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Search Results: 1 - 10 of 33703 matches for " Antonio Evami Cavalcante;Gheyi "
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Salinidade da água de Irriga o na Aclimatiza o de Mudas, Desenvolvimento e Produ o de Heliconias
Antonio Evami Cavalcante Sousa,Frederico Antonio Loureiro Soares,Hans Raj Gheyi,Helder Morais Mendes Barros
Revista Brasileira de Agricultura Irrigada , 2011, DOI: 10.7127/rbai.v5n400067
Abstract: A utiliza o de águas com altos níveis de condutividade elétrica comumente encontrados no final do período de estiagem, trás sérios riscos de saliniza o para os solos a serem irrigados, causando prejuízos, para as culturas. O objetivo deste trabalho foi avaliar os efeitos da salinidade da água de irriga o sobre aclimatiza o de mudas, crescimento, desenvolvimento e produ o de seis genótipos de heliconias. O experimento foi conduzido em casa de vegeta o, município de Campina Grande-PB. A pesquisa foi realizada em duas etapas, sendo a primeira utilizando seis níveis de condutividades da água de irriga o CEa (0,3; 0,8; 1,3; 1,8; 2,3 e 2,8 dS m-1) e seis genótipos de heliconias, compondo um esquema fatorial (6 x 6). Para a segunda etapa observou-se, três níveis (CEa de 0,8; 1,8; e 2,8 dS m-1) em dois tipos de forma es de mudas de seis genótipos de heliconias compondo esquema fatorial triplo (3 x 2 x 6), ambos em delineamento experimental de bloco ao caso, com três repeti es. Nas variáveis de crescimento da primeira etapa, o genótipo Latispatha de médio porte foi maior ao genótipo Rostrata e as de pequeno porte Golden Torch, Nickeriensis, Sassy e Red Opol n o houve diferen a significativa entre elas. Entre as variáveis de crescimento da segunda etapa, o genótipo que melhor desenvolveu-se foi a Nickeriensis e as que desenvolveram-se menos na variável número de folhas foi o genótipo Latispatha, em altura de plantas a Sassy e em diametro do pseudocaule foram os genótipos Rostrata e Latispatha
Gas exchange and nutrient content in leaves of physic nut irrigated with wastewater and doses of phosphorus Trocas gasosas e teor de nutrientes em folhas de pinh o manso irrigado com água residuária e doses de fósforo
Antonio Evami Cavalcante Sousa,Claudivan Feitosa de Lacerda,Hans Raj Gheyi,Frederico Antonio Loureiro Soares
Semina : Ciências Agrárias , 2012,
Abstract: With the objective of evaluating leaf gas exchange and nutrient concentration in plants of Physic nut irrigated with wastewater of domestic origin an experiment was conducted in protected ambient adopting randomized block in factorial layout, to study the effects of five levels of hydric reposition – HR (0.25; 0.50; 0.75; 1.00 and 1.25 times of water consumed by the plant), and two levels of phosphorus (135 and 200 g P2O5 plant-1 year-1) with four repetitions. The data of leaf gas exchange were obtained using a portable photosynthesis meter (IRGA). To determine the nutrient content of the plant, fourth and fifth leaves below the inflorescence was used. The reduction in water supply provoked reduction in the rate of carbon assimilation, limiting the production capacity of the Physic nut plants. The increase in level of hydric reposition with wastewater resulted increase in leaf gas exchange, notably in the rate of carbon assimilation. The accumulation of the nutrient follows the sequence: N > K > Ca > Na > Cl > Mg > P > S > Fe > Mn > Zn > Cu, and with the increase of water supply the leaf contents of phosphorus, zinc and copper increased. The doses of P2O5 did not influence the contents of studied elements. Com o objetivo de avaliar trocas gasosas e teores de minerais em plantas de pinh o manso irrigadas com água residuária de origem doméstica foi conduzido um ensaio em ambiente protegido adotando-se um delineamento em blocos casualizados em um fatorial com cinco níveis de reposi o hídrica (0,25; 0,50; 0,75; 1,00 e 1,25 do consumo de água pela planta) e duas doses de P2O5 (135 e 200 g planta-1) por ano com quatro repeti es. Os dados de trocas gasosas foliares foram obtidos utilizando-se medidor portátil de fotossíntese (IRGA). Para determinar o teor de nutrientes da planta, utilizou-se o limbo foliar localizado entre a quarta e quinta folha abaixo da inflorescência. A redu o da reposi o hídrica provocou diminui o na taxa de assimila o de carbono, limitando a capacidade produtiva das plantas de pinh o manso. O incremento na reposi o hídrica com água residuária proporcionou incremento nas trocas gasosas foliares, notadamente na taxa de assimila o de carbono. Verificou-se que o acúmulo dos elementos segue a sequência: N > K > Ca > Na > Cl > Mg > P > S > Fe > Mn > Zn > Cu, e com o aumento da reposi o hídrica, o fósforo, o zinco e o cobre aumentaram suas concentra es no limbo foliar. As doses de P2O5 aplicadas n o influenciaram os teores de nenhum dos elementos estudados.
