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Search Results: 1 - 10 of 388142 matches for " Arnaldo Nonato P de;Silva "
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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.
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.
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.
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.
Produ??o de rizóforos comerciais de Inhame em fun??o de doses de nitrogênio
Oliveira, Ademar Pereira de;Barbosa, Luciano José das N;Pereira, Walter E;Silva, José Elenilson L da;Oliveira, Arnaldo Nonato P de;
Horticultura Brasileira , 2007, DOI: 10.1590/S0102-05362007000100014
Abstract: yam is a worldwide consumed vegetable and is considered an alternative crop that is in expansion. however, the average yield of this crop is low, probably due to the low availability of nutrients in the soil of cultivated areas. the present study evaluated the production of yam, da costa, cv., as a result of nitrogen fertilization. an experiment was carried out between march and december/2005 at universidade federal da paraíba, in areia, brazil. a randomized block design was used, with five levels (0; 50; 100; 150 and 200 kg ha-1), supplied in covering fertilization, with four replications. the estimated length of rhizophors was 32 cm reached using 70 kg ha-1 of n. the average mean diameter of 7.0 cm, was not affected by n levels. the mean weight of rhizophors increased up to 1.5 kg, when an estimated n level of 120 kg ha-1 was applied. the maximum yield of commercial rhizophors was 19.2 t ha-1, from an estimated n level of 120 kg ha-1, while the economical yield of commercial rhizophors was 13.9 t ha-1 obtained when n level of 118 kg-1 were used. the n contents in leaves of yam increased linearly with levels of n fertilization.
Características produtivas da batata-doce em fun??o de doses de P2O5, de espa?amentos e de sistemas de plantio
Oliveira, Ademar Pereira de;Silva, José Elenilson Luna da;Pereira, Walter Esfrain;Barbosa, Luciano José das Neves;Oliveira, Arnaldo Nonato P. de;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000400003
Abstract: the influence of phosphate fertilization, spacing and planting systems were evaluated on the yield of sweet potato roots rainha branca cv. the experiment was carried out from february to july/2004 in quartz psamment soil, in the universidade federal of paraíba, areia-pb, brazil. it was used experimental design of randomized blocks in sub divided plots in four replications. in the main plots, twenty treatments were tested forming five levels of p2o5 (0, 100, 200, 300 and 400 kg ha-1), combined factorially with four spacing among plants (0.20, 0.30, 0.40 and 0.50 m) for 0.80 m among lines; and in subplots, two planting for ms (one and two stems/hole). the largest production of commercial/plant roots (662 g) was obtained in planting system with a stems/hill, in the spacing of 0.80 m x 0.50 m (25.000 plants ha-1) with 180 kg ha-1 of p2o5. the commercial roots productivity of sweet potato roots, considering p2o5 levels at planting system with one stems/hole, were 18.7 t ha-1 obtained with 210 kg ha-1 of p2o5. the productivity in the planting system using two stems/hole were 18.9 t ha-1, and it was reached with 231 kg ha-1 of p2o5. the largest productivity on spacing function (19.64 t ha-1) was obtained with 0.30 m among plants, in the planting system with two stems/holes (83.330 plants ha-1).
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.
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.
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