oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 59 )

2019 ( 393 )

2018 ( 516 )

2017 ( 569 )

Custom range...

Search Results: 1 - 10 of 387647 matches for " Ademar P de;Silva "
All listed articles are free for downloading (OA Articles)
Page 1 /387647
Display every page Item
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
Horticultura Brasileira , 2003,
Abstract: Avaliou-se o efeito de doses e formas de aplica o de nitrogênio sobre o rendimento de vagens e de gr os verdes e secos do feij o-caupi, cv. IPA 206. O experimento foi conduzido na área experimental da UFPB, em Areia, de abril a agosto/2001. O delineamento utilizado foi de blocos casualizados, com os tratamentos distribuídos em esquema fatorial 5 x 2, onde o primeiro fator correspondeu às doses de nitrogênio (0; 25; 50; 75 e 100 kg ha-1) e, o segundo fator, às formas de aplica o (solo e via foliar), em quatro repeti es. Foram utilizadas parcelas de 20 plantas, espa adas de 0,8 x 0,4 m. O rendimento máximo estimado de vagens (11 t ha-1), de gr os verdes (9,3 t ha-1) e de gr os secos (3,6 t ha-1) foi obtido com 62, 61 e 56 kg ha-1 de nitrogênio aplicados no solo, respectivamente. Quando o nitrogênio foi aplicado via foliar os rendimentos de vagens (10 t ha-1), de gr os verdes (8,4 t ha-1) e de gr os secos (3,4 t ha-1) alcan aram valores máximos nas doses de 64, 6 e 59 kg ha-1, respectivamente.
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.
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.
Produ??o de batata-doce em fun??o de doses de P2O5 em dois sistemas de cultivo
Oliveira, Ademar P. de;Silva, José Elenilson L. da;Pereira, Walter Esfrain;Barbosa, Luciano J. das Neves;
Horticultura Brasileira , 2005, DOI: 10.1590/S0102-05362005000300016
Abstract: the influence of phosphate fertilization and planting systems were evaluated on the yield and quality of sweet potato roots, rainha branca cv. the experiment was carried out from february to july/2003 in a quartz psamment soil in paraiba state, brazil. the experimental design was of randomized blocks with four replications. treatments were distributed in a 5 x 2 factorial design, with five levels of p2o5 (0; 100; 200; 300 and 400 kg ha-1 ) and two planting systems (one and two stems/hole). total and commercial sweet potato roots production, in response to p2o5 levels with one stem/hole, were 21.6 and 18.7 t ha-1 obtained with 237 and 210 kg ha-1 of p2o5, respectively. using two stems/hole, 23.5 and 18.9 t ha-1 were obtained when 259 and 231 kg of p2o5, were employed, respectively. levels of 173 and 194 kg of p2o5 applied for one and two stems/hole, respectively, were economically viable for the commercial roots production. the economical level in the planting system using one stem/hole, was 82% of the technical maximum efficiency (tme) and for two stems/hole was 84% tme being an indicative of economical viability of phosphorus application in sweet potato. p2o5 levels that resulted in maximum production and economical returns for commercial roots for planting systems with one and two stems/hole were 21 and 19 mg dm-3 of phosphorus available, using melich-1 extractor. in similar soil types for commercial roots production, the phosphate fertilization will be dispensed, when available phosphorus levels were higher than 19 and 20 mg dm-3 of soil in planting systems with one and two stems/hole.
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.
Qualidade do inhame afetada pela aduba??o nitrogenada e pela época de colheita
Oliveira, Ademar P de;Barbosa, Luciano José das N;Silva, Silvanda de M;Pereira, Walter E;Silva, José Elenilson L da;
Horticultura Brasileira , 2006, DOI: 10.1590/S0102-05362006000100005
Abstract: yam is a highly nutritive horticultural crop of great importance in the northeastern region of brazil. this study was developed in paraíba state, brazil, from march to december/2002, to quantify the dry matter, starch and yam ash content of rhizophors of the da costa cultivar, grown in ustipsamment soil. treatments were five n levels (0; 50; 100; 150 and 200 kg ha-1) and two harvest times (seven and nine months after planting date). a factorial scheme 5 x 2 in randomized blocks with four replications was used. dry matter content increased from 33.2% to 34.1% comparing harvest dates of seven and nine months after planting, not being influenced significantly by n levels. starch content increased from 21.5% to 25.3%, at nine months. the starch content at nine months increased with increasing n levels, reaching the maximum value of 30% at 55 kg ha-1 of n. the ash content was affected by n levels increasing until 65 kg ha-1 of n and reaching the maximum value of 0.8%. at nine months, an average value of 0.8% was obtained, without significant effects of n levels.
Produ??o do piment?o adubado com esterco bovino e biofertilizante
Araújo, Evanduir N. de;Oliveira, Ademar P. de;Cavalcante, Lourival F.;Pereira, Walter E.;Brito, Noelma M. de;Neves, Cynthia M. de L.;Silva, érllens é. da;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2007, DOI: 10.1590/S1415-43662007000500003
Abstract: with the objective of evaluating bell pepper fertilized with cattle manure with and without biofertilizer, an experiment was carried out from january to june 2004, in quarts psamment at ufpb, areia, pb, brazil. the experimental design was randomized block, with three replications in sub-divided plots. the plot was constituted by 32 and the sub-plot by 16 plants, spaced at 1.00 x 0.50 m. in the plots, six levels of cattle manure (0, 10, 20, 30, 40 and 50 t ha-1) were appraised, while in the sub-plots the forms of application of the biofertilizer (with and without application of biofertilizer in the soil and spraying on the leaves) and an additional treatment with mineral and organic fertilizer. in the absence of biofertilizer, 28 t ha-l estimated level of cattle manure was responsible for maximum yield of fruits per plant (389 g) and for commercial fruits (7.8 t ha-l), while biofertilizer used in spray application, the levels of 14.5 and 14.0 t ha-l of cattle manure, respectively, promoted maximum production of fruits per plant of 485 g and maximum productivity of commercial fruits of 9.6 t ha-1. the biofertilizer presence into the soil, promoted mean production of 410 g of fruits per plant and productivity of 8.3 t ha-1 of commercial fruits, in function of cattle manure. the combination cattle manure and biofertilizer in the leaves was the best organic fertilization form in the bell pepper, with additional of 1.8 and 1.3 t ha-1 in the productivity of commercial fruits, comparing with those obtained with cattle manure and biofetilizer used in the soil, respectively. there is no significance difference among organic treatments and conventional fertilization in the bell pepper productivity.
Page 1 /387647
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.