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Search Results: 1 - 10 of 235697 matches for " Carneiro José Geraldo de Araújo "
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Crescimento de mudas de Anadenanthera macrocarpa (Benth) Brenan (angico -vermelho) em substrato fertilizado e inoculado com rizóbio
Chaves, Luciana de Lima Brand?o;Carneiro, José Geraldo de Araújo;Barroso, Deborah Guerra;
Revista árvore , 2006, DOI: 10.1590/S0100-67622006000600006
Abstract: seedlings of anadenanthera macrocarpa (red angico) were grown in 18 x 15 cm black polyethylene bags. the growth medium was sieved and mixed with residues of sugarcane bagasse + decomposed filter cake (3:2, v:v) the objective was the evaluation of the fertilization and inoculation with rhizobium on the quality of the seedlings. two experiments were carried out. in each one, separately, ammonium sulfate and ammonium nitrate were added, in three different doses. in both experiments, a specific rhizobium species was also inoculated together with the seeds. a completely randomized design with three replicates was used. at 180 days after sowing, the seedlings were evaluated for height (h), root collar diameter (d), h/d ratio, shoot and root dry matter weights, leaf area and root regeneration potential. it was concluded that inoculation with rhizobium was sufficient to stimulate growth of "red-angico" seedlings in this substrate. the tested fertilizers were not efficient for the stimulation of seedling growth.
Growth of bare root Pinus taeda, L. seedlings cultivated under five densities in nursery
Carneiro, José Geraldo de Araújo;Barroso, Deborah Guerra;Soares, Luis Maurício da Silva;
Scientia Agricola , 2007, DOI: 10.1590/S0103-90162007000100004
Abstract: seedlings compete for nutrients, water and light. the available area for each seedling affects their behavior related to requirements for these resources. this experiment evaluated the influence of five plant densities on the growth of bare root pinus taeda, l. seedlings in a nursery after outplanting. the analyzed characteristics were: height (h), root collar diameter (d), h/d ratio, and dry matter weight. higher densities stimulated h growth and the lowest densities increased d average and dry matter weight and lowered the h/d ratio. seedlings were distributed by h, d and h/d classes. higher densities had a larger number of seedlings in larger h classes. larger numbers of seedlings with larger d and lower h/d ratios were found in lower densities. ten months after outplanting the seedlings grown in lower densities had higher survival percentages and growth. some saplings of standardized heights were uprooted with the objective of studying their root systems. the lowest densities stimulated higher numbers of first and second order roots as well as fresh and dry matter weights of thin roots with mycorrhizae presence. in both parts of the experiment, the density of 278 seedlings m-2 yielded equivalent averages as compared to the lowest densities.
Crescimento inicial de Eucalyptus tereticornis em plantios puro e consorciado com Mimosa caesalpiniifolia E Mimosa pilulifera, em Campos dos Goytacazes-RJ
Balbinot, Ernando;Carneiro, José Geraldo de Araújo;Baroso, Deborah Guerra;Paes, Herval Martinho Ferreira;
Revista árvore , 2010, DOI: 10.1590/S0100-67622010000100001
Abstract: the objective of this work was to evaluate the initial growth of outplanted eucalyptus tereticornis in pure and mixed mimosa caesalpiniifolia-mimosa pilulifera stands and their effects on soil characteristics in campos dos goytacazes-rj. survival rates, height, ground level diameter and diameter at breast height were evaluated over 30 months. soil characterization at 0-5 and 5-10 cm depths was carried out at 6 and 30 months after outplantings. the experiment was set up in a randomized block design with 4 replications, with 14 measurable plants per plot. thirty months after outplantings, the mixed e. tereticornis-m. caesalpiniifolia stand showed higher survival (87%) and better performance for dendrometric measurements. in the mixed ouplantings, the soil c content was lower at the 5-10 cm depth. contents of p, ca and base saturation (%) were lower, while ph, n, na, al and h+al showed higher values in all the outplanting systems. in pure and mixed with mimosa caesalpiniifolia outplantings, k contents were lower at the 0-5 cm depth. mixed e. tereticornis m. caesalpiniifolia outplantings caused reduction in effective ctc (exchangeable cation capacity), sum of bases and mg content
Substrato de cavas de extra o de argila enriquecido com subprodutos agroindustriais e urbanos para produ o de mudas de sesbania
Coutinho Marcos Pellegrini,Carneiro José Geraldo de Araújo,Barroso Deborah Guerra,Rodrigues Luciana Aparecida
Revista árvore , 2006,