Componentes de produ??o de pinh?o manso irrigado com água de diferentes condutividades elétrica e doses de fósforo
Sousa, Antonio Evami Cavalcante;Gheyi, Hans Raj;Soares, Frederico Antonio Loureiro;Nobre, Reginaldo Gomes;Nascimento, Elka Costa Santos;
Ciência Rural , 2012, DOI: 10.1590/S0103-84782012000600009
Abstract: the physic nut has attracted considerable interest in recent years because of the high potential to provide oil for biofuel production and this has caused the rapid expansion of cultivated area worldwide. this research aimed to evaluate the influence of irrigation with water of different electrical conductivity (ecw) and two doses of phosphorus on the production components of physic nut during the third year of production. a randomized block design in a factorial (5x2) was adopted with four repetitions, with five levels of salinity (ecw - 0.6 control; 1.2; 1.8; 2.4 and 3.0ds m-1) of the irrigation water and two doses of p2o5 (135 and 200g plant-1 year-1), in which the water of 0.6ds m-1 refers to municipal supply water and the dose of 135g plant-1 is the recommended dose for physic nut. plants were cultivated in recipient of 200l and irrigated at intervals of three days. the number of days for inflorescence, number of clusters plant-1, grain yield and oil content of physic nut seeds were negatively affected by the increasing salinity of the irrigated water. the cultivation of physic nut irrigated with electrical conductivity of 1.3ds m-1 reduces the productivity by 10% and consequently the seed oil content. only the number of days for inflorescence was affected by phosphorus doses. a positive and significant correlation between weight of 100 seeds and oil content of seeds was observed and in the treatment with the lowest ecw the values obtained were respectively 90.26g and 36.39%.
Teor de óleo no pinh?o manso em fun??o de laminas de água residuária
Sousa, Antonio Evami Cavalcante;Gheyi, Hans Raj;Soares, Frederico Antonio Loureiro;Medeiros, Everaldo Paulo de;Nascimento, Elka Costa Santos;
Pesquisa Agropecuária Brasileira , 2011, DOI: 10.1590/S0100-204X2011000100015
Abstract: the objective of this work was to study the influence of different levels of wastewater and two doses of phosphorus on the productivity and oil content of physic nut seeds. a randomized design in a 5x2 factorial arrangement was used, with four replicates with one plant per plot. treatments consisted of a combination of five levels of irrigation depths (0.25, 0.50, 0.75, 1.00 and 1.25 of water consumption) and two doses of p2o5 (135 and 200 g per plant) per year. the productivity and oil content of the seeds were positively and significantly affected by water depths, while phosphorus doses had no influence.
