Monteiro, Francisco Antonio;Corrêa, Beatriz Dias;Gupta, Umesh C.;
Scientia Agricola , 2004, DOI: 10.1590/S0103-90162004000500006
Abstract: alfalfa cultivar crioula (medicago sativa cv. crioula) is grown in south brazil and only a few studies on the plants' boron requirement are available. a greenhouse experiment was carried out with alfalfa to measure boron acquisition, production and distribution in the plant; data on critical level and production potentials were recorded. plants were grown in ground quartz added with 1 l of solution, with the following boron rates: 0, 0.0625, 0.125, 0.25, 0.50, 1.00, and 2.00 mg l-1. plants were harvested at 46 days of growth. forage dry mass was increased by boron supply and dry matter accumulation was considerably low in control. boron concentration in the leaves was higher than in the stems or roots. boron utilization from the external solution reached 90% at 0.0625 mg l-1 and sharply decreased with further increasing boron rates. boron concentration and content in the leaves and in plant tops were at maximum when applied boron was between 1.5 and 1.6 mg l-1. critical levels of boron in plant were 61 mg kg-1 in the leaves and 39 mg kg-1 in plant tops for this cultivar of alfalfa.
Rochas silicáticas portadoras de potássio como fontes do nutriente para as plantas solo
Ribeiro, Luciano da Silva;Santos, Anacleto Ranulfo dos;Souza, Luiz Francisco da Silva;Souza, Jamile Santana;
Revista Brasileira de Ciência do Solo , 2010, DOI: 10.1590/S0100-06832010000300030
Abstract: this greenhouse study evaluated the effect of potassium-rich silicate rocks (alkaline ultramaphic, pyroclastic breccia and phlogopite) on the release of k and other chemical nutrients of the soil. a yellow latossol with 0.03 cmolc dm-3 k soil was used in the study. the rocks were tested at doses of 75, 150, 225 and 300 kg ha-1 k2o with and without lime, applied to increase the soil base saturation (v-value) to 70 %. the rock and lime materials were mixed with the soil in the pots, watered to 80 % of the soil field capacity and incubated for 45 days. an additional pot containing soil and kcl, the reference k source, was also incubated. after incubation, soybean was sown to evaluate the effect of rock dissolution in a cultivation environment. plants were harvested 50 days after sowing. potassium was released in greatest amounts to the soil from ultramafic alkaline and pyroclastic breccia. liming did not influence the rock dissolution process and k release.
Photosynthetic pigments content, photosynthesis rate and chloroplast structure in young plants of Mikania laevigata Schultz Bip. ex Baker grown under colored nets Teores de pigmentos fotossintéticos, taxa de fotossíntese e estrutura de cloroplastos de plantas jovens de Mikania laevigata Schultz Bip. ex Baker cultivadas sob malhas coloridas
Girlene Santos de Souza,Evaristo Mauro de Castro,?ngela Maria Soares,Anacleto Ranulfo dos Santos
Semina : Ciências Agrárias , 2011,
Abstract: Guaco (Mikania laevigata) is a medicinal plant used to treat fever, rheumatism, flu and respiratory tract diseases. Understanding the physiology of this species and its responses to environmental conditions has become necessary to improving the cultivation methods. In this context, this work aimed to access the effects of shading by using colored nets in on photosynthetic pigment concentration, photosynthetic rate and ultrastructure of chloroplasts of Mikania laevigata. The plants were cultivated during four months under nets with 50% shading in blue, red and gray color nets and under full sunlight (0%). The plants grown under full sunlight had decreased contents of a and b chlorophyll, and of carotenoids, while those grown under blue nets shown higher concentrations of a and b chlorophyll. The lowest density of chloroplasts was found in plants cultivated under full sunlight. Elongated chloroplasts were noticed in treatments with 50% shading. Regarding the potential rate of photosynthesis no significant change was observed among the plants grown under red, blue and gray nets, which leads to the conclusion that the spectrum transmitted by different coloured nets did not affect guaco photosynthetic apparatus. O guaco (Mikania laevigata) é uma planta medicinal, usada para o tratamento de febre, reumatismo, gripe e doen as do trato respiratório. O entendimento do comportamento fisiológico dessa espécie e as suas respostas às condi es do ambiente tornam-se necessários ao aperfei oamento dos métodos de cultivo. Nesse contexto, o presente trabalho teve como objetivo avaliar os efeitos do sombreamento com uso de malhas coloridas na concentra o de pigmentos fotossintéticos, na taxa de fotossíntese e na ultra-estrutura de cloroplastos de plantas de Mikania laevigata. As plantas foram cultivadas por quatro meses sob malhas de 50% de sombreamento nas cores azul, vermelha e cinza e a pleno sol (0%). As plantas mantidas a pleno sol tiveram os menores teores de clorofila a e b e o menor teor de carotenóides, enquanto aquelas cultivadas sob malha azul tiveram a maior concentra o de clorofilas a e b. A menor densidade de cloroplastos foi encontrada nas plantas cultivadas a pleno sol. Nos tratamentos com 50% de sombreamento, foram verificados cloroplastos mais alongados. Com rela o à taxa de fotossíntese potencial, n o foi observada nenhuma diferen a significativa entre plantas crescidas sob as malhas vermelha, cinza e azul, fato que leva a acreditar que o espectro diferenciado transmitido pelas malhas coloridas n o interferiu no aparelho fotossintético do guaco.