Abstract: O trabalho teve como objetivo avaliar o crescimento, em casa de vegeta o, de mudas de Sesbania virgata (Cav.) Pers., produzidas em substrato de cavas de extra o de argila e adubadas com subprodutos organicos. As mudas foram cultivadas em vasos de 5 L, adicionando-se ao substrato "ferkal", composto de lixo urbano e torta de filtro, em diferentes doses (40, 80, 120 e 160 g dm-3), e comparadas com o controle (sem aduba o). O experimento foi conduzido em delineamento inteiramente casualizado, com cinco repeti es, constituídas de uma planta. Aos quatro meses após a semeadura, foram feitas avalia es de altura, diametro do colo, matéria seca da parte aérea e de raízes laterais. Também foram determinados comprimento, área superficial das raízes laterais, coloniza o micorrízica e teores foliares de N, P e K. O substrato sem aduba o originou mudas com maiores dimens es de altura, diametro do colo e matéria seca da parte aérea. Contudo, n o houve diferen as com rela o à matéria seca, comprimento e área superficial das raízes e coloniza o micorrízica, entre os tratamentos. Constatou-se tendência de crescimento dos valores das características morfológicas da parte aérea das mudas, à medida que as doses foram aumentadas. Os teores foliares de N, P e K das mudas que n o receberam adi o dos subprodutos foram menores em rela o às mudas adubadas. Os resultados evidenciaram que o uso de sesbania para revegeta o de cavas de extra o de argila n o implica gastos adicionais com fertilizantes organicos. Entretanto, a adi o dos subprodutos estudados pode favorecer a forma o de serapilheira mais rica em nutrientes.
Substrato de cavas de extra??o de argila enriquecido com subprodutos agroindustriais e urbanos para produ??o de mudas de sesbania
Coutinho, Marcos Pellegrini;Carneiro, José Geraldo de Araújo;Barroso, Deborah Guerra;Rodrigues, Luciana Aparecida;Siqueira, Jo?o;
Revista árvore , 2006, DOI: 10.1590/S0100-67622006000100018
Abstract: the objective of this work was to evaluate sesbania virgata (cav.) pers. seedling growth, in greenhouse condition, cultivated in a substrate collected in a clay extraction area and fertilized with organic byproducts. the seedlings were grown in containers (5 l) filled with this growth medium and fertilized with "ferkal", urban waste and sugar cane filter cake in different doses (40, 80, 120 and 160 g dm-3) and compared to the control treatment (substrate without fertilization). the experiment was carried out in a completely randomized design, with five replicates of one seedling. four months after sowing, stem height, root collar diameter, shoot and lateral roots dry matter were evaluated. length, superficial area and mycorrhizal colonization of the roots were evaluated, as well as the n, p and k content of the leaves. the control seedlings showed higher values for stem height, root collar diameter and shoot dry matter. however, no difference related to the root dry matter length, root superficial area, and mycorrhizal colonization among the treatments were observed. growth tendency of the shoot morphological characteristics of the seedlings was observed with increasing doses. the n, p and k leaf content was lower without addition of the byproducts in relation to the fertilized seedlings. sesbania seedlings can be planted in substrate from clay extraction area, without additional expenses with organic fertilizers. however, the addition of studied byproducts can promote the formation of a richer nutritional litter.
Avalia??o do potencial de regenera??o de raízes de mudas de Pinus taeda L., produzidas em diferentes tipos de recipientes, e o seu desempenho no campo
Novaes, Adalberto Brito de;Carneiro, José Geraldo de Araújo;Barroso, Deborah Guerra;Leles, Paulo Sérgio dos Santos;
Revista árvore , 2002, DOI: 10.1590/S0100-67622002000600004
Abstract: the quality of pinus taeda seedlings, produced in different types of containers, was evaluated based on root regeneration potential (rrp), to obtain seedling production with high survival rates and initial growth after planting. the study was conducted under greenhouse conditions, using five treatments: a) pressed blocks with 10 cm; b) 7 cm pressed blocks; c) bare root; d) d48 tubes (lower density); and e) d96 tubes (higher density). rrp in aquariums and boxes, was evaluated using the following parameters: a) total number of roots regenerated in aquariums; b) total number of regenerated roots > 1 cm in aquariums; c) total length of roots regenerated in aquariums and boxes (cm). seedling survival and initial growth were evaluated by measuring height of the aerial part and stem diameter at ground level. rrp was found to be a reliable physiological parameter to determine the quality of pinus taeda seedling and to predict its performance in the field. total length and number of new roots > 1 cm showed significant correlations with the performance of the seedlings in the field. the pinus taeda seedlings showing better quality for all the studied parameters, and field performance 24 months after planting were produced in 10 cm pressed blocks. the lowest averages for all parameters evaluated were observed in seedlings produced in tubes.
