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Search Results: 1 - 10 of 67016 matches for " Erivaldo José; "
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Water resources of Paraiba: a juridical and institutional approach
Erivaldo Moreira Barbosa,José Dantas Neto
Engenharia Ambiental : Pesquisa e Tecnologia , 2009,
Abstract: This article presents information on water resources management of Paraiba through a juridical and institutional approach. Therefore, legal and managerial aspects for instance, the concession on the right to use and tax the water resources, besides the procedures and position of the “Paraiba State Water Agency” – AESA , have been analyzed by the hermeneutic and systemic method. From the hermeneutics contained in the juridical documents as well as an applied questionnaire, it came to the conclusion that the concession has being partially implemented since the files have not been concluded yet. In relation to the taxing, the government proposal has not been made yet; in relation to AESA management procedures, there is a process of deconcentration causing consequently, a relative power centralization in the hands of the Executive power as well as the negligent attention by the government in relation to the effective society participation in state water resources issues.
Clonagem de quatro espécies de Annonaceae potenciais como porta-enxertos
Scaloppi Junior, Erivaldo José;Martins, Antonio Baldo Geraldo;
Revista Brasileira de Fruticultura , 2003, DOI: 10.1590/S0100-29452003000200026
Abstract: this work aimed to study the rooting capacity of four rootstocks (annona glabra l., annona montana macfad, rollinia emarginata and rollinia mucosa baill.) for annonaceae species. the experiment was carried out at unesp/fcav (21o15'22"s and 48o18'58"w). apical leafy cuttings were treated (5 seconds) with different concentrations of indolbutiric acid (iba) (0, 1000, 3000, 5000 and 7000 mg.l-1). after the treatment, the cuttings were placed in drilled box supplied with vermiculite under intermitent mist inside a lathhouse. it was used experimental design completely randomized in factorial scheme. after 90 days the evaluations were made for: percentage of rooted and survived cuttings, number and length of roots. the iba did not increase the rooting in the species. a. glabra and a. montana showed to be promising to cutting in summer. r. emarginata presented low values for all the evaluated characteristics and experiments must be intensified to promote the rooting. r. mucosa did not present satisfactory results, and the causes must be investigated better. for all the evaluated characteristics, the annona species presented better values in relation to rollinia.
Clonagem de quatro espécies de Annonaceae potenciais como porta-enxertos
Scaloppi Junior Erivaldo José,Martins Antonio Baldo Geraldo
Revista Brasileira de Fruticultura , 2003,
Abstract: O trabalho objetivou o estudo da capacidade de enraizamento de quatro espécies de Annonaceae potenciais como porta-enxertos (Annona glabra L., Annona montana Macfad, Rollinia emarginata e Rollinia mucosa Baill.) em três épocas do ano (ver o, outono e inverno). Experimento conduzido em camara de nebuliza o intermitente pertencente à UNESP/FCAV (21o15'22"S e 48o18'58"W), utilizando-se de estacas apicais enfolhadas em tratamento rápido (5 segundos) com ácido indolbutírico (IBA) (0; 1000; 3000; 5000 e 7000 mg.L-1), em esquema fatorial. Após 90 dias, avaliaram-se a porcentagem de estacas enraizadas, sobrevivência, comprimento e número de raízes. Como resultados, o IBA n o incrementou a capacidade de enraizamento das espécies. A época do ano foi grande influente no sucesso de enraizamento, sendo o ver o mais adequado. A. glabra e A. montana mostraram-se promissoras na propaga o vegetativa via estaquia (clonagem). R. emarginata apresentou baixos valores para as características avaliadas, devendo ser intensificados experimentos na promo o do enraizamento em rela o aos atuais valores obtidos. R. mucosa n o apresentou resultados satisfatórios, ocorrendo necrose de tecido na base das estacas, devendo as causas serem melhor investigadas. O sucesso no enraizamento de Annonaceae é dependente da espécie, tendo aquelas do gênero Annona apresentado resultados superiores em rela o às do gênero Rollinia.
