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Search Results: 1 - 10 of 18648 matches for " Anarlete U;Dornelas "
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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.
Profundidades de semeadura para emergência de plantulas de juazeiro
Alves, Edna Ursulino;Bruno, Riselane de Lucena Alcantara;Alves, Anarlete Ursulino;Alves, Adriana Ursulino;Cardoso, Edson de Almeida;Dornelas, Carina Seixas Maia;Galindo, Evio Alves;Braga Júnior, Joel Martins;
Ciência Rural , 2008, DOI: 10.1590/S0103-84782008000400042
Abstract: zizyphus joazeiro mart. is a typical brazilian tree of the northeastern dry lands, being endemic to the caatinga. it occurs in various states of northeast brazil and provides a great economic potential and importance for this semi-arid region. this study had as objective to determine the best sowing depth of zizyphus joazeiro. in greenhouse sand substratum, with 4 replications of 25 units of dispersion each one, in the following depths (one, too, tree, four and five centimeters). it was ended that the sowing of juazeiro in nursery should be done in the depth of 1.0 to 1.6cm. the depth of 1 cm resulted in smaller time for the total germination.
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.
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.
From leaf to flower: revisiting Goethe's concepts on the ¨metamorphosis¨ of plants
Dornelas, Marcelo Carnier;Dornelas, Odair;
Brazilian Journal of Plant Physiology , 2005, DOI: 10.1590/S1677-04202005000400001
Abstract: goethe?s seminal scientific work, versuch die metamorphose der pflanzen zu erklaren (an attempt to interpret the metamorphosis of plants) dated from 1790, has created the foundations for many domains of modern plant biology. the archetypal leaf concept, which considers floral organs as modified leaves, besides being the best known has been proven true, following the description of the abc molecular model of floral organ identity determination during the last decade. here we analyze the whole theoretical frame of goethe?s 1790 publication and present two previously misconsidered aspects of this work: the "refinement of the sap" concept as a directional principle and the "cycles of contractions and expansions" as cycles of differential determination of the shoot apical meristem. the reinterpretation of these concepts are in line with the modern view that molecular networks integrate both environmental and endogenous cues and regulate plant development. this reassessment also helps to elaborate a theoretical frame that considers the evolutionary conservation of the molecular mechanisms that regulate plant development.
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.
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.
Desempenho de genótipos de coentro em Areia
Oliveira, Ademar P de;Melo, Paulo César T. de;Wanderley Júnior, Luiz Jorge da G;Alves, Anarlete U;Moura, Macio F de;Oliveira, Arnaldo Nonato P de;
Horticultura Brasileira , 2007, DOI: 10.1590/S0102-05362007000200024
Abstract: seven coriander genotypes were evaluated (lines htv 9299, htv 7299, htv 0699, htv 0999,htv 0199 and cvs. verd?o and palmeira), in areia county, paraiba state, brazil, from may to july of 2003 in randomized blocks in four replications. verd?o (5,0 kg m-2) and palmeira (4,3 kg m-2) cultivars and the lines htv 9299 (4,4 kg m-2), htv 7299 (4,5 kg m-2) and htv 0999 (4,3 kg m-2), exhibited the greatest yield of green mass (gm), while the line htv 0199, with 2.9 kg m-2 of gm, showed the lowest yield. lines htv 7299 (0.73) and htv 0199 (0.81) presented the largest values for the ratio leaves:stalks. verd?o and palmeira cultivars and lines htv 7299, htv 0999, htv 0699 and 9299 persented 65; 58; 35; 29; 40 and 59%, respectively, of plant bolting (pb) at 42 days after sowing date, while line htv 0199 presented only 11%. line htv 7299 might be an alternative for coriander cropping in areia.
Signal transduction, cell division, differentiation and development: towards unifying mechanisms for pattern formation in plants
Dornelas, Marcelo Carnier;
Brazilian Journal of Plant Physiology , 2003, DOI: 10.1590/S1677-04202003000100001
Abstract: the elaboration of plant form and function depends on the ability of a plant cell to divide and differentiate. the decisions of individual cells to enter the cell cycle, maintain proliferation competence, become quiescent, expand, differentiate, or die depend on cell-to-cell communication and on the perception of various signals. these signals can include hormones, nutrients, light, temperature, and internal positional and developmental cues. in recent years, progress has been made in understanding the molecular control of plant pattern formation, especially in the model plant arabidopsis thaliana. furthermore, specific genes have been found that are necessary for normal pattern formation and the control of the rates of cell division and differentiation. cloning of these genes is revealing the molecular basis of plant pattern formation and the key players on plant signal transduction systems.
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