Produ??o de mudas de eucalipto com substratos para sistema de blocos
Freitas, Teresa Aparecida Soares de;Barroso, Deborah Guerra;Souza, Leonardo Silva;Carneiro, José Geraldo de Araújo;Paulino, Gleicia Miranda;
Revista árvore , 2010, DOI: 10.1590/S0100-67622010000500001
Abstract: the objective of this study was to determine mixtures of regional organic residues that present aggregation to the root system and make a good development possible for eucalyptus seedlings in block systems. residues of coconut fiber (fine fibers - fcf, long fibers - fcl and mixed fibers - fcm), eucalyptus bark (ce) and sugarcane filter cake (t) were used, with ten mixtures obtained. the blocks for the expansion tests were made in a steel form (11.5 x 2.3 cm), and afterwards moistening and evaluating for the volume and height increment. there was not a difference in the volume increment among the mixtures, and mixture 3 presented a larger increment in height than in mixture 8, however, they didn't differ from those remaining, with those chosen for use in the production of eucalyptus seedlings: fcm (40%) + t (60%); ce (60%)+ fcm (40%); ce (40%) + t (60%) and ce (40%) + t (30%) + fcm (30%). the choice was made in consideration of the component's readiness, because it did not differ in the tests. the eucalyptus urophylla seedlings were produced in 40x60x7cm trays, with 96 seedlings, sown directly in the blocks made with the selected mixtures pressed or not pressed. at 90 days the seedlings were evaluated for the diameter, height, shoot and root dry matter. in the expedition time, the substrata were evaluated as for the stability of the turf and the aggregation degree of the substrata to the seedlings roots. the nutritional analysis of the shoot seedlings was accomplished (n, p, k, ca, mg, mn, zn, fe). all the substrata presented aggregation and good stability. nutritional problems were not observed in the seedlings. for the production of eucalyptus urophylla seedlings in blocks with pressed substrata the substratum ce (60%) + fcm (40%) is recommended, and without being pressed the mixtures: ce (60%) + fcm (40%); ce (40%) + t (60%) and ce (40%) + t (30%) + fcm (30%) were recommended.
Outplanting performace of eucalyptus clonal cuttings produced in different containers and substrates
Freitas, Teresa Aparecida Soares de;Barroso, Deborah Guerra;Carneiro, José Geraldo de Araújo;Penchel, Ricardo Miguel;Coutinho, Marcos Pellegrini;
Revista árvore , 2008, DOI: 10.1590/S0100-67622008000600007
Abstract: the objective of this work was to evaluate the outplanting growth of eucalyptus grandis e e. saligna clones, produced by cuttings in tubes (50cm3) and in pressed blocks (40x60x07cm) - 175 cm3/ seedlings, with different substrates (bt - sugarcane bagasse+sugarcane filter cake; ar - carbonized rice hull + eucalyptus bark; tf - peat). the experiment was arranged in a randomized block design, in a 2x7 factorial (2 clones and 7 treatments), with four replicates with 25 plants. survival was evaluated two months later. plant growth was monitored through height and ground level diameter at 20, 40, 60, 120 and 180 days after outplanting. to evaluate the effect of the containers on stem and root biomass in both clones, 180 days after outplanting, the cuttings grown in bt substrate with fertilizer were selected. one plant per plot of each clone, grown in tubes and in pressed blocks was selected. the e. grandis and e. saligna cuttings grown in pressed blocks with sugarcane bagasse+sugarcane filter cake presented greater height and diameter after out planting. both clones presented larger root, bark, log and branch biomass production in plants produced in the block system. cuttings of e. saligna grown in pressed blocks showed 80% most wood biomass 180 days after outplanting, compared to that grown in tubes. in e. grandis, the differences in diameter and height, in function of the cutting production system, decreased along time, while in e. saligna these differences increased along the evaluation period.
