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Search Results: 1 - 10 of 208296 matches for " Arnaldo Nonato P;Leonardo "
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Rendimento de maxixe adubado com doses de nitrogênio
Oliveira, Ademar P de;Oliveira, Arnaldo Nonato P de;Alves, Anarlete U;Alves, Edna U;Silva, Damiana F da;Santos, Rodolfo R;Leonardo, Francisco de Assis P;
Horticultura Brasileira , 2008, DOI: 10.1590/S0102-05362008000400022
Abstract: the effect of increasing nitrogen doses was evaluated on the gherkin yield, cv. nordestino. this study was carried out on the period from may to september 2006, at the universidade federal da paraíba, in areia, paraiba state, brazil, in an experimental design of randomized blocks with six treatments (0; 50; 100; 150, 200 and 250 kg ha-1 n) and four replications. twenty plants per plot were used, on a spacing of 2 x 1 m. fruit average mass, number and fruits production per plant, and yield of fruits were evaluated. fruits average mass reached the maximum value of 21 g using the dose of 155 kg ha-1 of n. the maximum number (21 fruits) and the maximum fruits production per plant of gherkins (469 g) were reached with 153 and 187 kg ha-1 of n, respectively. the dose of 188 kg ha-1 of n was responsible for the maximum yield of 12.7 t ha-1 of fruits. for the highest maximum economic efficiency the dose of 183 kg ha-1 of n was responsible for the yield of 12.7 t ha-1 of commercial fruits, meaning a development of 9.4 t ha-1 in the fruits productivity, relative to n absence.
Yield of gherkin in response to doses of bovine manure
Oliveira, Arnaldo Nonato P de;Oliveira, Ademar P de;Leonardo, Francisco de Assis P;Cruz, Iordam da S;Silva, Damiana F da;
Horticultura Brasileira , 2009, DOI: 10.1590/S0102-05362009000100020
Abstract: considering the importance of gherkin in northeastern brazil, studies focusing on increasing its quality and yield are powerful tools to improve people social and economical condition in this region. the effects of doses of bovine manure were evaluated in gherkin yield in an experiment using cultivar nordestino, from may to september 2006, at the federal university of paraíba, in areia county, paraíba state, brazil. the experimental design was randomized complete blocks, with five treatments (0; 10; 20; 30, and 40 t ha-1) of bovine manure, in four replications. the working area in each experimental plot corresponded to 80 m2, including 20 plants, with 2.0 x 2.0 m spaces. the highest number of fruits per plant (30) was achieved with 32.2 t ha-1 of bovine manure. both fruit production per plant and fruit yield increased with doses of bovine manure, with maximum values of respectively 1,306 g and 19.5 t ha-1, when 40 t ha-1 of bovine manure were used.
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.
Yield and phenology of yam as affected by the physiological rest period of seed-rhizomes
Oliveira, Ademar P de;Moura, Márcio F de;Alves, Edna U;Alves, Anarlete U;Oliveira, Arnaldo Nonato P de;Leonardo, Francisco de Assis P;Cruz, Iordam da S;
Horticultura Brasileira , 2008, DOI: 10.1590/S0102-05362008000200005
Abstract: the objective of this work was to evaluate the effects of the rest period of seed-rhizomes in the phenology and yield of yam da costa (dioscorea cayennensis). the experiment was carried out in field conditions at the federal university of paraíba, in areia, brazil, from january to december 2004, in an ustpsamment soil. a completely randomized block design was used to test three treatments, 60-, 80-, and 100-day seed-rhizome rest periods, with seven replications. plant emergency was evaluated every ten days from 40 to 90 days after planting (dap), as well as plant height, evaluated up to 80 dap. the average mass of commercial rhizomes and the yield of commercial and seed-rhizomes were also assessed. at 40, 50, and 60 days after planting, plant emergency was superior for seed-rhizomes submitted to 100-day rest periods. at 70 and 80 dap, there were no significant differences. at 90 dap, seed-rhizomes that rested for 60 and 100 days provided around 91 and 83% of plant emergency, respectively. concerning plant height, seed-rhizomes that rested 100 days produced the tallest plants. the average mass of commercial rhizomes and the yield of commercial and seed-rhizomes were 1.22 kg, 13.1 t ha-1, and 7.7 t ha-1, respectively, for seed rhizomes submitted to 60-day rest periods. for 100-day rest period rhizomes, the average mass of commercial rhizomes and the yield of commercial and seed-rhizomes, were 0.73 kg, 7.7 t ha-1, and 1.7 t ha-1, respectively.
