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Search Results: 1 - 10 of 627673 matches for " Jandiê A. da;P?rto "
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Produ??o de feij?o-fava em fun??o do uso de doses de fósforo
Oliveira, Ademar P. de;Alves, Edna U.;Alves, Adriana U.;Dornelas, Carina S.M.;Silva, Jandiê A. da;Prto, M?nica L.;ALves, Amarlete V.;
Horticultura Brasileira , 2004, DOI: 10.1590/S0102-05362004000300008
Abstract: phosphorus is an important mineral nutrient for vegetables. this work was conducted at universidade federal da paraíba, in areia, brazil, from december/2001 to july/2002, aiming to evaluate the effect of levels of p2o5 on the yield of lima bean, cv. "orelha de vó". the experimental design was a randomized block with five treatments (0; 100; 200; 300; 400 and 500 kg ha-1 of p2 o5), and four replications. each plot consisted of 40 plants spaced 1.0 m between rows and 0.50 m between plants in each row. the estimated maximum yield of green and dry beans (5.2 and 2.7 t ha-1, respectively) corresponded, to the dosages of 309 and 302 kg ha-1 of p2o5. the levels 291 kg ha-1 and 281 kg ha-1 of p2o5 provided, respectively, the greater economic return for the yield of green (4.1 t ha-1) and dry (1.8 t ha-1) beans. the most economic levels included more than 80% of those dosages responsible for the maximum yields and indicated the economic viability of phosphorus utilization on lima bean crop. the p2o5 levels which promoted the maximum yield and the maximum economic return for green and dry beans yield were respectively, with 57.1; 56.3; 55.0 and 53.8 mg dm-3 of available p for the extractor of melich 1. the lima bean response to the phosphorus fertilization in soils with similar fertility used in the present study, for green and dry beans yield, will be reduced at levels of available p superior to 55.0 and 53.8 mg dm-3. the average concentration of p in the leaves of lima bean, 120 days after sowing, in function of levels of p2o5 was of 3.4 g kg-1. for the soil of this study the application of 291 and 281 kg ha-1 of p2o5 is more recommended to establish the lima bean respectively, for green and dry beans yield.
O delírio à luz da teoria dos atos de fala
Martins, Francisco;Costa, Arilson Corrêa da;Prto, Karime da Fonseca;
Psicologia: Reflex?o e Crítica , 2000, DOI: 10.1590/S0102-79722000000100018
Abstract: this paper presents a possible solution to the problems aroused by the understanding of the delusional phenomenon according to the model of a restricted theory of absolute reference in which the words and, consequently, the judgements, correspond to the things as a logical alphabet. in the pragmatic conception adopted here, language is taken as a game guided by rules in which effective discursive cooperation is more important than the ideal meaning of expressions. in this sense, the theory of acts of speech seems to be the best solution offered by the philosophical pragmatics and it is used as a methodological principle on the analysis of speech excerpts of delusional patients. delusion shows itself as an original solution to decisive questions in the history of a psychotic person.
O delírio à luz da teoria dos atos de fala
Martins Francisco,Costa Arilson Corrêa da,Prto Karime da Fonseca
Psicologia: Reflex?o e Crítica , 2000,
Abstract: Este trabalho apresenta uma possível solu o para problemas suscitados pelo entendimento do fen meno delirante segundo o modelo de uma teoria restrita da referência absoluta, na qual as palavras e, consequentemente, os juízos, corresponderiam às coisas como um alfabeto lógico. Na concep o pragmática aqui adotada, a linguagem é tomada por um jogo regido por regras em que é mais importante a eficácia da coopera o discursiva que o significado ideal das express es. A teoria dos atos de fala se mostra a mais bem acabada solu o da pragmática filosófica nesse sentido e é usada como princípio metodológico na análise dos excertos de fala de pacientes delirantes que constituem os corpus discursivos. O delírio termina por se mostrar como uma solu o inédita para quest es cruciais da história do indivíduo psicótico.