Caracteriza??o espectral de áreas de gramíneas forrageiras infectadas com a doen?a "mela-das-sementes da braquiária" por meio de imagens CCD/CBERS-2
Rosatti, José C.;Silva, Erivaldo A. da;Silva, Hélio R.;Kruppa, Pedro C.;
Engenharia Agrícola , 2006, DOI: 10.1590/S0100-69162006000300019
Abstract: ccd/cbers-2 images in the spectral bands of ccd2, ccd3 and ccd4 of the years 2004 and 2005, from mirante do paranapanema - sp (brazil), were transformed into surface reflectance images using the 5s atmospheric correction model and radiometrically normalized. the main objective was to spectrally characterize pastures of brachiaria brizantha in the flowering phase, exempt and infected with the disease "mela-das-sementes da braquiária" making it possible its detection through the comparison among the sbrf - surface bidirectional reflectance factor values. at the same time, it was aimed to evaluate the effectiveness of the ccd/cbers-2 images to obtain spectral responses of pastures. the healthy and diseased vegetation canopies were identified through the analysis of the surface reflectance values and the observed data of the accumulative crop water stress index (acwsi) obtained from the study area. the results indicated that the main differences were the decrease of the reflectance in the ccd3 band and the increase of the reflectance in the ccd4 band in the diseased areas. using the ccd/cbers-2 data associated with the acwsi, the methodology was effective to discriminate the vegetation canopies infected with the "mela-das-sementes da braquiária".
Prediction of direct and indirect genetic gains and genotypic correlations in rubber tree progenies
Verardi, Cecília Khusala;Scaloppi Junior, Erivaldo José;Gon?alves, Paulo de Souza;
Pesquisa Agropecuária Brasileira , 2011, DOI: 10.1590/S0100-204X2011000900015
Abstract: the objective of this work was to estimate the genetic parameters, genotypic and phenotypic correlations, and direct and indirect genetic gains among and within rubber tree (hevea brasiliensis) progenies. the experiment was set up at the municipality of jaú, sp, brazil. a randomized complete block design was used, with 22 treatments (progenies), 6 replicates, and 10 plants per plot at a spacing of 3x3 m. three?year?old progenies were assessed for girth, rubber yield, and bark thickness by direct and indirect gains and genotypic correlations. the number of latex vessel rings showed the best correlations, correlating positively and significantly with girth and bark thickness. selection gains among progenies were greater than within progeny for all the variables analyzed. total gains obtained were high, especially for girth increase and rubber yield, which were 93.38 and 105.95%, respectively. young progeny selection can maximize the expected genetic gains, reducing the rubber tree selection cycle.
Capacidade de enraizamento de variedades de nespereira submetidas à poda de renova??o
Scaloppi Junior, Erivaldo José;Jesus, Natanael de;Martins, Antonio Baldo Geraldo;
Revista Brasileira de Fruticultura , 2004, DOI: 10.1590/S0100-29452004000100017
Abstract: this work aimed to study the rooting capacity of five varieties of loquat (eriobotrya japonica lindl.), champagne, precoce de itaquera, mizuho, mogui and tanaka. plants of 20 years of age were submitted to severely pruning. after budding apical softwood cuttings were taken and treated (5 seconds) with concentrations of indolbutiric acid (iba) (0, 1000, 3000, 5000 and 7000 mg.l-1). the cuttings were placed in drilled box supplied with vermiculite under intermitent mist inside a lathhouse belonging to unesp/fcav (21o15'22" s e 48o18'58" w). the experimental design used was the complete randomized, factorial scheme 5x5 (5 epecies and 5 iba concentrations), four repetitions with 10 cuttings per plot. the evaluations were made after 90 days. the results indicated an increment of rooting and number of roots with the increase of concentration of iba, except for the variety mogui that just presented better results for the length of roots. the cuttings presented high survival (90%), with conditions to be planted in the field after the sixth month (from the cutting) or be grafted in the eighth month.
Resposta diferencial das cultivares de algodoeiro a Alternaria macrospora
Mehta, Yeshwant Ramchandra;Teixeira, Eliria;Cunha, Helio;Erivaldo, José;Ruano, Onaur;
Summa Phytopathologica , 2006, DOI: 10.1590/S0100-54052006000200016
Abstract: the differential response of 32 commercial cotton cultivars to a. macrospora was studied under greenhouse conditions. twenty to twentyfive days old plants were inoculated in 25 repetitions in a randomized block design. the cultivars were grouped using the scott & knott analysis. complete resistance was not found and all cultivars were susceptible to the pathogen. differential reaction within the plants of the same cultivar was observed. however, when some resistant plants of cultivars brs antares and fibermax 986 were inoculated using a mixture of nine randomly selected isolates of a. macrospora, the plants maintained their resistance. further research is necessary to find sources of resistance to this pathogen in other species of gossypium.