Nutrient content and redistribution in leaves of Hevea brasiliensis and Pinus oocarpa / Concentra o e redistribui o de nutrientes em folhas de Hevea brasiliensis e Pinus oocarpa
Maria do Rosário Lobato Rodrigues,Carmen Silvia Vieira Janeiro Neves,Alexandre Silva,Anacleto Ranulfo dos Santos
Semina : Ciências Agrárias , 2000,
Abstract: The content of macronutrients (N, P, K, Ca, Mg, and S) and nutrient redistribution were evaluated in leaves of two species, an 8 years old angiosperm (Hevea brasiliensis) and a 25 years old a gymnosperm (Pinus oocarpa), both cultivated on an eutrophic Red Brown Earth (Alfissol). Leaves were collected at three different phenological states: young, mature, senescent and from the litterfall. The nutrient content of Hevea was higher, presenting 3 to 4 times higher concentrations of N, P, K and Ca suggesting that the pine had greater capacity of producing biomass with a relatively low amount of nutrients. In Pinus oocarpa 43% ofN, 65% of P and 75% of K was transferred from old to young leaves while, for Hevea, the nutrient return was 59%> for N, 65% for P and 60% for K. Avaliou-se a concentra o dos macronutrientes N, P, K, Ca, Mg e S nas folhas de uma angiosperma (Hevea brasiliensis) e de uma gimnosperma (Pinus oocarpa), com 8 e 25 anos de idade, respectivamente, cultivadas sobre Terra Roxa Estruturada eutrófica (Alfissolo). Avaliou-se também a redistribui o de nutrientes. Foram coletadas amostras de folhas jovens, maduras, senescentes e do folhedo. Os teores dos elementos analisados nas folhas da seringueira foram significativamente superiores aos das acículas do pinheiro, chegando a valores 3 a 4 vezes maiores para N, P, K e Ca, confirmando a elevada capacidade do pinheiro de produzir biomassa, com menor quantidade relativa de nutrientes. Para Pinus oocarpa , estimou-se que 43% de N, 65% de P e 75% de K foram redistribuídos das aciculas recém-caídas para acículas jovens. Em Hevea brasiliensis, estimou-se que 59% de N, 65% dePe 60% de K foram redistribuídos das folhas recém-caídas para as folhas jovens.
Efeito das intera??es entre os íons am?nio e nitrato na fisiologia do crescimento do amendoinzeiro
Ribeiro, Marcos de Oliveira;Boechat, Cácio Luiz;Concei??o, Maria das Gra?as da Silva;Moreira, Flavia Melo;Ribeiro, Lucas de Oliveira;Santos, Anacleto Ranulfo dos;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000500008
Abstract: peanut is a crop of great importance for the northeast region, as it is usually grown by small farmers, who on average, do not exceed 10 ha of cultivated area and aim to increase its profitability and diversify the production. this study aimed to evaluate the effect of the relationship between nitrogen forms (ammonium and nitrate) in the initial growth of peanuts. complete nutrient solution was used with a single concentration of 210 mg n l-1 provided in five proportions of nh4+:no3-: 100:0, 75:25, 50:50, 25:75 and 0:100. the experimental units were arranged in completely randomized design, with four replications. the variables evaluated were: shoot length, root length, leaf number, stem diameter, fresh and dry shoot and fresh weight and dry root. the 100:0, 75:25 and 50:50 ratio resulted in decreasing peanut phytomass by ammonium toxicity. however, the 0:100 ratio, nitrate caused a smaller decreased compared to reductions in the highest ammonium concentrations. in the 25:75 and 0:100 ratio, plants grow normally with higher phytomass. the supply of nitrogen in the nh4+ form only is not a good option for the nutrition of peanuts in early growth stages.
O p?o do direito à educa??o?
Monteiro, Agostinho dos Reis;
Educa??o & Sociedade , 2003, DOI: 10.1590/S0101-73302003000300003
Abstract: this paper unfolds the following arguments: the right to education is a priority right. it is not a right to mediocre education, but to an education fashioned with the quality of a human right. driven by the world globalization, neo-liberalism is an economical ideology whose business logic is adverse to the human rights ethics. the alternative to the neo-liberal globalization is to achieve the right to develop as a "meta-right", that is, the right to a development process that respects and favors the fulfillment of all the rights. respecting, protecting and fulfilling all the human rights and especially the right to education is the main obligation of the rule of law. the right to education is a new paradigm to rethink education, transfigure school and re-create the identity of the education professionals.
O p o do direito à educa o?
Monteiro Agostinho dos Reis
Educa??o & Sociedade , 2003,
Abstract: O direito à educa o é um direito prioritário, mas n o é direito a uma educa o qualquer: é direito a uma educa o com qualidade de "direito do homem". O neoliberalismo, potenciado pela globaliza o do mundo, é uma ideologia económica cuja lógica mercantilista é adversa à ética dos direitos do ser humano. A alternativa à globaliza o neoliberal está na realiza o do direito ao desenvolvimento como meta-direito, isto é, direito a um processo de desenvolvimento que respeite e favore a a realiza o de todos os direitos. Respeitar, proteger e realizar todos os direitos do ser humano, e o direito à educa o em particular, é a principal obriga o de um Estado de Direito. O direito à educa o é um paradigma novo para repensar a educa o, transfigurar a escola e recriar a identidade dos profissionais da educa o.
Page 1 /19988
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.