Produ??o do maxixeiro em fun??o de espa?amentos entre fileiras e entre plantas
Oliveira, Ademar P de;Silva, Jandiê A da;Oliveira, Arnaldo Nonato P de;Silva, Damiana F da;Santos, Rodolfo R;Silva, Natália V da;
Horticultura Brasileira , 2010, DOI: 10.1590/S0102-05362010000300017
Abstract: the yield of the gherkin cv. nordestino was evaluated with different spacings between rows and plants in a row in an essay which was carried out at the universidade federal da paraíba, brazil, from august/2007 to january/2008. the randomized block experimental design was used and the treatments were arranged in the factorial scheme 3 x 4 - three spacings between rows (1.0; 2.0; and 3.0 m) and four spacings between plants (0.5; 1.00; 1.5; and 2.0 m) - with four replicates. the experimental plot comprised four rows with ten plants in each one, totaling 40 plants, with one plant per hole. two central rows were considered as the useful area. the evaluated variables were the average mass of commercial fruits, the number and production of the commercial fruits plant-1 and the commercial productivity of fruits. setting 0.5 m between plants, all the characteristics under evaluation decreased as consequence of increasing spacings between rows. the highest values for average fruit mass (38 g), number of fruits (67 and 78) and productivity of fruits plant-1 (36 and 34 kg) were obtained at spacings of 2.0 and 3.0 m between rows and 1.0 m between plants, respectively. the highest productivities of commercial fruits (16 and 12.9 t ha-1) were obtained with 1.0 and 1.5 m between plants and 2.0 and 1.0 m between rows. on the other hand, the highest spacing between plants (2.0 m) reduced fruit productivity.
Rendimento do inhame adubado com esterco bovino e biofertilizante no solo e na folha
Silva, Jandiê A. da;Oliveira, Ademar P. de;Alves, Gibran da S.;Cavalcante, Lourival F.;Oliveira, Arnaldo N.P. de;Araújo, Maria A. M.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2012, DOI: 10.1590/S1415-43662012000300003
Abstract: the objective of this study was to evaluate the yam yield, cultivar da costa, fertilized with bovine manure doses and biofertilizer. the experimental design was randomized blocks, in subdivided plots 6 x 2 + 1 with three repetitions. in plots six doses of cattle manure (0; 6; 12; 18; 24 and 30 t ha-1) were tested, factorially combined with the presence and absence of biofertilizer and in subplots, two forms of application of biofertilizer in the soil and by spray on the leaf and an additional treatment with conventional fertilization (animal manure and npk). the doses of 30 t ha-1 of bovine manure and the biofertilizer which was applied in the soil and leaf produced tubers with ideal average weight for the commercialization. the bovine manure in doses of 19.2 t ha-1 and in the absence of biofertilizer provided maximum productivity of 20.3 t ha-1 of commercial tubers. subplots in which the biofertilizer was applied to the soil and leaf, the dose of 30 t ha-1 of cattle manure was responsible, respectively, for maximum yields of 22.8 and 24 t ha-1 of commercial tubers. the organic and conventional fertilizations did not cause any significant change in the mean tuber weight, but the conventional fertilization increased the productivity of commercial tuber.