Crescimento e consumo hídrico de pinh?o manso sob estresse salino e doses de fósforo
Sousa, Antonio Evami Cavalcante;Gheyi, Hans Raj;Correia, Karina Guedes;Soares, Frederico Antonio Loureiro;Nobre, Reginaldo Gomes;
Revista Ciência Agron?mica , 2011, DOI: 10.1590/S1806-66902011000200008
Abstract: soil salinity reduces the absorption of water by plants, consequently their growth and production. aiming to evaluate the growth of the physic nut as a function of irrigation with saline water during the third year of growth, an experiment was conducted in a protected environment, adopting a randomized block with a 5 x 2 factorial design consisting of five levels of electrical conductivity of the water used for irrigation - ecw (0.6; 1.2; 1.8; 2.4 and 3.0 ds m-1) and two levels of p2o5 per year (135 and 200 g per plant) and four replications. plants were cultivated in pots of 200 l and irrigated at intervals of three days. the increase of ecw, starting from the 30th day after pruning (dap), caused significant reduction in the variables: stem diameter, leaf number and leaf area. the leaf area and number were most affected and therefore are the best indicators to express the effects of water salinity on the physic nut. the salinity of the irrigation water interferes negatively in dry-matter accumulation in the leaves, and the mean water consumption of the physic nut is reduced by about 60% when irrigated with water with the highest ecw in relation to the lowest. leaf area was the only growth variable influenced by phosphorus levels in the three evaluations, where leaf number was influenced at 30 dap. this physic nut crop demonstrates sensitivity at water salinity levels above 1.6 ds m-1.
Growth and Production of Hydroponic Pepper under Salt Stress and Plant Density  [PDF]
Guilherme De Freitas Furtado, Antonio Ramos Cavalcante, Lúcia Helena G. Chaves, José Amilton Santos Júnior, Hans Raj Gheyi
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.89151
Abstract: The viability of the use of brackish water in the hydroponic cultivation of vegetables cannot dispense with auxiliary techniques such as water mixing and the use of plant densities. In this sense, the objective of the present work was to analyze the growth and production of sweet pepper, cv. All Big, under hydroponic conditions, under different levels of electrical conductivity of the nutrient solution (1.7, 3.7, 5.7, 7.7, 9.7 and 11.7 dS·m-1) in plants spaced every 0.2 m and 0.3 m. These treatments were distributed in a completely randomized experimental design, analyzed in a 6 × 2 factorial scheme, with five replications. The growth variables were evaluated at 60, 75 and 90 days after sowing and the production variables at the time of harvest; however, the results were submitted to analysis of variance, at a 0.05 probability level. The interaction between the electrical conductivity of the nutrient solution and the density of plants influenced the behavior of the growth and production variables of pepper (All Big). It was verified that the pepper plants had better performance of the biometric variables plant height, stem diameter and number of leaves when cultivated every 30 cm. At the time, in the analysis by plant, the production of pepper fruits was more expressive when spacing of 30 cm was adopted, however, in the tube of six meters, when 20 cm of spacing was used, the number of fruits was on average, 26.38% and 16.40% higher than lower density, in the electrical conductivities 1.7 and 11.7 dS·m-1.