Avalia o do potencial de regenera o de raízes de mudas de Pinus taeda L., produzidas em diferentes tipos de recipientes, e o seu desempenho no campo
Novaes Adalberto Brito de,Carneiro José Geraldo de Araújo,Barroso Deborah Guerra,Leles Paulo Sérgio dos Santos
Revista árvore , 2002,
Abstract: Avaliou-se a qualidade de mudas de Pinus taeda com base no estudo do potencial de regenera o de raízes (P.R.R.), visando alcan ar altas taxas de sobrevivência e crescimento inicial após o plantio. No viveiro, foram empregados cinco tratamentos: a) blocos prensados com 10 cm; b) blocos prensados com 7 cm; c) raiz nua; d) tubetes D48 (menor densidade); e) tubetes D96 (maior densidade). No laboratório avaliou-se o P.R.R. em aquários e caixas, por meio da determina o dos seguintes parametros: a) número total de raízes regeneradas em aquários; b) número total de raízes regeneradas maiores que 1 cm, em aquários; e c) comprimento total de raízes regeneradas em aquários e caixas (cm). No campo, foram avaliados a sobrevivência e o crescimento inicial através das medi es de altura da parte aérea e do diametro do caule ao nível do solo. O P.R.R. foi considerado um parametro fisiológico confiável na determina o da qualidade de mudas de Pinus taeda e na previs o de seu desempenho no campo. O comprimento total e o número de raízes novas maiores que 1 cm apresentaram correla es significativas com o desempenho das mudas no campo. As mudas de Pinus taeda de melhor padr o de qualidade, com altos valores de P.R.R. e melhor desempenho no campo 24 meses após o plantio, foram produzidas em blocos prensados com 10 cm. As médias mais baixas, para os parametros avaliados em laboratório e no campo, foram verificadas em mudas produzidas em tubetes.
Combina es de doses de molibdênio e nitrogênio na aduba o da cultura do feijoeiro-comum = Combinations of molybdenum and nitrogen doses on common bean fertilization
Paulo Roberto de Andrade Araújo,Geraldo Ant?nio de Andrade Araújo,Paulo Roberto Ribeiro Rocha,José Eustáquio de Souza Carneiro
Acta Scientiarum : Agronomy , 2009,
Abstract: Foram conduzidos dois experimentos em Coimbra, Estado de Minas Gerais,um no ver o-outono e outro na primavera-ver o com o objetivo de avaliar o efeito de diferentes doses de molibdênio e nitrogênio sobre o feijoeiro, cultivar Meia Noite, utilizando delineamento em blocos casualizados, com quatro repeti es, e esquema fatorial 4 x 2 x 2, envolvendo quatro níveis de molibdênio (0, 40, 80 e 120 g ha-1) aplicados em pulveriza o foliar aos 25 dias após a emergência das plantas, duas doses nitrogênio aplicadas na semeadura (0 e 20 kg ha-1) e aplicadas duas doses de nitrogênio em cobertura (0 e 50 kgha-1). Tanto na presen a como na ausência de nitrogênio na semeadura ou cobertura, o incremento da dose de molibdênio até 80 g ha-1 eleva o número de vagens por planta e a produtividade de gr os do feijoeiro. Em geral, as doses crescentes de molibdênio tambémelevam o número de gr os por vagem e a massa de 100 sementes, mas estes efeitos s o mais dependentes do emprego de nitrogênio de semeadura ou cobertura. Os efeitos do molibdênio sobre o teor de N total nas folhas, conteúdo de molibdênio na semente e leituras SPAD s o menos consistentes, por esta raz o, n o devem ser generalizados. Two experiments were carried out, one in summer-autumn and the otherduring spring-summer, in Coimbra, Minas Gerais State, in order to evaluate the effect of different doses of nitrogen and molybdenum on bean plants. The experimental design was randomized blocks, with four repetitions, in a 4 x 2 x 2 factorial arrangement, consisting offour levels of molybdenum (0, 40, 80 and 120 g ha-1), applied by foliar spraying at 25 days after plant emergence, two doses of nitrogen during sowing (0 and 20 kg ha-1) and two doses of nitrogen applied on the surface (0 and 50 kg ha-1). In the presence and in theabsence of nitrogen in the planting or on the surface, the increment of the molybdenum dose up to 80 g ha-1 elevates the number of pods per plant and the productivity of grains of bean. In general, increasing doses of molybdenum also elevate the number of grains of bean per pod and the mass of 100 seeds, but these effects are more dependent on the presence of sowing nitrogen or surface. The effects of molybdenum on the level of N in the leaves, molybdenum content in the seed and SPAD readings are less solid; for this reason, theyshould not be generalized.
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