Nutrientes minerais na biomassa da parte aérea em culturas de cobertura de solo
Borkert Clóvis Manuel,Gaudêncio Celso de Almeida,Pereira José Erivaldo,Pereira Leonardo Régis
Pesquisa Agropecuária Brasileira , 2003,
Abstract: O objetivo deste trabalho foi estimar as quantidades de nutrientes reciclados por cinco espécies vegetais utilizadas como culturas de cobertura do solo e que podem retornar ao solo pela mineraliza o da biomassa. Foram coletadas de vários experimentos amostras da matéria verde de aveia-preta (Avena strigosa Schreb), mucu-napreta (Stizolobium aterrimum Piper & Tracy), guandu (Cajanus cajan (L.) Millsp), tremo o (Lupinus albus L. e L. angustifolius L.) e ervilhaca (Vicia sativa L.). Foi estimado o rendimento de matéria seca e determinados os teores de N, P, K, Ca, Mg, Mn, Zn, Cu, e, a partir dessas concentra es, foram calculadas a média observada, a média estimada e o intervalo de confian a a 95% para cada nutriente dentro de cada classe de rendimento de matéria seca, em cada espécie vegetal. Os dados foram tabulados dentro de intervalos de classe de rendimento de matéria seca e apresentadas as quantidades estimadas de nutrientes minerais. Foram ajustadas equa es para estimar as quantidades desses nutrientes. A aveia-preta e a ervilhaca reciclam grande quantidade de K, e a ervilhaca, a mucu-napreta, o tremo o e o guandu reciclam grande quantidade de N. Todas as espécies reciclam quantidades apreciáveis de Ca, Mg e micronutrientes, porém baixas quantidades de P. A rota o de culturas é um meio de implementar com sucesso o aumento das áreas de lavoura em semeadura direta.
Different methods to assess yield temporal stability in rubber
Gouvêa, Lígia Regina Lima;Silva, Guilherme Augusto Peres;Scaloppi Junior, Erivaldo José;Gon?alves, Paulo de Souza;
Pesquisa Agropecuária Brasileira , 2011, DOI: 10.1590/S0100-204X2011000500006
Abstract: the objective of this work was to assess, during six years, the temporal stability of natural rubber yield of 25 superior hevea brasiliensis genotypes, using the wricke, eberhart & russell, lin & binns, additive main effect and multiplicative interaction (ammi) analysis, and harmonic mean of the relative performance of the genetic values (hmrpgv) methods. the iac 40 and iac 300 genotypes were identified as stable and high yielding by the eberhart & russell, lin & binns, hmrpgv, and ammi biplot methods. the ranking of the other more stable genotypes identified by these analyses was altered. the observed results in the ammi biplot agreed with those observed in the wricke method for identifying stable, but lower yielding genotypes. the simultaneous use of different methods allows a more accurate indication of stable genotypes. stability analyses based on different principles show agreement in indicating stable genotypes.
Nutrientes minerais na biomassa da parte aérea em culturas de cobertura de solo
Borkert, Clóvis Manuel;Gaudêncio, Celso de Almeida;Pereira, José Erivaldo;Pereira, Leonardo Régis;Oliveira Junior, Adilson de;
Pesquisa Agropecuária Brasileira , 2003, DOI: 10.1590/S0100-204X2003000100019
Abstract: the objective of this work was to estimate the quantity of nutrients recycled by five species of cover crops and returned to the soil after the mineralization of the biomass. fresh samples of several experiments of black oats (avena strigosa schreb), black mucuna (stizolobium aterrimum piper & tracy), pigeon pea (cajanus cajan (l.) millsp), lupin (lupinus albus l. and l. angustifolius l.) and common vetch (vicia sativa l.) were taken to estimate dry matter yield and determine the content of n, p, k, ca, mg, mn, zn, and cu. from the dry matter yield, nutrient content were analyzed, and the estimated and observed mean, and a confidence limit at the 95% level, for each nutrient, in each class of dry matter yield and in each cover crop species were calculated. the data were tabulated with the corresponding dry matter class intervals and estimated quantity of nutrients. equations were adjusted to estimate the quantity of nutrients in relation to dry matter yield. black oats and common vetch, are good for recycling k, and common vetch, black mucuna, lupin and pigeon pea recycled large amounts of n. all species recycled large amounts of ca, mg and micronutrients, but small amounts of p. crop rotation is a way of successfully increasing field areas under no-tillage.
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