Auditoria de Desempenho de Sistemas de Irrigac o I: A Experiência Inicial do Servi o De Assessoramento ao Irrigante – Sai, no Distrito de Irriga o do Baixo Acaraú, CE
Jeniffer Vasconcelos de Lira,Francisco Mour?o Junior,Antonio Evami Cavalcante Sousa,Silvio Carlos Ribeiro Vieira Lima
Revista Brasileira de Agricultura Irrigada , 2011, DOI: 10.7127/rbai.v5n400048
Abstract: A fruticultura tem-se tornado uma atividade inovadora,principalmente pela utiliza o de m o-de-obra e tratos culturais especializados. Isso tem provocado a substitui o de culturas tradicionais de baixa rentabilidade por culturas cuja produ o destina-se, principalmente, ao mercado externo, otimizadas pelo usode tecnologias de irriga oe aumento da produtividade. Essa situa o temsido observadanos agropólos em implementa o e/ou implementados no Estado do Ceará.O Distrito de Irriga odo Baixo Acaraú (DIBAU) abrange os municípios de Acaraú, Bela Cruz e Marcogerando diretamente mais de três mil empregos na regi o. O seguinte trabalho tem como objetivo, descrever a situa o atual do DIBAU, mostrando seu potencial e importancia para o Estado do Cearáe como estáa irriga o neste Distrito. Foram entrevistados todos os produtores em atividade, sendo aplicado um questionário a cada um deles. Foram identificados os dados pessoais doprodutor, da propriedade, do sistema de irriga o e das culturas implantadas. Dos 556 lotes cadastrados 60,6% est o ativos, 20,4% est o sem atividade (mata virgem ou sem atividade) e 19% n o quiseram participar da pesquisa. De3842hairrigados, somente 65% s o irrigados atualmente. As principais culturas cadastradas s o coco, banana, goiaba e mam o com 40,12; 23,86; 9,20 e 6,25% respectivamente. O sistema de irriga o predominante é microaspers o com 82% de toda a área irrigada e somente 4,79% da área irrigada disp e de método de manejo de irriga o.
Phosphorus adsorption characteristics in paraiba state argisols, plinthite soils and cambisols, Brazil
Lucia Helena Garófalo Chaves,Iêde de Brito Chaves,Ana Kelliane Silva de Nascimento,Antonio Evami Cavalcante Sousa
Engenharia Ambiental : Pesquisa e Tecnologia , 2009,
Abstract: The objective of this paper was to determine the phosphorus (P) adsorption characteristics using the Langmuir isotherm and its relation with some chemical and physical properties of soils. The study was carried out in laboratory of Universidade Federal de Campina Grande, Paraiba State (PB), Brazil, with Argisols (PVAd; PVAe; PVd), two Plinthite soil (FTd-1 e FTd-2) and three Cambisols (CXbd-1; CXbd-2; CXbe) surface (0-20 cm) samples from Paraíba State. In these soils, remaining phosphorus was determined with a solution containing 60 mg L-1 of P. The phosphorus doses used were defined based on the remaining P values and corresponded to 10; 30; 50; 100 e 150 mg L-1 of P. To available the maximum P adsorption capacity (MPAC), the data of adsorbed P and the concentrations of equilibrium solutions were adjusted to Langmuir isotherm. Langmuir model offered a good fit for the experimental data. The highest MPAC value was observed in PVd soil. The CMAP and adsorption energy were negatively correlated with base saturation. The attributes closest correlated with soil of the same class MPAC were soil clay and organic matter content and pH value. Available P influenced the adsorption of the element in PVAe.Key-words: Langmuir, adsorption isotherm.
Esterco bovino líquido em luvissolo sódico: Resposta biométrica e produtiva do maracujazeiro amarelo Liquid bovine manure in luvissol sodic: Biometric and productive response of yellow passion fruit plants
Vinícius Batista Campos,Lourival Ferreira Cavalcante,Stella Silva Prazeres Campos,Hans Raj Gheyi
IDESIA , 2011,
Abstract: RESUMO Objetivou-se com o presente estudo, avaliar o efeito do biofertilizante bovino líquido na biometria e produ o de matéria seca das mudas de maracujazeiro amarelo cultivado em Luvissolo sódico. O experimento foi desenvolvido no departamento de Solos e Engenharia Rural do CCA, UFPB, no período entre agosto e outubro de 2008, distribuído em blocos casualizados em parcelas subdivididas, estando nas parcelas níveis de biofertilizante bovino líquido de 0, 25, 50, 75 e 100% em volume correspondente a 10% (250 mL) do volume do substrato e nas subparcelas cinco períodos de avalia es das plantas (45, 60, 75, 90 e 105 dias após a semeadura) em quadruplicata. A aplica o do biofertilizante