Parcelamento e fontes de nitrogênio para produ??o de maxixe
Oliveira, Ademar P de;Oliveira, Flávio José V de;Silva, Jandiê A da;Oliveira, Arnaldo Nonato P de;Santos, Rodolfo R;Silva, Damiana F da;
Horticultura Brasileira , 2010, DOI: 10.1590/S0102-05362010000200014
Abstract: the nitrogen sources and parceling were evaluated concerning to gherkin plant, nordestino cv., in the universidade federal da paraíba, brazil. the experimental design was the randomized block design in the factorial scheme 2 x 7, constituted of two nitrogen sources (urea and ammonium sulfate) and seven application times: a) (100% at sowing date; b) 100% 30 days after sowing (das); c) 100% 60 das; d) 50% at sowing date and 50% at 30 das; e) 50% at sowing date and 50% at 60 das; f) 50% at 30 and 50% at 60 dap; g) 33% at sowing date, 33% at 30 33% at 60 dap, with four replicates. the average weight of the fruits was inferior, 27 and 21 g, respectively, when the ammonium sulfate was 100% supplied at sowing and 100% at 60 das, as no alteration occurring in the urea source nor between those n sources. the yield of fruits of one plant (2.364 kg plant-1), the number of fruits of one plant (64 fruits plant-1) and fruit productivity (20.93 t ha-1) were significantly higher, when the nitrogen (ammonium sulfate source) was 50% parceled at 30 and 50% at 60 das. when urea was the nitrogen source, the yield of fruits of one plant (1.437 kg plant-1), the number of fruits of one plant (48 fruits plant-1) and the fruit productivity (12.66 t ha-1) were significantly higher, when it was parceled 50% at sowing date and 50% at 30 dae.
Aduba??o fosfatada em inhame em duas épocas de colheita
Oliveira, Arnaldo Nonato P de;Oliveira, Francisco A;Sousa, Leossávio C de;Oliveira, Ademar P de;Silva, Jandiê A da;Silva, Damiana F da;Silva, Natália V da;Santos, Rodolfo R;
Horticultura Brasileira , 2011, DOI: 10.1590/S0102-05362011000400002
Abstract: the low content of phosphorus in tropical soils makes essential the research about fertilization in crops which are poorly studied such as yam. thus, this study aimed to evaluate the yam productivity (cultivar da costa) depending on phosphorus doses and harvest seasons. from february to december 2009, an experiment was carried out using the randomized blocks experimental design in subdivided plots, with four replications. in the plots six doses of phosphorus were evaluated (0, 100, 200, 300, 400 and 500 kg ha-1 of p2o5), and in the subplots two harvest seasons (seven and nine months after planting). the highest weight of tubers in seven and nine months was 1.94 and 2.20 kg with 245 and 240 kg ha-1 of p2o5, respectively. there was no significant effect of phosphorus doses on the total productivity in seven months and the average value was 13 t ha-1. the highest marketable productivity was 11.8 t ha-1 with 266 kg ha-1 of p2o5. in nine months, the highest total and marketable yield (24.7 and 20.5 t ha-1, respectively) was achieved with the application of 285 and 226 kg ha-1 of p2o5, respectively. the yield of tubers classified as first was 80 and 90% in seven and nine months, respectively, and was obtained with the application of 320 and 277 kg ha-1 of p2o5, respectively. the economic doses were 219 and 233 kg ha-1 of p2o5 to obtain 20.19 t ha-1 and 12.88 t ha-1 of marketable tubers in seven and nine months, representing increments of 19.17 and 3.9 t ha-1 in comparison to no application of phosphorus, respectively.
Tecnologia alternativa para produ??o de túberas-semente de inhame e seus reflexos na produtividade
Oliveira, Ademar P de;Silva, Damiana F da;Silva, Jandiê A da;Oliveira, Arnaldo Nonato P de;Santos, Rodolfo R;Silva, Natália V da;Oliveira, Francisca Joseanny M e;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000300033
Abstract: this study was carried out in two steps at ufpb, in areia, paraiba state, brazil, to evaluate the yam seed production by a high density planting system of tuber-seed portions and its effect on tuber yield. the experimental design in the two steps was randomized blocks with eight treatments and four replications. in the first step were produced yam tuber-seeds through planting of tuber-seed. initially, we produced tuber-seed portions by planting pieces of 25, 50, 75, 100, 125, 150, 175 and 200 g, spaced 20 x 20 cm. the seeds produced in the previous step, had average weight of 108, 133, 157, 181, 205, 229, 253 and 277 g, which were planted to evaluate the yam yield. we evaluated the average mass and the production of seed tubers and the total and commercial yield. the production and average weight of tuber-seeds increased linearly with increasing weight of the pieces of tuber-seeds planted, with maximum values of 277 and 4,170 g, respectively, obtained with a piece of 200 g of tuber-seeds. the total average yield was 13.6 t ha-1 depending on the weight of the planted seed-roots. the marketable yield of tubers was 10.8 t ha-1 obtained with tuber-seeds with an average weight of 181 g, which represents a savings of 34% in the amount of tuber-seeds necessary for the implementation of a hectare of yam.
