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Search Results: 1 - 10 of 526780 matches for " Jandiê A da;Oliveira "
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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.
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.
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.
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;P?rto, 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.
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.
Rendimento de feij?o-vagem em fun??o de doses de K2O
Oliveira, Ademar Pereira de;Silva, Jandiê Araújo;Alves, Adriana Ursulina;Dorneles, Carina Seixas M;Alves, Anarlete Ursulino;Oliveira, Arnaldo Nonato P. de;Cardoso, Edson A.;Cruz, Iordam da Silva;
Horticultura Brasileira , 2007, DOI: 10.1590/S0102-05362007000100007
Abstract: aiming to evaluate the effect of k2o levels on the increase of snap bean yield, an experiment was performed in paraíba state, brazil, in a quartz psamment soil. the experimental design was of randomized blocks, with six treatments (0; 50; 100; 150; 200 and 250 kg ha-1 of k2o), in four replications. each plot contained 40 plants spaced 1.0 m x 0.2 m. pods maximum number/plant (20 pods) and the maximum yield/plant (171 g), were obtained, respectively with 145 and 173 kg ha-1 of k2o, and pods yield reached maximum value around 25,3 t ha-1 at the level of 171 kg ha-1 of k2o. the most economic level of k2o for the production of pods was of 165 kg ha-1. the most economic level represented 96% comparing to that responsible for maximum pods production. the k2o levels that obtained maximum pods production and economic return were correlated, respectively, with 181 and 176 mg dm-3 of k available for the extractor mehlich 1.
Resposta do quiabeiro às doses de fósforo aplicadas em solo arenoso
Oliveira, Ademar P. de;Dornelas, Carina Seixas M.;Alves, Adriana U.;Alves, Anarlete U.;Silva, Jandiê Araújo da;Oliveira, Arnaldo Nonato P. de;
Horticultura Brasileira , 2007, DOI: 10.1590/S0102-05362007000200010
Abstract: the influence of phosphorus fertilization on yield of okra, cv. santa cruz was evaluated. the research was carried out in the experimental design of randomized blocks, with five treatments (0; 44; 88; 132 and 176 kg ha-1 of p), and four replications. the maximum number of fruits per plant (43) was obtained with the maximum level of 176 kg ha-1 of p. the estimated maximum yield of commercial fruits (38.6 t ha-1), was related to 139 kg ha-1 of p. the application of 137 kg ha-1 of p provided the highest economical income, yielding 38.3 t ha-1 of commercial fruits, with an increment of fruits of 17.4 t ha-1. the most economic level represented 98% of that responsible for the maximum yield, indicating that the okra responded economically to the use of p in sandy soil and, of the p level responsible for the maximum commercial yield of fruits were related to 40 mg dm-3 of available p in soil (mehlich 1), and the level responsible for the highest economic income was related to 38 mg dm-3.
Rendimento produtivo e econ?mico do feij?o-caupi em fun??o de doses de potássio
Oliveira, Ademar Pereira de;Silva, Jandiê Araújo da;Lopes, Edson Batista;Silva, Erllens éder;Araújo, Lucia elena Avelino;Ribeiro, Valéria Veras;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000200042
Abstract: cowpea bean [vigna unguiculata (l) walp] is one the main crops in the northeast region of brazil. with the objective of evaluating the effect of potassium fertilization on cowpea bean cv. pitiúba, an experiment was carried out at federal university of paraíba, in areia (pb), brazil, on a quartz psamment soil, from july to september 2005. the experimental design was the randomized blocks, with six treatments (0, 50, 100, 150, 200, and 250 kg ha-1 k2o), and four replications. each plot contained 40 plants spaced 0.80 m x 0.40 m. the maximum yield of pods per plant (285 g), green grains (143 g) and dry grains (120 g) were obtained with 160, 153 and 200 kg ha-1 k2o, respectively. the levels of 210, 151, and 170 kg ha-1 k2o were responsible for the maximum yields of 4.18 t ha-1 of pods, 3.48 t ha-1 of green grains, and 1.89 t ha-1 of dry grains, respectively. the maximum level of economical efficiency for the yield of dry grains was 141 kg ha-1 k2o, with a yield of 1.87 t ha-1.
Produtividade da pimenta-do-reino em fun??o de doses de esterco bovino
Oliveira, Ademar P;Alves, Edna U;Silva, Jandiê A;Alves, Anarlete U;Oliveira, Arnaldo Nonato P;Leonardo, Francisco AP;Moura, Mácio F;Cruz, Iordam S;
Horticultura Brasileira , 2007, DOI: 10.1590/S0102-05362007000300017
Abstract: although paraíba state, has shown aptitude for black pepper cultivation, being possible to recommend it as an alternative for agricultural diversification in that area, no recommendation for black pepper crop fertilization exists. this research was conducted at the universidade federal da paraíba, in areia, paraíba state, brazil, to evaluate black pepper genotypes submitted to increasing levels of cattle manure. the experimental design was of randomized blocks, with treatments in the factorial 5 x 3 scheme. the first factor was represented by cattle manure levels (0; 4; 8; 12; and 16 kg plant-1) and the second factor, by the black pepper genotypes (ia?ará, cingapura and bragantina), with four replications. black pepper production increased with the use of cattle manure in environmental conditions. the highest pepper yield per plant of bragantina (1012 g), ia?ará (1269 g), and cingapura (627 g) were obtained with 7.3; 8.6; and 7.0 kg of cattle manure/plant, respectively. the estimated yields of dry pepper were of 6.5; 8.9; and 7.8 kg plant-1, responding to maximum yields of 358, 793 and 204 g plant-1 for bragantina, ia?ará and cingapure genotypes, respectively.
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