foi feita 30 dias antes da semeadura, a seguir aplicou-se uma lavagem do solo (dois dias após do fornecimento) e, uma segunda aplica o do biofertilizante, 48 horas antes da semeadura, seguida de uma lavagem semelhantemente à da primeira aplica o. Utilizou-se na irriga o água n o salina, adicionando-se a cada 24 horas, o volume evapotranspirado nesse período, baseado no processo de pesagem do vaso. O aumento do nível do insumo organico proporcionou maior altura das plantas, diametro caulinar, número de folhas, área foliar e matéria seca total, superando a testemunha em 134,78; 114,72; 127,35, 416,54 e 107,97%, respectivamente. ABSTRACT The objective of the present study was to evaluate the effect of liquid bovine biofertilizer on the biometry and the dry matter production of yellow passion fruit seedlings grown on sodic Luvissol. The experiment was performed in the Department of Soil and Rural Agricultural Engineering of the Center of Agricultural Sciences (CCA), Federal University of Paraíba (UFPB), from August to October 2008. The experimental design was that of randomized blocks in split plots, where the plots were the levels of liquid biofertilizer at 0, 25, 50, 75 and 100% by volume of 10% of the total substratum volume (250 mL), the subplots were the five plant evaluation periods (45, 60, 75, 90 and 105 days after the sowing); the experiment was performed in quadruplicate. The application of biofertilizer was made 30 days before sowing, followed by a washing of the soil (two days after of biofertilizer application); a second application of the biofertilizer was made 48 hours before sowing, followed by a soil washing similar to that of the first application. Non-saline water was used for irrigation, adding the water equivalent to the evapotranspiration rate per 24 hours, based on weighing the pots. The increased level of organic matter input provided greater plant
Estéreo bovino líquido em luvissolo sódico: II. Emergência e análise de crescimento do maracujazeiro amarelo1 Liquid bovine manure in luvissol sodic: II. Emergence and growth analysisof the yellow passion plants
Vinícius Batista Campos,Lourival Ferreira Cavalcante,Stella da Silva Prazeres-Campos,Hans Raj Gheyi
IDESIA , 2011,
Abstract: Um experimento foi desenvolvido em casa de vegeta o em blocos em parcelas subdivididas com objetivo de avaliar a emergência e análise de crescimento do maracujazeiro amarelo num solo sódico submetido à aplica o de biofertilizante bovino líquido aplicado ao solo aos níveis percentuais de 0, 25, 50, 15 e 100% em volume correspondente a 10% (250 mL) do volume do substrato para avalia o das plantas aos 45, 60, 15, 90 e 105 dias após a semeadura. O fornecimento do biofertilizante foi realizado em duas etapas: a primeira aos 30 dias antes da semeadura mais lavagem dois dias após a aplica o e a segunda 48 horas antes da semeadura procedendo a lavagem semelhante a primeira aplica o. As plantas foram irrigadas com água n o salina (CE= 0,21 dS m-1) fornecendo o volume de água evapotranspirado de cada 24 horas com base no processo de pesagem. O desbaste das plántulas foi realizado aos 28 dias após a semeadura deixando-se apenas uma planta por unidade experimental. O percentual de emergência do maracujazeiro amarelo foi superior nos tratamentos com maior percentagem de biofertilizante adicionado, além do insumo proporcionar maior taxa de crescimento absoluto das plantas. An experiment was carried out in green house in order to evaluate at initial growth of yellow passion plants submitted to application of liquid bovine biofertilizer applied to soil in liquid form to levels equivalent to 0, 25, 50, 15 and 100% in volume corresponding to 10% (250 mL) of volume of the substrate and plant evaluation at five ages 45, 60, 15, 90 and 105 days after sowing. The supply of biofertilizer was applied in two epochs. The first 30 days the before the sowing followed by soil washing two days after application of biofertilizer and the second 48 hours before sowing and soil washing. The plants were irrigated with non saline water (EC = 0.21 dS m-1) adding water volume equivalent to evapotranspirat during 24 hours. The emergence of yellow passion fruit plants was superior in treatments with higher levels of biofertilizer applied to soil, over there of organic product provide more absolute growth rate of plants.
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