Doses de nitrogênio no acúmulo de nitrato e na produ??o da alface em hidroponia
Prto, M?nica LA;Alves, Jailson do C;Souza, Adailson P de;Araújo, Raunira da C;Arruda, Jandeilson A de;Tompson Júnior, Ubaldo A;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000300030
Abstract: lettuce production in hydroponic system presents growing expansion in brazil, but still there are problems of quality and risk of nitrate accumulation. this work was carried out to evaluate the lettuce production and nitrate accumulation in hydroponic system depending on the increasing levels of nitrogen in the nutrient solution. the experiment was conducted in greenhouse of the universidade federal da paraíba, brazil. the lettuce plants were grown in nutrient solution containing increasing levels of n (11, 13, 15, 17, 19 and 21 mmol l-1) during a 25-day period. an entirely randomized design with four replications was used. plant total yield (ptt), plant commercial yield (pcm) and nitrate contents in the fresh matter of roots, stems and leaves of the lettuce were evaluated. there were no significant effects of increasing levels of n in nutrient solution on ptt and pcm, average values of 357.3 and 352.5 g/plant being observed, respectively. the increased levels of n in nutrient solution increased linearly nitrate content on all lettuce parts. the nitrate content reached 659, 623 and 615 mg/kg in the fresh matter of roots, stems and leaves, respectively, at the highest n level. nevertheless, the maximum nitrate content observed in leaves was far below the risk level for human health.
Nitrate production and accumulation in lettuce as affected by mineral Nitrogen supply and organic fertilization
Prto, M?nica L;Alves, Jailson do C;Souza, Adailson P de;Araújo, Raunira da C;Arruda, Jandeilson A de;
Horticultura Brasileira , 2008, DOI: 10.1590/S0102-05362008000200019
Abstract: lettuce is one of the leading vegetables in brazil. however, studies concerning its fertilization for the northeastern region of the country are still scarce. this work was carried out to evaluate the effects of mineral nitrogen supply and organic fertilization on the production and nitrate accumulation in lettuce, cultivar elba, in the semi-arid zone of paraíba, brazil. a randomized block design, with four replications, was used to test five doses of cattle manure (30; 60; 90; 120, and 150 t ha-1), five doses of n supplied as urea (30; 60; 90; 120, and 150 kg ha-1), and a control without fertilization. along with mineral n, the other nutrients were also supplied using mineral sources. no additional nutrients were supplied where organic fertilization was used. lettuce yield was significantly higher when organic fertilization was used, compared to the mineral nutrient supply. taking into account most of the fertilization doses recommended for growing lettuce in the brazilian northeastern states, n mineral fertilization in sandy soils with low organic matter contents can be fully replaced by organic fertilization with cattle manure. plant total (pty) and commercial yield (pcy) as affected by the mineral n supply fitted into a quadratic model, in which the doses 94.5 and 95.7 kg ha-1 corresponded to respectively the highest pty (381.9 g plant-1) and pcy (321.6 g plant-1). where organic fertilization was used, pty and pcy fitted into a linear model. therefore, the highest pty (523.9 g plant-1) and pcy (449.48 g plant-1) were observed at the highest manure doses. nitrate content on roots, stems, and leaves increased linearly with nitrogen and manure application. in roots, the nitrate content (mg kg-1 of fresh matter) reached 93.96 (n mineral (nm)) and 65.09 (organic fertilization (of)); in stems, 183.45 (nm) and 98.22 (of); and in leaves, 121.98 (nm) and 75.62 (of). the maximum nitrate content observed in leaves was far below the risk level for human health.
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