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Search Results: 1 - 10 of 370040 matches for " Ademar P. de;Alves "
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Germina??o e vigor de sementes peletizadas de tomate
Oliveira, Ademar P. de;Bruno, Riselane de L. A.;Alves, Edna U.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2002, DOI: 10.1590/S1415-43662002000200017
Abstract: this study was conducted with the objective of determination of most adequate substrate, temperature and forms of hydration applied in germination and vigor tests of pelleted seeds of tomato. the experiment was carried out at the seed analysis laboratory of the department of agronomy of the federal university of paraíba, brazil. the experimental design adopted was a completely randomized and the treatments were distributed in a 3 x 4 x 2 factorial scheme, the factors studied were temperature (25, 30 oc constant and 20-30 oc alternate), substrates (on and between paper sheets sand and vermiculite) and the hydration for which distilled water and potassium nitrate were used. the effects were evaluated considering percentage of germination, first counting, germination speed and weight of dry matter of seedlings. the substrates sand and vermiculite moistened with distilled water at constant temperatures of 25 or 30 oc were the most efficient for germination and vigor test of pelleted seeds of tomatoes. the alternated temperatures 20-30 oc and substrates on paper and between paper sheets were not found to be adequate for evaluation of pelleted seeds of tomato.
Avalia o de linhagens e cultivares de feij o-caupi, em Areia, PB
Oliveira Ademar P. de,Sobrinho José Tavares,Nascimento Jo?o T.,Alves Adriana U.
Horticultura Brasileira , 2002,
Abstract: Dez linhagens e três cultivares de feij o-caupi foram avaliadas em ensaio conduzido em Areia (PB), de abril a julho de 2000, em Latossolo Vermelho-Amarelo. As linhagens TE-92-199-20F;TE-90-170-29F; TE-90-170-76F; CNCX-405-17F; CNCX-409-12F; TE-90-180-10F; TE 87-108-6G, Linhagem avan ada e as cultivares, IPA 206 e BR-03 Tracuateua, apresentaram comprimento e peso médio de vagens dentro dos padr es comerciais e número médio de vagens por planta dentro do padr o para a espécie (acima de vinte vagens). A produtividade de vagens verdes e de gr os verdes e secos obtida pelas linhagens TE-90-170-76F; CNCX-409-12F; CNCX-405-17F; TE-90-180-10F; TE-87-108-6G, Linhagem avan ada e pela cultivar IPA 206, foram superiores a 5,0 t/ha para vagens verdes, a 3,0 t/ha para gr os verdes e a 1,2 t/ha para gr os secos, consideradas altas para o feij o-caupi. As maiores produtividade de vagens verdes (6,5 e 6,5 t/ha), de gr os verdes (3,8 e 3,8 t/ha), e de gr os secos (1,8 e 1,8 t/ha) foram obtidas, respectivamente, com as linhagem CNCX-409-12F e cultivar IPA 206.
Rendimento de palmito de pupunheira em fun??o da aplica??o de esterco bovino e aduba??o química
Nascimento, Jo?o T.;Oliveira, Ademar P. de;Souza, Adailson P. de;Silva, Ivandro de F. da;Alves, Adriana U.;
Horticultura Brasileira , 2005, DOI: 10.1590/S0102-05362005000100004
Abstract: the combination effect of cattle manure and mineral fertilization on palm heart yield in peach palm plants was evaluated. the experiment was conducted from april 2000 to may 2002 in quartz psamment at the universidade federal da paraíba, in areia, brazil. the experiment design was a randomized block with treatments arranged in a 4 x 2 factorial scheme with four cattle manure rates (0; 10; 20 and 30 t ha-1) in the presence or absence of npk fertilizer in four replications. each plot consisted of 20 plants spaced 2 x 1 m. estimates of maximum yield for first class (0.84 t ha-1) and second class (1.10 t ha-1) palm heart were obtained when using cattle manure at the rates of 15.4 and 14.0 t ha-1 in combination with mineral fertilization. in the absence of mineral fertilization the maximum yield of first class (0.76 t ha-1) and second class (1.0 t ha-1) palm heart was attained with cattle manure rates of 15.8 and 16.0 t ha-1. first class palm heart presented the maximum yield estimated at 1.94 t ha-1 with cattle manure applied at the rate of 15.0 t ha-1. in the absence of n-p-k fertilization the maximum yield of 1.85 t ha-1 was due to the application of 16.6 t ha-1 of cattle manure.
Rendimento de feij?o-caupi em fun??o de doses e formas de aplica??o de nitrogênio
Oliveira, Ademar P. de;Silva, Virna R. F.;Arruda, Francineuma P. de;Nascimento, Irisvaldo S. do;Alves, Adriana U.;
Horticultura Brasileira , 2003, DOI: 10.1590/S0102-05362003000100016
Abstract: the cowpea-bean, known as macassar-bean or rope-bean is one of the main crops in the northeast region of brazil. it is consumed either as fresh or dried beans. cowpea is cultivated in almost all regions of the paraíba state, representing 75% of the cultivated area with cowpea-beans. the low yield is attributed to the lack of a research program about mineral fertilization. the effect of levels and forms of nitrogen applications on yield of pods and green and dry grains of cowpea-bean, cv. ipa 206 was evaluates. the experiment was performed at the universidade federal da paraíba, in areia, brazil, from april to august/2001, in a randomized blocks design. treatments were distributed in a factorial scheme 5 x 2, where the first factor corresponded to nitrogen levels (0; 25; 50; 75 and 100 kg ha-1) and, the second factor, the application forms (soil and foliar application), in four repetitions. each plot consisted of 20 plants, spaced 0.8 x 0.4 m apart. the estimated maximum pods yield (11 t ha-1), of green grains (9.3 t ha-1) and of dry grains (3.6 t ha-1) was obtained with 62, 61 and 56 kg ha-1 of nitrogen applied in the soil, respectively. with foliar applications the yield of pods (10 t ha-1), of green grains (8.4 t ha-1) and of dry grains (3.4 t ha-1) reached maximum values applying levels of 64, 63 and 59 kg ha-1 of nitrogen respectively.
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.
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.
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.
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.
Produtividade da batata-doce em fun??o de doses de K2O em solo arenoso
Brito, Carlos Henrique de;Oliveira, Ademar P de;Alves, Adriana Ursulino;Dorneles, Carina S M;Santos, Jo?o F dos;Nóbrega, José P R;
Horticultura Brasileira , 2006, DOI: 10.1590/S0102-05362006000300010
Abstract: the response of sweet potato rainha branca cv., cultivated under different k2o levels was evaluated. the experiment was carried out in randomized blocks design with four replications in a quartz psamment soil at universidade federal da paraíba, paraiba state, brazil, from july to november/2004. the k2o levels applied were 0; 50; 100; 150; 200 and 250 kg ha-1). the plots consisted of 48 plants, spaced of 0.80x0.30 m. the maximum estimated values, 14.8 and 8.4 t ha-1 of total and commercial roots yield, were obtained with 194 and 174 kg ha-1 of k2o, respectively. however, the most economic level of commercial roots yield (6.0 t ha-1) was reached using 163 kg ha-1 of k2o. the k2o levels resulting in maximum roots yield and economic return, were correlated respectively with 125 and 121 mg dm-3 of available k with mehlich 1 extractor. the probability for sweet potato response under potassic fertilization in similar soils will be minimized if the level of available k in the soil were superior to 121 mg dm-3. for utilized soil in this study, 163 kg ha-1 of k2o can be recommended for sweet potato fertilization.
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.
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