Rendimento de maxixe em fun??o de doses P2O5 em solo arenoso
Oliveira, Ademar Pereira de;Oliveira, Arnaldo Nonato Pereira de;Alves, Edna Ursulino;Alves, Anarlete Ursulino;Leonardo, Francisco de Assis Pereira;Santos, Rodolfo Ravaneda;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000400025
Abstract: the aim of this work was to evaluate the gherkin yield in function of levels of p2o5, in quartz psamment. the research was carried out at universidade federal of paraíba, in areia, brazil, from may to september/2006. the experimental design was the one randomized blocks, with five treatments (0, 60, 120, 180, 240 and 300 kg ha-1 of p2o5), and four replications. plots contained 32 plants, spaced 2.00 x 1.00 m. the maximum number of fruits per plant (27) was obtained with the maximum level of 300 kg ha-1 of p2o5. the estimated maximum yield of fruits (14521 kg ha-1), was related with 192 kg ha-1 of p2o5. the of p2o5 level that provided larger economical income was 185 kg ha-1 yielding 14490 kg ha-1 of fruits, with an increase of fruits in the order of 11575 kg ha-1. the most economical level represented 96% of the one responsible for the maximum yield. the text of p mehlich in the soil that had correlated with the maximum yield was 145 mg dm-3 and with the economical maximum was 142 mg dm-3 of p.
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.
Lima beans production and economic revenue as function of organic and mineral fertilization
Alves, Adriana U;Oliveira, Ademar P de;Alves, Anarlete U;Dornelas, Carina SM;Alves, Edna U;Cardoso, Edson A;Oliveira, Arnaldo Nonato P de;Cruz, Iordan da S;
Horticultura Brasileira , 2008, DOI: 10.1590/S0102-05362008000200024
Abstract: lima beans (phaseolus lunatus l.) are alternative food and income sources for the population of northeastern brazil. in this region, lima beans are consumed either as green or dry grains. however, low yields have been observed, a challenge that could be overcome by adequate organic and mineral fertilization. this work intended to assess lima beans yield, cultivar raio de sol, as affected by doses of cattle manure in the presence and absence of mineral npk fertilization. the experiment was carried out at the federal university of paraíba, brazil, from september, 2004 to may, 2005. the experimental design was of randomized blocks, with four replications, 40-plant plots, spaces of 1.00 x 0.50 between and within rows, respectively. treatments were displayed in a 6 x 2 factorial, corresponding to manure doses (0, 10, 20, 30, 40 and 50 t ha-1) and presence and absence of npk. green and dry grain, and pod yields were analysed, as well as the economic revenue for pods and dry grains. to measure the economic efficiency, pods and dry grains were employed as the exchange units. maximum pod yields (12.6 and 11.2 t ha-1) were achieved with 21.4 and 23 t ha-1 of manure, with and without npk, respectively. highest green grain yields (11.1 and 9.9 t ha-1) were obtained with 21.3 and 22.9 t ha-1 of manure, with and without npk, respectively. the highest yield of dry grains (3.5 t ha-1) was obtained with 26.6 t ha-1 of manure combined with npk. in the absence of npk, the use of cattle manure resulted in an average dry grain yield of 2.0 t ha-1. the maximum economic efficiency for pod production was reached with 17 and 18.6 t ha-1 of manure, with predicted net incomes of 2.88 and 3.36 t ha-1 of pods, in the presence and absence of npk, respectively. for dry grains, the maximum economic efficiency was achieved with 23 t ha-1 of manure, in the presence of npk, which produced a net revenue of 2.12 t ha-1 of dry grains.
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.
Yield of sweet potato fertilized with cattle manure and biofertilizer
Oliveira, Ademar P;Santos, Jo?o F;Cavalcante, Lourival F;Pereira, Walter E;Santos, Maria do Carmo CA;Oliveira, Arnaldo Nonato P;Silva, Natália V;
Horticultura Brasileira , 2010, DOI: 10.1590/S0102-05362010000300006
Abstract: in northeastern brazil, the sweet potato is cultivated in small farms, in a family farming systems, constituting themselves an alternative way for the generation of food, employment and income. this study aimed to assess the effect of cattle manure levels and biofertilizer concentrations on the sweet potato cultivar white queen productivity. the experiment was carried out from march to september 2007 at the emepa experimental station in lagoa seca, brazil. the experimental design was randomized blocks, in split split plot 6 x 4 x 2 + 1 scheme, with four replications. the plots consisted of cattle manure levels (0, 10, 20, 30, 40 and 50 t ha-1), the subplot of biofertilizer concentrations (0, 15, 30 and 45%) and the sub subplots consisted of methods of biofertilizer application, to the soil or leaves. also, there was an additional control treatment using n, p and k mineral fertilizer. commercial and total root productivity was evaluated. the levels of 30.8 and 31.2 t ha-1 of cattle manure were responsible for the highest commercial and total sweet potato root productivity (17.4 and 13.1 t ha-1, respectively). biofertilizer concentrations of 29 and 28%, applied to soil and to leaves provided, respectively, the greatest productivities of total roots (15.4 and 13.1 t ha-1), whereas concentrations of 30 and 27%, also applied to soil and leaves were responsible, respectively, for the highest commercial root productivity (11 and 9.7 t ha-1).
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.
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